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Copyright of Rare Metals is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Abstract Vascularization plays a significant role in promoting the expedited process of bone regeneration while also enhancing the stability and viability of artificial bone implants. Although titanium alloy scaffolds were designed to mimic the porous structure of human bone tissues to facilitate vascularization in bone repair, their biological inertness restricted their broader utilization. The unique attribute of Metal-organic framework (MOF) MIL-53(Fe), known as “breathing”, can facilitate the efficient adsorption of extracellular matrix proteins and thus provide the possibility for efficient interaction between scaffolds and cell adhesion molecules, which helps improve the bioactivity of the titanium alloy scaffolds. In this study, MIL-53(Fe) was synthesized in situ on the scaffold after hydrothermal treatment. The MIL-53(Fe) endowed the scaffold with superior protein absorption ability and preferable biocompatibility. The scaffolds have been shown to possess favorable osteogenesis and angiogenesis inducibility. It was indicated that MIL-53(Fe) modulated the mechanotransduction process of endothelial cells and induced increased cell stiffness by promoting the adsorption of adhesion-mediating extracellular matrix proteins to the scaffold, such as laminin, fibronectin, and perlecan et al., which contributed to the activation of the endothelial tip cell phenotype at sprouting angiogenesis. Therefore, this study effectively leveraged the intrinsic “breathing” properties of MIL-53 (Fe) to enhance the interaction between titanium alloy scaffolds and vascular endothelial cells, thereby facilitating the vascularization inducibility of the scaffold, particularly during the sprouting angiogenesis phase. This study indicates that MIL-53(Fe) coating represents a promising strategy to facilitate accelerated and sufficient vascularization and uncovers the scaffold-vessel interaction from a biomechanical perspective. Graphical Abstract

Vascularization plays a significant role in promoting the expedited process of bone regeneration while also enhancing the stability and viability of artificial bone implants. Although titanium alloy scaffolds were designed to mimic the porous structure of human bone tissues to facilitate vascularization in bone repair, their biological inertness restricted their broader utilization. The unique attribute of Metal-organic framework (MOF) MIL-53(Fe), known as "breathing", can facilitate the efficient adsorption of extracellular matrix proteins and thus provide the possibility for efficient interaction between scaffolds and cell adhesion molecules, which helps improve the bioactivity of the titanium alloy scaffolds. In this study, MIL-53(Fe) was synthesized in situ on the scaffold after hydrothermal treatment. The MIL-53(Fe) endowed the scaffold with superior protein absorption ability and preferable biocompatibility. The scaffolds have been shown to possess favorable osteogenesis and angiogenesis inducibility. It was indicated that MIL-53(Fe) modulated the mechanotransduction process of endothelial cells and induced increased cell stiffness by promoting the adsorption of adhesion-mediating extracellular matrix proteins to the scaffold, such as laminin, fibronectin, and perlecan et al., which contributed to the activation of the endothelial tip cell phenotype at sprouting angiogenesis. Therefore, this study effectively leveraged the intrinsic "breathing" properties of MIL-53 (Fe) to enhance the interaction between titanium alloy scaffolds and vascular endothelial cells, thereby facilitating the vascularization inducibility of the scaffold, particularly during the sprouting angiogenesis phase. This study indicates that MIL-53(Fe) coating represents a promising strategy to facilitate accelerated and sufficient vascularization and uncovers the scaffold-vessel interaction from a biomechanical perspective. [ABSTRACT FROM AUTHOR]

Recently, many efforts have been dedicated to construct artificial catalysts with enzyme-like activity. However, it is still a big challenge to endow artificial catalysts with specific substrate selectivity. In this study, we developed a facile strategy to construct a MIL-53(Fe)-based nanocatalyst with designable selectivity in the degradation of oxytetracycline (OTC). Through the Fe–O–P conjunction, oxytetracycline aptamer (OA) can be easily anchored on MIL-53(Fe) to provide the specific site for OTC binding. We verified that the obtained MIL-53(Fe)-Apt nanocatalyst displayed enhanced catalytic ability in the degradation of OTC, whereas obvious suppression toward other substrate analogues. This performance therefore brings about an anticipated selectivity toward OTC. Moreover, we highlighted that the configuration of aptamers on MIL-53(Fe) can be modulated through varying conjunction mode. Structure–function analysis revealed that aptamer configuration affects the local concentration of substrate around catalytic site, which thus decides the catalytic performance toward OTC. This work presented a facile and promising strategy for developing artificial catalysts with designable selectivity. [ABSTRACT FROM AUTHOR]

In this paper, a high‐performance composite nanofiber membrane with excellent air filtration and dye degradation properties was prepared by incorporating MIL‐53(Fe) nanoparticles into the electrospinning solution. The results showed that the filtration efficiency for PM2.5 of the PP/PVDF‐HFP/MIL‐53(Fe) composite nanofiber membrane reached up to 99.3% with the addition of 2 wt% MIL‐53(Fe). Moreover, the composite nanofiber membrane exhibited steady filtration efficiency across different parameters, including air velocity, PM2.5 concentration, and extended testing time. Furthermore, the incorporation of MIL‐53(Fe) significantly enhanced the removal efficiency of the composite nanofiber membrane toward Rh B, resulting in a remarkable 91% removal rate. The polymer/MOF composite nanofiber membranes prepared by simple and cheap electrospinning technology have a wide range of practical applications in the field of environmental protection. Highlights: PPM composite nanofiber membrane was prepared via electrospinning method.MIL‐53(Fe) nanoparticles were introduced to PPM composite nanofiber membrane.PPM composite nanofiber membrane showed excellent removal efficiency for PM2.5.PPM composite nanofiber showed a good removal performance for RhB in solution. [ABSTRACT FROM AUTHOR]

A novel post-synthetic modification of magnetite@MIL-53(Fe)-NH2 core-shell nanocomposite was performed to extract ultra-trace amounts of Pd(II) ions from the real samples. To explore and optimise the effect of parameters on the preconcentration design of the experiment was employed. The highest removal efficiency in the adsorption step was obtained using the following condition: pH of sample, 6.5; adsorption time, 3.8 min; magnetite@MIL-53(Fe)-NH-PITC NPs amount, 20 mg. The highest extraction recovery (%) was achieved using 0.8 mL of 0.85 mol L−1 HCl as the desorbing solution; and by applying an elution time of 3.5 min. Afterwards, to study the equilibrium data, various adsorption isotherm models were explored. The data showed that the Langmuir model describes the adsorption process better than the other models. Eventually, the maximum adsorption capacity and model constant equal to 100 mg g−1 and 0.11 L mg−1, were obtained, respectively. Besides, the kinetic data were well fitted to the pseudo-second-order based on the highest correlation coefficient that was achieved. The limit of detection, the limit of quantification, and the linear range of the proposed method were 0.05 μg L−1, 0.2 μg L−1, and 0.2–100 μg L−1 (r2 = 0.9936), respectively. The precision was explored as relative standard deviation value at three concentration of 0.5, 10, 75 ng mL−1 (n = 3) that was 12.5%, 9.3% and 6.6%, respectively. Ultimately, the new magnetic adsorbent could be employed for extraction/quantification of ultra-trace amounts of Pd(II) ions in real samples and the relative recovery values were obtained in the range of 88–102%. [ABSTRACT FROM AUTHOR]

By controlling the release of encapsulated antibacterial materials and the intrinsic antibacterial components of metal–organic frameworks (MOFs) through the slow degradation of their frameworks, the composite material that contains self‐degrading MOFs demonstrates synergistic antibacterial effects. In this study, MIL‐53(Fe) was investigated for finding MOFs that have metal oxides in the pores ([CuO]1.3@MIL‐53(Fe) and [ZnO]1.05@MIL‐53(Fe)) with antibacterial activity. MIL‐53(Fe) exhibits a significant surface area and precise pore structure, so it was a good choice for this study. MIL‐53(Fe) was synthesized by solvothermal method, and [Cu (CH3COO)2.H2O]1.0@MIL‐53(Fe) and [Zn (CH3COO)2.2H2O]0.5@MIL‐53(Fe) were prepared by immersion of the MOF in aqueous solution of [Cu (CH3COO)2.H2O] and [Zn (CH3COO)2.2H2O], respectively. Then, the [MO]x@MIL‐53(Fe) nanocomposites were prepared by thermal treatment of [Cu (CH3COO)2.H2O]1.0@MIL‐53(Fe) and [Zn (CH3COO)2.2H2O]0.5@MIL‐53(Fe) at 310°C and 290°C in N2 atmosphere, respectively. Fourier Transform Infrared Spectrometer, X‐ray powder diffraction, inductively coupled plasma–Optical Emission Spectrometry, Field Emission Scanning Electron Microscope, energy‐dispersive spectrometer‐mapping, and thermogravimetric analysis analyses were proved the successful synthesis of these compounds. Finally, the antibacterial activity of the composites was assessed against both Gram‐positive bacteria (Staphylococcus aureus) and Gram‐negative bacteria (Escherichia coli). [ABSTRACT FROM AUTHOR]

The development of a highly efficient catalyst for water splitting and photodegradation of organic dyes has become the focus of a considerable number of research groups. In the work described here CdZnS@MIL-53(Fe) and ZnS@MIL-53(Fe) were synthesized by the solvothermal method and subjected to thermal degradation at 520 °C in an oxidative environment to obtain CdZnS/Fe 2 O 3 and ZnS/Fe 2 O 3 , respectively. Electrocatalytic activity for the oxygen evolution reaction is analyzed via cyclic voltammetry and linear sweep voltammetry. It was found that CdZnS@MIL-53(Fe) shows maximum catalytic activity for the oxygen evolution reaction and delivers 10 mAcm−2 current density at 95 mV overpotential as compared to MIL-53(Fe)/NF (210 mV) and ZnS@MIL-53(Fe)/NF (112 mV). Similarly, the derivative of it, CdZnS/Fe 2 O 3 , shows maximum catalytic activity for the oxygen evolution reaction and delivers 10 mAcm−2 current density at 90 mV overpotential as compared to Fe 2 O 3 (204 mV) and ZnS/Fe 2 O 3 (115 mV). Based on these results, it is evident that these materials are highly efficient for OER activity compared with other materials in literature. Similarly, CdZnS/Fe 2 O 3 shows maximum photocatalytic activity for the photodegradation of Rhodamine B, up to 75% compared to CdZnS@MIL-53(Fe), which degrades up to 51% of the dye. The synthesized materials were characterized by powdered X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. Based on these results the aim is to develop more MOF-based materials and their derivatives by simple heat treatment and to implement them in different catalytic applications. [Display omitted] • Designing of highly efficient catalysts by in-situ incorporation of CdZnS nanoparticles in (MIL-53(Fe). • The newly designed CdZnS@MIL-53(Fe) and its derivative CdZnS/Fe 2 O 3 showed efficient OER activity. • The CdZnS/Fe 2 O 3 is also effective forphotodegradation of Rhodamine B (up to 75% in just 80 min). • The better catalytic activity is due to formation of heterojunction between CdZnS and MIL-53(Fe) or its derivative. [ABSTRACT FROM AUTHOR]

Copyright of Industrial Water Treatment is the property of CNOOC Tianjin Chemical Research & Design Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

MIL-53(Fe) and MIL-53(Fe)-2OH were prepared by solvothermal method, and the adsorption properties for Cr(VI) in solution were studied. The adsorption process of the two materials for Cr(VI) followed the pseudo-first-order (PFO) kinetic model, which belonged to physical adsorption. The adsorption for Cr(VI) on MIL-53(Fe)-2OH fitted to the Freundlich isotherm equation. The surface morphology of the MIL-53(Fe)-2OH changed after modified with double hydroxyl. The specific surface area (SSA) and total pore volume (TPV) increased from 7.7 m2/g and 0.016 cc/g to 16.77 m2/g and 0.045 cc/g. The adsorption performance of the materials improved with the content of hydroxyl functional group increased. Adsorption amount of the MIL-53(Fe)-2OH can reach 143.8 mg/g according to the kinetic fitting which was nearly three times that of MIL-53(Fe). The adsorption mechanism was mainly electrostatic attraction. [ABSTRACT FROM AUTHOR]

The catalytic activity of metal-organic frameworks (MOFs) in the degradation of environmental pollutants has garnered considerable interest recently. FTIR, FE-SEM, EDS, XRD, XPS, VSM, TEM, and N2 sorption-desorption isotherms were used to characterize Fe-based nanohybrids derived from MIL-53(Fe). In the catalytic ozonation of cefixime (CFX), the nanohybrid (CM-500) synthesized at 500 °C exhibited high efficiency. The enhanced catalytic activity of CM-500 may have been caused by Lewis acid sites (LAS), iron oxides, and oxygenated functional groups of the mesoporous carbon substrate that remained after pyrolysis of the organic framework. During 15 min of continuous ozonation, the CM-500/O 3 process was the most effective at removing CFX with a removal efficiency of 97%, significantly higher than single ozonation with a degradation efficiency of 43% under the same conditions. Modeling and optimization of process conditions were conducted using a novel and efficient class of experimental design, namely optimal design with the fewest possible runs. Calculated CFX degradation kinetic rate constants were 0.212 min-1 with CM-500, 0.043 min-1 with MIL-53 (Fe), and 0.038 min-1 for ozonation alone. Mineralization (measured COD and TOC) is significantly higher in the CM-500/O 3 system compared to single ozonation. Moreover, the scavenging experiment confirmed that the reactive oxygen species in the catalytic ozonation of CFX are surface-adsorbed superoxide and hydroxyl radicals. Due to CM-500's sustained activity and magnetic properties, it is expected that it has a high catalytic capacity for treating pharmaceutical wastewater. [ABSTRACT FROM AUTHOR]

The fabrication of photocatalysts with preferable degradation ability is critical to purify wastewater. MIL-53-(Fe), as a representative Fe-based metal–organic framework (Fe-MOF), has been widely used in photocatalysis due to its excellent intrinsic characteristics. However, the inadequate electron number in MIL-53-(Fe) has restricted the ability of photodegradation of organic pollutants. Herein, desirable, energy-efficient, and environmentally friendly MIL-53-(Fe)/Sn3O4 nanosheet photocatalysts were first constructed by the solvothermal method. The characterization results indicated that the MIL-53-(Fe)/Sn3O4-5 (5 wt % Sn3O4) catalyst exhibited optimal photoelectric properties and maintained a relatively regular morphology. Moreover, the prepared MIL-53-(Fe)/Sn3O4-5 exhibited preferable photodegradation ability for dyes and antibiotics under visible light, and the maximum photodegradation capacity for malachite green, methylene blue, tetracycline, ciprofloxacin, and ofloxacin could reach 96.9, 88.2, 70.3, 83.5, and 88.1%, respectively. The initial pH, photocatalyst dosage, and initial concentration were comprehensively investigated for degrading malachite green. In addition, we also explored the prepared catalyst for the removal of malachite green from different actual wastewater samples. After three cycles, the degradation efficiency of malachite green by MIL-53-(Fe)/Sn3O4-5 decreased very little, exhibiting good reuse performance. The enhanced photodegradation efficiency of MIL-53-(Fe)/Sn3O4-5 could be attributed to the construction of heterojunctions derived from a compact joint interface between Sn3O4 and Fe-MOF, which expedited the separation ability of photogenerated carriers and broadened the visible response range. The active species trapping experiments and electron spin-resonance results determined that many active species (h+, •OH, and •O2–) were involved in the photocatalytic process. Correspondingly, a convincible photodegradation mechanism between Sn3O4 and MIL-53-(Fe) was proposed according to the experimental results. This study demonstrates that the fabricated Sn3O4 and MOF composites can provide a feasible solution for the purification of wastewater. [ABSTRACT FROM AUTHOR]

Purpose: Environmental issues and lack of drinking water have forced researchers to find some alternatives to wastewater treatment. Because dyes are used in a variety of industrial applications such as textile and pharmaceutical, wastewater of these factories leads to several environmental problems. Using catalysis under ultraviolet-irradiation (photocatalysis) is one of the cases that is used in wastewater treatment. The purpose of this work is the photocatalytic degradation of dye (Reactive Red 198) and pharmaceutical (tetracycline) using MIL-53(Fe) and MIL-100(Fe). Design/methodology/approach: In this work, Reactive Red 198 (RR198), an anionic dye and tetracycline as a pharmaceutical are tested with two catalysts, MIL-53(Fe) and MIL-100(Fe). Catalyst synthesis method and characterization were discussed by X-ray diffraction, scanning electron microscopy and Fourier Transform Infrared analyses, and their results are described in detail. Findings: Dye concentration varies among 15, 20, 30 and 40 mg/L for MIL-100(Fe) for which the removal percent is 97%, 94%, 89% and 58% and for MIL-53(Fe), dye concentration increases from 20 to 40, 60 and 80 mg/L, the removal percent of which is 98%, 88%, 75% and 50%. Pharmaceutical degradation by MIL-53(Fe) and MIL-100(Fe) was 75% and 80%, respectively. Originality/value: Photocatalytic degradation of RR198 and tetracycline using MIL-53(Fe) and MIL-100(Fe) was not studied in detail. [ABSTRACT FROM AUTHOR]

Organic semiconductors are promising materials for the photocatalytic treatment of pollutants and organic synthesis. Herein, MIL-53(Fe)@perylene diimide (PDI) organic heterojunctions were constructed by ultrasonic assembly using PDI as the co-catalyst, and PDI organic supramolecular material was uniformly distributed on the surfaces of MIL-53(Fe). The most effective M53@PDI-20 organic heterojunctions achieved 72.7% photodegradation of rhodamine B (10 mg/L) within 50 min and a 99.9% reduction in Cr(VI) (10 mg/L) for 150 min, and the corresponding apparent degradation rate constants were higher than a single component. Meanwhile, the conversion rate of benzyl alcohol over M53@PDI-20 achieved 91.5% for 5 h with a selectivity of above 90% under visible light exposure, which was more than double that of PDI. The well-matched band structures and the strong π–π bonding interactions between MIL-53(Fe) and PDI can increase the electron delocalization effect to facilitate the transfer and separation of photogenerated carriers. Lots of oxidative reactive species (h+, •O2− and •OH) also played a great contribution to the strong oxidation capacity over the heterojunctions system. This work suggests that MIL-53(Fe)@PDI organic heterojunctions may be a promising material for pollutant removal and organic synthesis. [ABSTRACT FROM AUTHOR]

[Display omitted] • Iron shaped MOFs with diamond like structure were fabricated. • The band gap was 3.0 eV at 434 nm. • The photocatalytic degradation efficiency against CV dye is 97.98%. • DPPH assay showed EC50 at 179.79 with 76.68 % Inhabitation. This study investigates the antioxidant and photo-catalytic activities of diamond-shaped iron-based Metal-Organic Framework (MOFs) using MIL-53 as the chosen framework. The synthesis of diamond-shaped MIL-53(Fe) MOFs is presented using the solvothermal method. The structural properties of the sample were determined using FTIR, FESEM-EDX, and powder XRD methods. UV–visible Spectroscopy was used to investigate the band gap, which was 3.09 eV at 401 nm, and also employed to assess the photo-catalytic performance of the MOFs under simulated sunlight irradiation. Crystal violet (CV) dye was used to test the photo-catalytic efficacy of the sample with H 2 O 2, and compared to the absence of H 2 O 2 , the Iron-based MIL-53-H 2 O 2 system demonstrated improved photo-catalytic degradation performance, attaining a clearance rate of 97.98 % for CV after 100 min of exposure to sun radiation. The antioxidant activity of the sample was analyzed by using a DPPH assay. It showed EC50 at 179.7 and 76.68 % inhibition at 400 μg/ml. [ABSTRACT FROM AUTHOR]

Summary: In this research, Fe‐MOF (MIL‐53 [Fe]) was synthesized by solvothermal and applied as an anode of lithium‐ion batteries (LIBs). Carbonaceous material from pyrolyzed bacterial cellulose (pBC) was incorporated in the solvothermal synthesis of MIL‐53(Fe) to improve its morphology and electrochemical properties. The MIL‐53(Fe) with pBC addition (MIL‐53(Fe)@pBC) exhibited reduced particle size and size distribution, larger surface area and pore volume, and modified crystal shape and interior structure. The incorporation also altered the functional group of the dicarboxylic ligand and formed a thin carbon layer coating which enhanced electrical conductivity significantly. The refined microstructure of the MIL‐53(Fe)@pBC compared to the pure MIL‐53(Fe) was proved to enhance the electrochemical activities of the LIB cells. The specific capacity, rate capability, and cyclic performance were boosted with pBC addition due to the increased ion diffusion kinetics in the lithiation/delithiation process. Interestingly, the MIL‐53(Fe)@pBC anode showed a peculiar increase in the reversible capacity with LIB cycles after the initial capacity fading. The analysis after the 100th cycle suggested that the lithiation/delithiation process was mediated by phase transformation through the Li+ storage mechanism. This work has shown that the MIL‐53(Fe)@pBC is an excellent candidate for anode materials in LIBs with high efficiency at long life cycles. [ABSTRACT FROM AUTHOR]

MIL-53(Fe) was prepared and modified with benzoic acid to prepare MIL-53(Fe)-BA additive, which was used to improve the catalytic oxidation rate of sulfite, prevent the scaling of the desulfurization tower, and improve the desulfurization efficiency during the wet flue gas desulfurization (WFGD) process of power plants. MIL-53(Fe)-BA exhibits abundant Lewis acid sites because of the appearance of coordination unsaturated Fe atoms. Due to the excellent sorption capacity, Ca(OH)2 was used as the main SO2 desulfurizer. The composite desulfurizers were prepared by mixing MIL-53(Fe)-based additives and Ca(OH)2, and were characterized by SEM, XRD, and FT-IR. A desulfurization unit was set up at laboratory scale to study the effect of catalytic oxidation additives on sulfite oxidation and desulfurization efficiency. The results showed that the addition of MIL-53(Fe)-BA can increase the oxidation capacity of sulfite by 159%, and greatly improve the desulfurization efficiency. These composite desulfurizers broaden the adaptability of the desulfurizing system to high-sulfur coals, and provide support for improving the desulfurizing efficiency of power plants. [ABSTRACT FROM AUTHOR]

MIL-53(Fe), synthesized by a one-step hydrothermal method, was investigated for the removal of toluene and inactivation of bacteriophage ⲪX 174 in air under visible light illumination. MIL-53(Fe) exhibited superior photochemical activity to other metal organic frameworks synthesized by the same method with different metal precursors. Analytical methods of diffuse reflectance spectroscopy, BET specific surface area analysis, SEM-EDS, FT-IR analysis, XRD, Mott-Schottky analysis, and XPS were used to characterize MIL-53(Fe). The illuminated MIL-53(Fe) removed input toluene (C0 = 3.59 g/m3 ) by 66% in 6 h by adsorption and subsequent photocatalytic oxidation. High humidity and temperature, and the anoxic condition inhibited the toluene removal. MIL-53(Fe) showed sustainable toluene removal for five consecutive runs, even though the photocatalytic activity slightly decreased. Meanwhile, the illuminated MIL-53(Fe) also resulted in the inactivation of ⲪX 174 suspended in air, achieving approximately 3 log inactivation in 60 min (N0 = ~106 PFU/mL air). Similar to toluene removal, the presence of oxygen and low humidity were beneficial for viral inactivation. The photo-generated holes are believed to be responsible for the organic degradation and viral inactivation by the illuminated MIL-53(Fe). [ABSTRACT FROM AUTHOR]

As a new type of porous crystal nanomaterials, metal–organic frameworks (MOFs) have testified potential for various applications, particularly photocatalysis in recent years. However, their photocatalytic applications are still limited due to the rapid recombination rate of charge carriers. In this study, a facile method was developed successfully to greatly boost the sunlight-driven photocatalytic activity of a MOF material (MIL-53(Fe)) by construction of a hybrid with MoSe2 nanoparticles via a facile one-step hydrothermal method. The prepared catalysts were characterized in detail, and their photocatalytic performances were evaluated via degradation of rhodamine B (RhB) and tetracycline (TC). The results revealed that the constructed MIL-53(Fe)/MoSe2 hybrid exhibited tremendously enhanced photocatalytic activity. The optimal MMS-4 photocatalyst displayed the best photocatalytic activity, and its degradation efficiencies for RhB and TC were 13 and 2 times higher than that of pristine MIL-53(Fe), respectively. More interestingly, its photocatalytic performance was much superior to previously reported MIL-53(Fe)-based photocatalysts. The significantly improved catalytic performances are attributed to the formed hybrid with well-matched energy bands which greatly facilitates the transfer and separation of charge carriers, decrease band gap, and increase light absorption. This work presents a new strategy to highly improve the photocatalytic performance of MOF nanomaterials and facilitate their applications for high-efficiency removal of organic pollutants. [ABSTRACT FROM AUTHOR]

MIL-53(Fe) was successfully prepared and deposited on the surface carboxylated polyester (PET) fiber by an optimized conventional solvothermal or industrialized high temperature pressure exhaustion (HTPE) process to develop a PET fiber supported MIL-53(Fe) photocatalyst (MIL-Fe@PET) for the degradation of polyvinyl alcohol (PVA) in water under light emitting diode (LED) visible irradiation. On the basis of several characterizations, MIL-Fe@PET was tested for the photocalytic ability and degradation mechanism. It was found that temperature elevation significantly enhanced the formation and deposition of MIL-53(Fe) with better photocatalytic activity. However, higher temperature than 130°C was not in favor of its photocatalytic activity. Increasing the number of surface carboxyl groups of the modified PET fiber could cause a liner improvement in MIL-53(Fe) loading content and photocatalytic ability. High visible irradiation intensity also dramatically increased photocatalytic ability and PVA degradation efficiency of MIL-Fe@PET. Na 2 S 2 O 8 was used to replace H 2 O 2 as electron acceptor for further promoting PVA degradation in this system. MIL-Fe@PET prepared by HTPE process showed higher MIL-53(Fe) loading content and slightly lower PVA degradation efficiency than that prepared by solvothermal process at the same conditions. These findings provided a practical strategy for the large-scale production of the supported MIL-53(Fe) as a photocatalyst in the future. [Display omitted] [ABSTRACT FROM AUTHOR]

Copyright of Basic Sciences Journal of Textile Universities / Fangzhi Gaoxiao Jichu Kexue Xuebao is the property of Basic Sciences Journal of Textile Universities and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Metal-organic frameworks (MOFs) are commonly utilized for environmental remediation because of their exceptional physicochemical characteristics. This study synthesized GO@MIL-53(Fe) (MFG 2 %) using the solvothermal approach to remove tetracycline from water. The composites were evaluated utilizing several material characterization techniques, including XRD, BET, SEM, etc. The study found that the most effective synthesis of MFG 2 % occurred with a mass ratio of Fe:GO=100:2, a temperature of 150 °C, and a hydrothermal time of 24 h. This resulted in a 91.6 % removal of tetracycline after a 45-minute dark reaction followed by a 75-minute light reaction using a 400 W mercury lamp with a wavelength of 365 nm. In comparison, the degradation rate of tetracycline by MIL-53(Fe) (MFG 0 %) under identical conditions was 75.6 %. Meanwhile, MFG 2 % demonstrated remarkable adsorption-photocatalytic synergism. The enhanced efficiency of MFG 2 % was mostly due to the incorporation of graphene oxide (GO), which expanded the light absorption range of the material. Additionally, the high electrical conductivity of GO enhanced the active site of the photocatalytic reaction and increased the quantum yield. The ESR characterization and quenching studies revealed that three radicals, •O 2 -, h+, and •OH, participated in the degradation procedure. The principal active component is •O 2 -. This paper introduces a novel method for doping modification of MOF-like materials and the breakdown of tetracycline. [Display omitted] • Successful synthesis of GO@MIL-53(Fe) (MFG 2 %) composite catalysts. • Composite catalysts for tetracycline degradation over a wide concentration range. • Good stability and recyclability of composite catalysts. • Composite catalyst has significant adsorption-photocatalytic synergistic effect. • Composite catalyst has good mineralization effect on tetracycline. [ABSTRACT FROM AUTHOR]

Exploiting the highly efficient photocatalyst to achieve the photocatalytic degradation of emerging contaminants is one of the research highlights in the environmental field. Herein, a novel heterostructure FeVO 4 /MIL-53(Fe) (FVOM) was constructed by depositing FeVO 4 nanorods onto the spindle-like MIL-53(Fe). The synthesized heterojunction was characterized by various methods. The photocatalytic properties of FVOM were assessed by the photodegradation of tetracycline with xenon lamp as the light source. The FeVO 4 /MIL-53(Fe) presents exceptional stability and activity. The optimum composites 10 % FVOM show the best photocatalytic activity, realizing 80.5 % of the photodegradation efficiency of TC. The photodegradation rate constant of TC by 10 % FVOM is 0.0103 min−1, which is 3 and 26 folds that by FeVO 4 and MIL-53(Fe), individually. The boosted activity may be attributed to the outstanding visible-light absorption ability of FVOM and the significantly boosted migration and separation of the photo-excited electron-hole pairs resulting from the creation of the heterostructure. Additionally, the activity of 10 % FVOM decreases by only 4.1 % after 4 cycles of reuse, exhibiting excellent stability. The Type-II interfacial charge migration mode of FeVO 4 /MIL-53(Fe) was confirmed in the light of the band structure and the reactive species. The superoxide radical is the predominant active species for the degradation of tetracycline. • A novel heterojunction photocatalyst FeVO 4 /MIL-53(Fe) was reported. • FeVO 4 /MIL-53(Fe) shows superior visible-light response and greatly effective electron transfer. • FeVO 4 /MIL-53(Fe) has excellent photocatalytic activity for the degradation of tetracycline. • The charge transfer way and photocatalytic mechanism in FeVO 4 /MIL-53(Fe) was discussed. [ABSTRACT FROM AUTHOR]

[Display omitted] • Biochar (BC)-supported MIL-53(Fe) was found to be an excellent cathode catalyst. • Biodegradation of salicylic acid (SA) and energy recovery were achieved in MFC. • MFC-MIL-53(Fe)/BC produced 142.2 ± 1.5 mW/m2 of power density (PD) • When the SA concentration of 50 mg/L, the PD was dropped by 1.22-folds. • Four possible SA degradation pathways were proposed. This research was aimed to synthesize waste banana peel biochar (BC) supported MIL-53(Fe) metal–organic framework (MOF) (MIL-53(Fe)/BC) as an efficient cathode catalyst for application in a microbial fuel cell (MFC) for the treatment of salicylic acid (SA)-laden wastewater. This investigation marks the first application of such a catalyst in a MFC for SA degradation. The results revealed an increment in power density of MFC-MIL-53(Fe)/BC by 2.34-folds (142.2 ± 1.5 mW/m2) as compared to MFC-MIL-53(Fe) (60.6 ± 1.8 mW/m2). Removal of chemical oxygen demand in MFC-MIL-53(Fe)/BC (93.8 ± 2.2 %) was found to be comparable to MFC-Pt/C (94.6 ± 1.5 %). The MFC-MIL-53(Fe)/BC demonstrated a 91.5 ± 2.0 % biodegradation of SA. The power recovery per unit cost by MFC-MIL-53(Fe)/BC was found to be 380.21 mW/US$, which is significantly higher than MFC-Pt/C (6.08 mW/US$), indicating that MIL-53(Fe)/BC could be an affordable replacement to pricey Pt as cathode catalyst for efficient oxygen reduction reaction. [ABSTRACT FROM AUTHOR]

The photocatalytic technology based on Metal-Organic Frameworks (MOFs) has shown promising applications in the field of antibiotic pollution control. However, it still faces challenges in efficiently removing high-concentration antibiotic wastewater. A typical Fe-containing MOF, MIL-53(Fe), was successfully synthesized and demonstrated efficient photocatalytic activity under visible light irradiation for high-concentrations of tetracycline hydrochloride (TCH). However, the bare MIL-53(Fe) exhibited unsatisfactory photocatalytic performance. To overcome the low degradation efficiency resulting from the rapid recombination of light-induced electron-hole pairs, H 2 O 2 was introduced as an external electron acceptor to establish a synergistic Fenton-like system to couple with the photocatalysis process. The results showed that in the MIL-53(Fe)/H 2 O 2 /Vis system, 99% of 1 g/L TCH was degraded within 80 min, while the degradation efficiency of the MIL-53(Fe)/Vis process was only 4.89% under identical conditions. The degradation mechanism of the coupling system was performed by radical scavenging experiments and Electron Spin Resonance characterization. The results indicated that ·OH was the dominant radical in the coupled reaction, and ·O 2 - and h+ also played a role in this system. The significant improvement in TCH degradation efficiency during the coupling process was attributed to the following three factors: (1) In the coupling reaction process, photo-generated electrons can stimulate H 2 O 2 to form ·OH radicals, inhibiting the recombination of photo-generated electrons and holes, improving the efficiency of the photocatalytic reaction. (2) FeIII in MIL-53(Fe) can be excited by photo-generated electrons and converted to FeII, which then stimulates H 2 O 2 to form ·OH radicals. (3) FeIII in MIL-53(Fe) can convert with FeII, stimulate H 2 O 2 to form ·OH radicals, and participate in the degradation reaction. In addition, the reusability and stability of the MIL-53(Fe) photocatalyst in the coupled system, as well as the impact of operational parameters, were systematically studied. This work demonstrates a feasible strategy for environmental remediation by enhancing the efficiency of MIL-53(Fe) in photocatalytic Fenton-like systems, thereby providing a viable approach for the treatment of high-concentration antibiotic wastewater. [Display omitted] [ABSTRACT FROM AUTHOR]

This article prepared a series of MIL-53(Fe) implanted carbon spheres derived from resorcinol-formaldehyde resins for rapid adsorption of Ciprofloxacin (CIP) using a facile hydrothermal coupling calcination methodology. Results indicated that MIL53(Fe)@RF-800, which was calcined at 800 °C, demonstrated the highest CIP removal efficiency of up to 95% within 60 min in batch adsorption tests. Moreover, MIL53(Fe) @RF-800 could remove over 95.8% of CIP at an amount of 0.2 mg/L, while both Cl− and HCO 3 − had a negligible impact on the CIP adsorption. It is noteworthy that when there was NO 3 − or SO 4 2− in the solution, the impact of CIP adsorption displayed an inhibitory trend overall. In addition, MIL53(Fe)@RF-800 exhibited a broad pH range adaptability (over 95% CIP removal efficiency at pH = 3.0–10.5), even under highly acidic (pH < 3.0) or alkaline (pH > 10.5) conditions, the adsorption capacity for CIP was greater than 85%. In conclusion, this study provides novel insights into the development of highly porous MIL-53(Fe)-based adsorbent for rapid and pH-unrestricted adsorption of antibiotics and offers the possibility of practical engineering applications. [Display omitted] • MIL-53(Fe) implanted carbon spheres were synthesized for rapid adsorption of antibiotics. • MIL53(Fe)@RF-800 showed excellent pH-adaptability (>95% CIP removal rate at pH = 3.0–10.5). • The adsorbent overcomes the challenge of CIP removal within neutral pH. [ABSTRACT FROM AUTHOR]

Reasonably construct a new type of NiTiO 3 /Fe 2 P to modify porous perovskite materials and use simple high-temperature phosphating treatments. The results showed that the optimal hydrogen production performance of NiTiO 3 /Fe 2 P reached 299.00 μmol in 5 h, which is 3.68 times that of pure Fe 2 P. The existence of metal-organic framework materials as supporting materials facilitates the dispersed growth of NiTiO 3 and Fe 2 P, and avoids the aggregation of nanorods and particles. The introduction of perovskite porous nanorods is the reason for the enhanced light absorption capacity of composite materials. In addition, transition metal phosphide Fe 2 P as a co-catalyst can serve as an electron trapping center to receive electrons from NiTiO 3. Photoluminescence spectroscopy and electrochemical experiments have confirmed that transition metals have good conductivity and can effectively enhance the separation and transfer of carriers. Density functional theory calculations are used to calculate the band structure and density of states of NiTiO 3 and Fe 2 P. In conclusion, this study provides a new idea for improving the photocatalytic activity of perovskite materials by modifying porous nanorod NiTiO 3 with derivatives of MOF materials. [ABSTRACT FROM AUTHOR]

he MIL-53（Fe）/Bi2MoO6 photocatalyst was successfully synthesized by solvothermal method. The crystal structure and morphology of the photocatalyst were analyzed by XRD,SEM and FTIR. Under light irradiation, the effect of MIL-53（Fe）/Bi2MoO6 coupled permonosulfate （PMS） in degradation of acid Orange 7（AO7） in water was studied. The results showed that when the initial concentration of AO7 was 10 mg/L, the PMS concentration was 1 mmol/L, the catalyst dosage was 0.2 g/L, and the pH was 7.6,the degradation rate of AO7 reached 99% after 60 min of light. Free radical quenching experiments proved that the main active species in the light/0.1 MIL-53（Fe）/Bi2MoO6/PMS system is ¹O2.This study can provide an application reference for exploring new heterogeneous catalysts to synergize with PMS to degrade dye wastewater. [ABSTRACT FROM AUTHOR]

[Display omitted] In this study, based on one-step hydrothermal method, boron nitride nanosheets (BNNs) and MIL-53(Fe) composites (BNFe-X) were successfully prepared and the catalytic performance of BNFe-X on persulfate (PS) activation for ibuprofen (IBP) photodegradation was investigated. The introduction of BNNs changed the morphology of MIL-53(Fe) to be a unique prism-like structure and enhanced the degradation efficiency of IBP, which followed the pseudo-first-order rate kinetics. Among the prepared composites, BNFe-3 (3% BNNs) exhibited the highest IBP degradation activity and possessed strong stability after four cycles. Over 99% IBP removal was achieved at the irradiation time of 60 min. The promoted decomposition rate of IBP could be ascribed to be the activation of PS and the enhanced electrons transfer efficiency between BNNs and MIL-53(Fe). The scavenger studies and electron spin-resonance spectroscopy (ESR) demonstrated the generation of SO 2 -, OH and O 2 -, and all these radicals had the different contributions in IBP degradation. Based on the LC-MS-MS and TOC results, the possible decomposition pathways of IBP in BNFe-3/PS system were proposed. This work suggested that the BNNs/Fe-based MOFs composites and PS system had great potential in organic pollutants degradation in aqueous solution. [ABSTRACT FROM AUTHOR]

The application of metal organic frameworks (MOFs) in electrochemical sensing has aroused great interest. However, it is still a great challenge to improve their poor conductivity. Here, we reported a novel phenol electrochemical sensor based on Fe2O3/MIL-53(Fe)/rGO, which was fabricated by the thermal decomposition of MIL-53(Fe). The composition and morphology of Fe2O3/MIL-53(Fe)/rGO were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), SEM, and mapping analysis. Meanwhile, the electrochemical behaviors of phenol on the Fe2O3/MIL-53(Fe)/rGO/GCE were investigated by cyclic voltammetry and linear sweep voltammetry. Under optimized conditions, Fe2O3/MIL-53(Fe)/rGO/GCE had enhanced electrocatalytic activity toward phenol due to the larger surface area and excellent conductivity of the Fe2O3/MIL-53(Fe)/rGO. The electrochemical sensor exhibited a wide linear range (0.5–600 μM) and a low detection limit (0.1 μM) as well as good reproducibility and stability. The proposed sensor has also been applied for the determination of phenol in the refinery wastewater samples with satisfactory results. [ABSTRACT FROM AUTHOR]

Herein, at first, a magnetite@MIL‐53(Fe)‐NH2 core‐shell nanocomposite was fabricated and then modified via postsynthetic modification by dithiocarbamate moieties to obtain a magnetite@MIL‐53(Fe)‐NH‐CS2 nano‐adsorbent. The constructed material was used for extraction/separation of ultra‐trace Hg (II) from seawater, river water, and fish samples, and then the enriched mercury was quantified by CVAAS instrument. Characterization of magnetite@MIL‐53(Fe)‐NH‐CS2 nano‐adsorbent was carried out by scanning electron microscopy, X‐ray diffraction analysis, CHNS analysis, FT‐IR spectroscopy, and magnetometry. Optimization of the affecting variables was conducted via the design of experiment methodology. After that, adsorption isotherms and kinetic studies were carried out. The experimental data were well fitted to the Langmuir and pseudo second‐order kinetic models for adsorption study and kinetic study, respectively. Accordingly, a maximum adsorption capacity and a Langmuir constant (KL) of 250 mg g−1 and 0.102 L mg−1 were obtained, respectively. The LOD and linearity of the preconcentration method were 0.006 ng ml−1 and 0.02–50 ng ml−1 (r2 = 0.9945), respectively. A very high preconcentration factor equal to 300 was attained after optimization. The accuracy of the current method was proved by analyzing IAEA‐436 (Tuna fish flesh homogenate, AQCS) certified reference material. Finally, the current extraction/separation method was employed to the extraction and quantification of ultra‐trace amounts of mercury ions in seawater, river water, and fish samples. [ABSTRACT FROM AUTHOR]

Photocatalysis is usually considered as one of the most effective methods for treating non-biodegradable pollutants commonly found in textile wastewater. In this study, the photocatalyst of g-C3N4/MIL-53(Fe) was synthesized by the hydrothermal method and applied for the removal of Rhodamine B (RhB) in water. The photocatalytic material was characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, Brunauer-Emmett-Teller analysis, UV-Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. The results showed that the g-C3N4 doped MIL-53(Fe) with 97 wt% of MIL-53(Fe) works effectively under visible light and the presence of oxidants (Na2S2O8). RhB removal efficiency can be more than 99% with 20 mg/L of RhB, 300 mg/L of catalyst, 200 mg/L of Na2S2O8, and pH 3. In addition, the photocatalytic degradation mechanism of RhB with g-C3N4/MIL-53(Fe) was also proposed, which could be improved and studied for a wide range of applications in textile wastewater treatment. [ABSTRACT FROM AUTHOR]

At present, tumor markers are becoming an increasingly important factor in the diagnosis and treatment of cancer. In this study, an attractive sandwich-type electrochemiluminescence sensor was established for the monitoring of embryonic antigen (CEA)，on account of the Ru(bpy) 3 2+/PEI luminescence system and the faclitation of PEI by MIL-53 (Fe) metal–organic frameworks. In order to achieve the effect of reducing the leakage of ruthenium bipyridyl (Ru(bpy) 3 2+) and stabilizing the luminescence in the system, a new type of ceria material (m-CeO 2) with large specific surface area and suitable pore size mesoporous structure was used to load Ru(bpy) 3 2+. Interestingly, the face-centered depressed octahedral MIL-53(Fe) was synthesized in this experiment and used to support Polyethyleneimine (PEI), which also promoted the formation of PEI●. More importantly, MIL-53(Fe) can be used as a new co-reaction promoter for PEI to effectively improve the ratio of Ru(bpy) 3 2+/PEI ，due to the large number of Fe-O clusters and the fast recombination of electron and hole pairs. As a result, the sensitive ECL immunosensor for detecting CEA prepared by sandwich immunoreaction can not only reduce the cumbersome operation of adding co-reaction reagents to the bottom solution, but also greatly improve the convenience of operation and the accuracy of detection. The as-prepared ECL biosensor demonstrated in this paper illustrates extremely selective and sensitive determination of CEA from 10−5 ng/mL to 10 ng/mL and the detection limit of 4.04 fg/mL, which is a great contribution to the prevention and treatment of cancer. • As a new type of load material, m-CeO 2 was used to load Ru(bpy) 3 2+. • MIL-53(Fe) was supported PEI and promoted the formation of PEI●. • The mechanism of MIL-53(Fe)-promoted Ru(bpy) 3 2+/PEI luminescence was explored. • The ECL sensors has the advantages of easy operation and wide detection line. [ABSTRACT FROM AUTHOR]

The establishment of heterojunctions was considered as an exceptional strategy to obtain high-efficiency charge separation and enhanced photocatalytic performance. Herein, a series of FePMo/MIL-53(Fe) (FeM-53) heterojunctions were successfully constructed through in-situ growth of FePMo onto MIL-53(Fe) surface and their photocatalytic capacity were examined by visible-light-induced Cr(VI) reduction. Interestingly, the as-fabricated composites offered various photocatalytic activities controllably relying on the mass ratio of FePMo to MIL-53(Fe). Particularly, the one with the 10% ratio displayed the highest Cr(VI) reduction rate (100%) within 75 min, which was respectively over 4 and 2 folds higher than pure FePMo and MIL-53(Fe). The boosted photoactivity might be ascribed to the establishment of S-scheme heterojunction with suitable band alignment between FePMo and MIL-53(Fe), which broadened the light absorption range and improved charge separation. Further mechanism investigations implied both •O 2 − and e− were the key reactive species for Cr(VI) removal. Besides, the composite preserved excellent stability after 4 consecutive tests, and performed well in the presence of organic dyes. Such a S-scheme heterojunction may promise for highly efficient environmental mitigation. [Display omitted] • A novel FePMo/MIL-53(Fe) S-scheme heterojunction was fabricated. • The composite has enhanced visible light absorption and charge separation rate. • Superior activity and stability with Cr(VI) reduction rate of 100% was obtained. • S-scheme heterojunction greatly boosted charge separation and ROS production. [ABSTRACT FROM AUTHOR]

MIL-53(Fe) was prepared and modified with benzoic acid to prepare MIL-53(Fe)-BA additive, which was used to improve the catalytic oxidation rate of sulfite, prevent the scaling of the desulfurization tower, and improve the desulfurization efficiency during the wet flue gas desulfurization (WFGD) process of power plants. MIL-53(Fe)-BA exhibits abundant Lewis acid sites because of the appearance of coordination unsaturated Fe atoms. Due to the excellent sorption capacity, Ca(OH)2 was used as the main SO2 desulfurizer. The composite desulfurizers were prepared by mixing MIL-53(Fe)-based additives and Ca(OH)2, and were characterized by SEM, XRD, and FT-IR. A desulfurization unit was set up at laboratory scale to study the effect of catalytic oxidation additives on sulfite oxidation and desulfurization efficiency. The results showed that the addition of MIL-53(Fe)-BA can increase the oxidation capacity of sulfite by 159%, and greatly improve the desulfurization efficiency. These composite desulfurizers broaden the adaptability of the desulfurizing system to high-sulfur coals, and provide support for improving the desulfurizing efficiency of power plants.

• MIL-53(Fe) was used for in-situ and covalent binding immobilization of HIL and RML. • The support was synthesized in water and at room temperature for the first time. • High enzyme loading was achieved by in-situ immobilization method. • The immobilized lipases showed the broader temperature and pH profiles. • The HIL@MIL-53(Fe) maintained 95 % of its initial activity after 7 catalytic rounds. In this study, the flexible nanoporous MIL-53(Fe) (MIL = Materials of Institute Lavoisier) was used as an efficient support for in-situ and covalent binding immobilization of Humicola insolens lipase (HIL) and Rhizomucour miehei lipase (RML). In the covalent attachment procedure, the support synthesized under ultrasound irradiation was functionalized by N,N -dicyclohexylcarbodiimide and then attached to the enzyme. In the case of in-situ immobilization method, the support was easily synthesized in water and at room temperature by just replacing terephthalic acid with disodium terephthalate. The in-situ approach was very efficient in terms of enzyme loading, resulting in the immobilization of 66 mg and 81 mg · g−1 of RML and HIL, respectively, While in the covalent attachment about 15 mg · g−1 of enzymes were immobilized. Moreover, pH, thermal stability, and reusability of the prepared biocatalysts were investigated. The in-situ immobilization of H. insolens considerably improved its stability compared with covalent attachment even in extreme conditions of temperature (around 100 % of its initial activity at 80 °C) and pH (over 90 % at pH 5 and about 100 % at pH 9) and also allowed the enzyme to be reused up to 7 reaction cycles with more than 90 % residual activity. [ABSTRACT FROM AUTHOR]

• Fe-based metal organic framework (MIL-53(Fe)) was synthesized. • MIL-53 (Fe) showed remarkable stability and durability in MFC cathode. • MIL-53 (Fe) improved oxygen reduction reaction (ORR) and power generation capacity. • Max power density of microbial fuel cell with MIL-53 (Fe) was 397 ± 6.3 mW/m2. To enhance the oxygen reduction reaction (ORR) activity and power generation capacity of a microbial fuel cell (MFC), MIL-53(Fe) (Fe-based Materials of Institute Lavoisier) as the electrochemical catalyst was synthesized using the hydrothermal method. The catalytic structure and morphology of all materials were comprehensively characterized by Fourier Transform infrared spectrometer (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The results show that there were many nanopores on MIL-53(Fe), which improved the electrocatalytic activity. The MIL-53(Fe)-modified air cathode MFC had a voltage output of approximately 0.37 V and maintained that output for one week. The maximum power density was 397 ± 6.3 mW/m2. MIL-53(Fe) was an excellent electrochemical catalyst, significantly enhancing the catalytic oxygen reduction ability and promoting the power output of the MFC. This study provides a method to apply MIL-53(Fe) materials in microbial fuel cells. [ABSTRACT FROM AUTHOR]

The impurity of salicylic acid (SA) in aspirin is a required inspection item for drug quality control. Since free SA is significantly toxic for humans, the content determination of free SA is absolutely necessary to ensure people's health. In this work, a facile colorimetric method was developed for the detection of SA in aspirin by utilizing the MIL-53(Fe) nanozyme. As MIL-53(Fe) possesses enzyme mimicking catalytic activity, 3,3,5,5-tetramethylbenzidine (TMB) can be easily oxidized to blue-oxidized TMB (oxTMB) with the existence of H2O2. Moreover, an inhibition effect on the catalytic activity of the MIL-53(Fe) nanozyme is induced due to the specific complexation between SA and Fe3+ in the center of MIL-53(Fe), which results in a lighter color in the oxTMB. The color change of oxTMB can be seen easily by the naked eye with the addition of different concentrations of SA. Thus, a simple colorimetric platform was established for effectively monitoring SA. A good linear relationship (R2 = 0.9990) was obtained in the concentration range of 0.4–28 μmol L−1, and the detection limit was 0.26 μmol L−1. In particular, the rationally designed system has been well-applied to the detection of SA impurity in aspirin. Satisfyingly, the detection results are highly in accord with those of HPLC. This novel colorimetric platform broadens the application prospects of nanozymes in the field of pharmaceutical analysis.

In this work, the effects of preparation methods such as CE oven, microwave irradiation, and ultrasound on the morphology, particle size and crystallinity of MIL-53(Fe) are firstly investigated. Furthermore, the methods are utilized to prepare Pt NPs@MIL-53(Fe). As a result, well-defined Pt NPs@MIL-53(Fe) prepared by microwave irradiation exhibits uniformed morphology, high crystallinity, and high-disperse Pt NPs, which has been confirmed by FT-IR, TG, N2 adsorption at 77K, TEM and PXRD. Pt NPs@MIL-53(Fe) composite can selectively catalyze the thiophene hydrogenation over nitrobenzene and benzothiophene hydrogenation. The result shows that the sulfur amount can rapidly be reduced to less than 10 ppm and the crystallinity of reacted Pt NPs@MIL-53(Fe) is unchangeable.

• Mn-MIL-53(Fe) was synthesized by one-step solvothermal method. • The obtained Mn-MIL-53(Fe) could efficiently activate peroxymonosulfate (PMS). • Reaction parameters of Mn-MIL-53(Fe)/PMS system for TC degradation were optimized. • Possible mechanism of tetracycline (TC) degradation and TC degradation pathway were investigated proposed. • The Mn-MIL-53(Fe) system exhibited high efficiency in actual water. Herein, Mn-doped MIL-53(Fe) were fabricated via one-pot solvothermal method and used for peroxymonosulfate (PMS) activation towards tetracycline (TC) degradation from aqueous solution. The characterizations of SEM, FTIR and XRD were utilized to reveal the morphology and structure of the materials. The results showed that Mn-MIL-53(Fe)-0.3 displayed the optimal catalytic performance, the removal efficiency of TC could reach 93.2%. Moreover, the catalytic activity of Mn-MIL-53(Fe) towards TC under different initial pH values, co-existing anions (C l - , CO 3 2 - and SO 4 2 - ) and humic acid (HA) were investigated. The results of thermodynamic experiment suggested that the catalytic process was endothermic. In addition, integrated with capture experiments results and the characterization results of electron paramagnetic resonance (EPR), which revealed that SO 4 · - and H O - were the reactive radicals involving in the reaction. More importantly, the possible activation mechanism was discussed in detail based on the X-ray photoelectron spectroscopy results. The active species were generated by the active sites of Fe(II) and Mn(II) on Mn-MIL-53(Fe) effectively activated PMS. Furthermore, the degradation intermediates and possible degradation pathway were investigated by LC-MS. Finally, the catalyst also showed good performance in actual wastewater and demonstrated good recyclability. The Mn-MIL-53(Fe)/PMS system exhibited a promising application prospect for antibiotic-containing waste water treatment. [ABSTRACT FROM AUTHOR]

In this report, we focus on the modification of iron terephthalate metal–organic framework (MIL-53(Fe)) by soaking in H2O2 solution and its mechanism. The structure of MIL-53(Fe) before and after the modification were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), and N2 adsorption–desorption isotherms. The XRD results showed that the material structure changed to amorphous phases and the photocatalytic efficiency was improved after modified by H2O2. The MIL-53 (Fe, H2O2) nanoparticles about 100–300 nm in size was successfully prepared and confirmed by SEM images. In term of UV–Vis DRS results, the absorption spectrum of modified MIL-53(Fe) shifted to higher wavelength and its band gap energy is estimated about 2.2 eV, which is significantly lower than the bandgap value of the conventional material. The impact of the modification on the photocatalytic efficiency was investigated by methylene blue (MB) degradation experiments and photoluminescence (PL) spectroscopy. MB was completely decomposed within 30 min by modified MIL-53(Fe) under optimal conditions. The reaction parameters that affect MB degradation by the as-prepared catalyst were also investigated, including the pH solution, catalyst and H2O2 dosage. [ABSTRACT FROM AUTHOR]

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A novel yolk-shell Ag 3 PO 4 @MIL-53(Fe) Z-scheme photocatalyst was fabricated via a "bottle-around-ship" like method. Experiments on the treatment of tetracycline upon visible light irradiation showed that the as-prepared photocatalyst possessed excellent photocatalytic performance. Experimental results showed that tetracycline removal efficiency of the yolk-shell Ag 3 PO 4 @MIL-53(Fe) Z-scheme photocatalyst was almost 3 times higher than that of MIL-53(Fe). The enhanced photocatalytic performance of Ag 3 PO 4 @MIL-53(Fe) nanocomposite could be contributed to its higher surface area, better absorption capability, and greater charge separation efficiency. In addition, the H 2 O 2 concentration detection results for Ag 3 PO 4 (154 μmol/L) and Ag 3 PO 4 @MIL-53(Fe) (52 μmol/L) indicated that a big part of generated H 2 O 2 on the Ag 3 PO 4 core would be quickly decomposed by the MIL-53(Fe) shell and generated more reactive species through the photo-Fenton-like reaction, which is beneficial for the improvement of photocatalytic performance. This is a promising approach to fabricate yolk-shell structure photocatalyst and a different aspect to design multiple semiconductor composites heterojunction for environmental remediation. [ABSTRACT FROM AUTHOR]

In this study, the efficiency of MIL-53(Fe) metal-organic framework (MOF) the one-pot, three-component reaction of isothiocyanate, aromatic aldehydes and 6-aminouracil and/or N,N -dimethyl-6-aminouracil to form pyrimido[4,5- d ]pyrimidine derivatives is investigated. Using this method all reactions are performed at 110 °C under solvent-free conditions with good to excellent product yields during acceptable reaction times. The other important merit of this method is simple recovery of MIL-53(Fe) through filtration which makes it reusable for further cycles without considerable decrease in its activity. The method is demonstrated to be a truly green process with sustainability and economics. Image 1 • MIL-53(Fe) was characterized by EDX, SEM, TGA, XRD and FT-IR analysis. • The attractive features of this process are high yields, short reaction times, simple workup and environmentally benign procedure. • Use of MIL-53(Fe) inthe multicomponent synthesis of triazolo[1,5- a ]pyrimidinediones. • Reusability of th catalyst. [ABSTRACT FROM AUTHOR]

• MIL-53(Fe) metal organic framework synthesized via hydrothermal route. • Utilization of MIL-53(Fe) for the fluorescence sensing of isoniazid drug. • The fluorescence sensor displayed high sensitivity and selectivity towards detection of isoniazid. • MIL-53(Fe) exhibited LOD value of 0.25 µM in the concentration range of 0.1 to 7.0 µM. Ecosystem and human health can both be catastrophically harmed by overuse of anti-tuberculosis drug, isoniazid. Within this frame of reference, an Fe-based metal organic framework (MIL-53(Fe)) was developed via hydrothermal route to successfully recognise and detect, isoniazid antibiotic, using fluorescence sensing. The structural, morphological and other important property insights of MIL-53(Fe) were gained using various techniques like FT-IR, XRD, FE-SEM, BET, TGA and VSM. The developed fluorescence probe exhibited fluorescence enhancement with the incremental addition of isoniazid antibiotic, in the range of 0.1 to 7.0 µM. The limit of detection (LOD) value was found to be 0.25 µM under optimal sensing conditions. MIL-53(Fe) demonstrated high selectivity and specificity for the detection of isoniazid. In addition, the sensor displayed excellent performance in reproducibility, repeatability and real water studies. [Display omitted] [ABSTRACT FROM AUTHOR]

Y–TiO 2 @MIL-53(Fe) photocatalyst composites were synthesized by a facile solvothermal method and their photocatalytic activity were assessed by photodegradation of tetracycline (TC) under visible light irradiation. Comprehensive material characterization, including XRD, XPS, BET, UV–Vis, SEM, and PL techniques, were employed to analyze the properties of the composites. Experimental results revealed that the removal rates of TC from a 20 mg/L TC solution using Y–TiO 2 , MIL-53(Fe), and Y–TiO 2 @MIL-53(Fe) were 61.0%, 75.1%, and 93.2% respectively, under specific conditions of 500 W UV-Hg lamp irradiation, a 30 min dark reaction, a 60 min light reaction, a Ti:Fe molar ratio of 1:1, and a catalyst concentration of 0.6 g/L. The Y–TiO 2 component in Y–TiO 2 @MIL-53(Fe) primarily existed in the form of anatase, while Fe3+ ions entered the lattice gap or replaced Ti4+ ions at certain lattice positions, effectively inhibiting the recombination of photoelectrons and holes and broadening the light absorption band. This modification positively influenced the photocatalytic ability of the composites. Quenching experiments and ESR characterization confirmed that •O 2 −, •OH, and h+ were the active species involved in the photocatalytic process, with •O 2 − being the main active species. This investigation of the photocatalytic properties of the composites provides valuable insights into the photocatalytic reaction mechanism, supporting the application and further development of photocatalytic technology. • Successfully synthesized doped TiO 2 and MOF composite materials. • The synthesized catalyst achieved a degradation efficiency of 93.2% for tetracycline. • The modified TiO 2 and MOF composite effectively enhances the efficiency, and the doping of metals contributes to certain effects. • The assumed degradation mechanism has been confirmed to a certain extent. [ABSTRACT FROM AUTHOR]

• A coprecipitation method was applied to fabricate BiOBr/MIL-53(Fe) novel photocatalyst. • The MIL-53(Fe) doping endowed BiOBr with the stronger adsorption ability and higher utilization efficiency of visible light. • The heterojunction can be formed between MIL-53(Fe) and BiOBr to enhance the photocatalytic degradation performance. • The degradation pathway of carbamazepine was put forward based on the experimental results. In this work, a series of BiOBr/MIL-53(Fe) hybrid photocatalysts have prepared by a facile co-precipitation method. Rhodamine B (RhB) and carbamazepine (CBZ) were selected as the targets to evaluate the visible-light photocatalytic activity of the prepared samples. All of the hybrids exhibited better catalytic performance compared to the pristine BiOBr, and the performance of BiOBr/MIL-53 (with 20 wt% of MIL-53) was the most efficient. The excellent performance can be contributed to the incorporation of MIL-53(Fe) which not only form the heterojunction with BiOBr to inhibit the recombination of the photoinduced electron-hole pairs, but also utilize the visible light more effectively. The photocatalytic mechanism was studied, it shows that OH and h+ were both the main active species for the degradation of contaminants. Moreover, the degradation pathways of CBZ via the photocatalysis over BiOBr/MIL-53(Fe) hybrid were presented based on the determination of LC–MS/MS and the results of catalytic mechanisms. With the recent increase in reported MOFs materials, we believe a new class of hybrid catalytic materials is possible. This result is conceptually interesting as it opens the door to various MOF-based BiOBr materials for environmental purification and restoration. [ABSTRACT FROM AUTHOR]

Graphical abstract Highlights • The new multifunctional UF membrane with ultrahigh MOF loading of 67% was prepared. • The new membrane showed much better efficiency for MB removal comparatively. • Acceptable ultrafiltration and permeability performance of the new membrane was kept. • The relationship and contribution of adsorption & catalytic oxidation were clarified. • The mechanism of decontamination, ultrafiltration and permeability was proposed. Abstract Multifunctional ultrafiltration membranes need to be further developed with ultrafiltration performance and high multifunctional decontamination efficiency. Here, the MIL-PVDF multifunctional ultrafiltration membrane with ultrahigh MIL loading was demonstrated by a new blending method of predispersion in acetone and thermally induced phase separation. Due to the improved dispersity and restriction of pore size, the MIL-53(Fe) mass loading was as high as approximately 61%. The new membrane showed high performance for methylene blue (MB) removal and maintained high permeability and ultrafiltration efficiency. The characteristics of the membranes were analyzed to explain the above advantages. Meanwhile, compared to the traditional blend ultrafiltration membrane, the 67-MIL-PVDF membrane showed an 9-fold increase in effective treatment volume for more than 75% MB removal. The contribution and efficiency of adsorption and catalytic oxidation were analyzed and explained. The relationship between them was confirmed as being independent, and the reasons for this independence were proposed. Additionally, the mechanism of multifunctional decontamination and permeability by MIL-PVDF membranes was proposed. Moreover, the 67-MIL-PVDF membrane was also suitable for long-term run and real wastewaters treatment. In conclusion, this study sheds new light on the preparation strategy for multifunctional blend ultrafiltration membranes with ultrahigh particles loading displaying high decontamination and permeability performance. [ABSTRACT FROM AUTHOR]