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A series of single phase, warm white light emitting phosphors, Gd(PxV1–x)O4:y at% Sm3+, with 1 at% Bi3+ doping concentration were synthesized by high temperature solid state method in this work. The experimental results indicate broadband cyan emission of Bi3+ and characteristic orange-red emission of Sm3+ can be effectively tuned by changing the ratios of PO43−/VO43− in Gd(PxV1–x)O4:1 at% Sm3+,1 at% Bi3+, and the energy transfer process among VO43−, Sm3+, Bi3+ also can be adjusted. Based on this, warm white light emitting can be realized by further optimizing the doping concentration of Sm3+ in the phosphors. At 423 K, the PL intensity of Gd(P0.7V0.3)O4:2 at% Sm3+,1 at% Bi3+ remains ～84.3% of the initial value at 293 K, while the measured quantum efficiency is 67.8%. EL spectrum analysis results of the fabricated white light emitting diode (wLED) based on a 310 nm UV-chip and Gd(P0.7V0.3)O4:2 at% Sm3+,1 at% Bi3+ phosphors imply low correlated color temperature (3132 K) and appropriate color-rending index (Ra = 82.7). These results demonstrate that Gd(P0.7V0.3)O4:2 at% Sm3+,1 at% Bi3+ is a good candidate for manufacturing UV-activated warm white light emitting diodes.

Constructing an artificial cell wall (AFCW) based on the layer-by-layer assembly of polymer films to protect probiotics in harsh conditions is highly desirable. Early findings showed that encapsulating yeast cells by an AFCW improved the cell viability by 50% in antibiotic solution. However, the detailed molecular interaction mechanism remains unclear by experiments. Herein, two ciprofloxacin (CPFX) permeation models, including models 1 and 2 that were, respectively, composed of just the yeast cell membrane and the AFCW coating cell membrane, were investigated by molecular dynamics simulations. The free energy profiles delineating the permeation process of CPFX reveal that the permeation of CPFX through the cell membrane of model 2 is more difficult than through that of model 1. The analysis results show that the AFCW leads to two sharp increases in free energy barriers, amounting to 8.9 and 6.2 kcal/mol, thereby reducing the penetrating rate of CPFX into the cell membrane. Moreover, decomposition of the potentials of mean force into free energy components suggested that the electrostatic interactions of CPFX with the AFCW predominantly contributed to the high free energy barriers. The current results provide a good understanding of the protective mechanism of the self-assembled cell walls against CPFX and help to design other AFCWs.

Mn atoms and oxygen vacancies induce the formation of Ti–Mn–O3 sites by visible light-driven, which further regulates the surface potential, visible-light absorption, and carrier separation, resulting in superior H2 evolution.

A series of single-phase white-emitting phosphors Ba3Bi(PO4)3 (BBP):8 at.% Dy, x at.% Eu were successfully synthesized through high temperature solid-phase method. The luminescence properties of BBP:8 at.% Dy, x at.% Eu were systematically investigated. Experimental results indicate the doping of Eu3+ ions can effectively compensate the red light component in the emission spectrum and tune the correlated color temperature of BBP:8 at.% Dy, x at.% Eu from cool white light (5097 K) to warm white light (3661 K). Moreover, BBP:8 at.% Dy3+, 0.8 at.% Eu3+ phosphor exhibits excellent thermal stability and the fluorescence intensity at 150 °C can still maintain 76% of that at 25 °C, while the activation energy is determined to be ~ 0.23 eV. In addition, the quantum efficiency of BBP:8 at.% Dy3+, 0.8 at.% Eu3+ phosphor were measured to be 61%. These results suggest that BBP:8 at.% Dy3+, 0.8 at.% Eu3+ can be a NUV-pumped single-phase white phosphors with excellent comprehensive performances.

In this work, a combined mechanical activation and FeCl3 (MA + FeCl3) method was applied to pretreat chitin to enhance the degree of hydrothermal carbonization. MA + FeCl3 pretreatment significantly disrupt the crystalline region of chitin and Fe3+ entered into the molecular chain, resulting in the destruction of the stable structure of chitin. The chemical and structural properties of hydrochars were characterized by EA, SEM, FTIR, XRD, XPS, 13C solid state NMR, and N2 adsorption-desorption analyses. The results showed that the H/C and O/C atomic ratios of HC-MAFCT/230 (the hydrochar derived from MA + FeCl3 pretreated chitin with hydrothermal reaction temperature of 230 °C) were 0.96 and 0.34, respectively. Van Krevelen diagram indicated that the hydrothermal carbonization of chitin underwent a series of reactions such as dehydration, decarboxylation, and aromatization. HC-MAFCT/230 had abundant oxygen- and nitrogen-containing functional groups. HC-MAFCT/230 exhibited a porous structure, with the specific surface area of 128 m2 g−1, which was a promising carbon material.

Solvents have been recognized as a significant factor for modulating the shuttle of rotaxanes and regulating their functions regarding molecular machines by a lot of published studies. The mechanism of the effects of solvents on the motion of crown ether/amino rotaxanes, however, remains unclear. In this work, a rotaxane, formed by dibenzo-24-crown-8 (C[8]) and a dumbbell-shaped axle with two positively charged amino groups, was investigated at the atom level. Two-dimensional free-energy landscapes characterizing the conformational change of C[8] and the shuttling motions in chloroform and water were mapped. The results indicated that the barriers in water were evidently lower than those in chloroform. By analyzing the trajectories, there was no obvious steric effect during shuttling. Instead, the main driving force of shuttling was verified from electrostatic interactions, especially strong hydrogen bonding interactions between the axle and water, which resulted in the fast shuttling rate of the rotaxane. All in all, the polarity and hydrogen bond-forming ability of solvents are the main factors in affecting the shuttling rate of a crown ether/amino rotaxane. In addition, C[8] would adopt S-shaped conformations during shuttling except for situating in the amino sites with C-shaped ones adopted due to π-π stacking interactions. The results of this research improve the comprehension of the solvent modulation ability for shuttling in crown ether-based rotaxanes and illustrate the effects of structural modifications on motions. These new insights are expected to serve the efficient design and construction of molecular machines.

Vulvar size and angle are meaningful traits in pig production. Sows with abnormal vulva generally show reproductive disorders. In order to excavate candidate loci and genes associated with pig's vulvar traits, 270 Suhuai pigs with vulvar phenotype were genotyped by a porcine single nucleotide polymorphisms (SNP) Chip. Then, Chip data were imputed using resequenced data of 30 Suhuai pigs as a reference panel. Next, we estimated the heritability and performed a genome-wide association study (GWAS) for vulvar traits. The heritabilities for the traits vulvar length (VL), vulvar width (VW) and vulvar angle (VA) in this pig population were 0.23, 0.32 and 0.22, respectively. GWAS based on Chip data identified nine significant SNPs on the

Under the condition of a strong electric field, partial discharge often occurs when insulated wire is damaged. The recognition of partial discharge is an effective method for the fast and accurate detection of high voltage insulated wire faults. This paper proposes a PD recognition algorithm based on a convolutional neural network and long short-term memory (LSTM). In addition, attention mechanisms are introduced to give separate weights to LSTM hidden states through a mapping, weighting, and learning parameter matrix. This is done to reduce the loss of historical information and to strengthen the influence of important information. The complex relationship between the voltage signal change and the grid operation state response has been established. The proposed method is verified by the ENET data set published by VSB University. The recognition accuracy is 95.16% for no-PD and 94.44% for PD. Results from the proposed algorithm show that this method has a higher detection accuracy.

We report the growth and spectral characteristics of the 0.32 at%Nd3+/1.2 at%Yb3+:YPO4 crystal. Based on AlGaAs LD pumping, the emission of Yb3+ and Nd3+ ions was successfully achieved simultaneously with strong multi-wavelength emission. The potential THz radiation covering 17–21 THz may be generated through difference frequency interactions theoretically.

The preparation of antioxidant starch with the activity of glutathione peroxidase (GPx) for scavenging free radicals can not only enrich the types of modified starch but also alternate native GPx to overcome its drawbacks. In this work, an antioxidant cassava starch (AO-ca-starch) was prepared by the sequential esterification and selenylation of cassava starch. The process was optimized based on the selenium content. Various characterizations for the AO-ca-starch indicated that the catalytic center of GPx, the selenium, was anchored on the starch. The catalytic activity of AO-ca-starch, a starch-based biomimetic GPx, was about 4.95 × 10

Pig hair (PH), a keratinous waste, was modified by ammonium thioglycolate in a ball milling to promote its performance of Hg(II) sequestration. The ball milling broke the hydrophobic cuticle sheath and enhanced the reduction of disulfide bond, which increased the sulfydryl content of the modified PH (BTPH) from 0.07 to 11.05 μmol/g. BTPH exhibited a significantly higher capture capacity of Hg(II) (415.4 mg/g) than PH (3.1 mg/g), as well as the commercial activated carbon (219.7 mg/g), and persisted its performance over a wide range of solution pH. Meanwhile, BTPH with a distribution coefficient of 5.703 × 10

The differences in the macrocyclic structures lead to different flexibilities, and yet the effect of solvents on the conformations is not clear so far. In this work, the conformations of four representational macrocyclic molecules (pillar[5]arene, p-tert-butyl calix[6]arene, benzylic amide macrocycle and dibenzo-18-crown-6) in three solvents with distinct polarity have been studied by all-atom molecular dynamics simulations. The structural features of the macrocycles in the solvents indicate that the conformations are related to the polarity of the solvents and the formation of hydrogen bonds. For the pillar[5]arene, the benzylic amide macrocycle and the dibenzo-18-crown-6, that cannot form intramolecular hydrogen bonds, the polarity of solvents is the major contributing factor in the conformations. The formation of intramolecular hydrogen bonds, in contrast, determinates the conformations of the calix[6]arene. Furthermore, the slight fluctuations of the structures will result in tremendous change of the intramolecular hydrogen bonds of the macrocycles and the intermolecular hydrogen bonds between the macrocycles and the solvents. The current theoretical studies that serve as a basis for the macrocyclic chemistry are valuable for the efficient structural design of the macrocyclic molecules.

Due to the favorable retention power and viscosity, the hydrogel that is loaded with an aqueous detergent, represents a promising cleaning tool for removing the foreign matters such as polymer adhesive, starch paste, and animal glue from paper artworks. However, it is still challenging to eliminate other stains, including organic dyes, commercial drinks, foxing, and mildew. Herein, we present an alternative methodology, translucent hydrogel-containing electrolyte-based electrochemical cleaning (EC), which incorporates electrochemical reactions into the hydrogel-based cleaning process using the extremely tough and translucent alginate/polyacrylamide hydrogel as cathode and PbO2 as anode. The proposed approach is generally applicable to eliminate different stains such as organic dyes, commercial drinks, mildew, and foxing from paper under several mA/cm2 and a few minutes in a small controlled area. For the excellent mechanical strength, the hydrogel electrode can be reused for several times without losing its efficiency and easily peeled-off from paper as one body without any gel residues after cleaning. We further demonstrate the effect of EC on the treated paper, including the morphology, degree of polymerization, crystal structure, and mechanical properties. We conclude that the influence of EC on the paper is slight under the mild treatment.

To effectively dispose and utilize the hazardous waste H2SO4 generated from alkylation, an environmentally friendly and feasible technology for the simultaneous oxidative degradation of organics and consumption of H2SO4 was developed. Pyrolusite, a natural manganese oxide ore, was used for the oxidative degradation and mineralization of the organics, and reduction leaching of Mn from the pyrolusite occurred simultaneously. The total organic carbon (TOC) removal and Mn leaching efficiency were 46% and 16.44%, respectively. In addition, pyrites was applied as a reductant to extract Mn from the pyrolusite, and an Mn leaching efficiency of 98.31% was obtained under the optimized conditions of 4/1 liquid/solid ratio, 350 rpm stirring speed, 1.5 mol L−1 H2SO4 concentration, and 95 °C for 1 h in the first oxidative degradation stage and a molar ratio of FeS2/MnO2 of 0.55/1 for 4 h in the reduction leaching stage. Subsequently, a combined treatment of MnO2/activated carbon was developed for further oxidation and adsorption of the organics in the solution, with the TOC removal of 84.11%. The resulting purified MnSO4 solution was concentrated to produce qualified MnSO4∙H2O, which met the requirements of an industrial product. This technology showed application potential in highly-efficient removal of hazardous organic contaminates.

The interactions between bovine serum albumin (BSA) and polymer (poly (METAC-co-NIPAm-co-Eu(AA)3Phen), PMNEu) containing rare earth element (Europium) were detailedly investigated by both of experi...

Excessive reactive oxygen free radicals (ROS) are the main cause of various oxidative diseases. It is of great significance to develop antioxidant drugs that can intelligently regulate free radical concentrations. The biomimetic simulation of glutathione peroxidase (GPx) can provide an important theoretical basis for the development of antioxidant drugs. In order to explore a simple and efficient strategy for constructing biomimetic GPx, a microgel biomimetic GPx (PNTegel) with temperature responsive catalytic activity was prepared by a one-pot synthesis method. The PNTegel, with typical enzymatic catalytic characteristics, exhibited a maximum catalytic activity at 37 °C (υ0 = 11.51 mM min−1). The investigation of the catalytic mechanism of PNTegel suggested that the binding of different hydrophobic substrates to PNTegel was altered by the change of hydrophobicity of poly(N-isopropylacrylamide) (PNIPAM) in the microgel scaffold of PNTegel during the temperature response process. The change of hydrophobicity was the main factor for regulating the catalytic activity of PNTegel, which resulted in a temperature responsive catalytic behavior of PNTegel. This new strategy for the simple and efficient construction of biomimetic GPx by a one-pot method provides important theoretical support for exploring the preparation of highly effective antioxidant drugs.

Natural organic selenium (Se) has multiple physiological health benefits and has become a hotspot of research in recent years. In this study, the Se-enriched antioxidant peptides were purified from Se-enriched oyster hydrolysate. Three novel Se-enriched antioxidant peptides LLVSeMY (685.2953 Da), MMDSeML (687.1875 Da) and VSeMDSeML (703.1599 Da) were identified from fraction F6-4, which all exhibited strong cellular antioxidant activity (CAA) with EC

In this work, a combined mechanical activation and FeCl

The struggle with "thermal load" is always an unavoidable challenge for photo-luminescent material. In this work, a novel red phosphor of ZnGa2O4: Eu3+ with spinel-type structure is prepared by high-temperature solid-phase method. Due to the charge imbalance during the replacement processes of Ga3+→Zn2+ and Eu3+→Zn2+ in mixed spinel structure, vacancy defects can be introduced into the lattice structure of ZnGa2O4: 0.02Eu3+. The results of Density Function Theory (DFT) calculation demonstrate that the existence of vacancy defects can construct defect energy levels in the energy band structure of the host crystal, which can assist enhancing the fluorescence emission intensity of the phosphor at high temperature. The strong thermal stability of its own structure combined with the assistance of defect energy levels enables the achievement of zero-thermal quenching in ZnGa2O4: 0.02Eu3+ under multi-wavelength excitation. Our results open up a new way for the exploration and utilization of zero-thermal quenching phosphors.

In this work, a user-friendly chitin-based adsorbent (CT-PmPD) was synthesized by in-situ polymerization of m-phenylenediamine on chitin bead, which could effectively remove Cr(VI) from water. The structure and morphology of the CT-PmPD were characterized by FT-IR, XRD, SEM, zeta potential and XPS. Specifically, the effect of adsorbed dosage, pH, contact time, adsorption temperature and coexisting salt on the adsorption of Cr(VI) were studied. Besides, the adsorption mechanism of CT-PmPD toward Cr(VI) were also analyzed. Consequenlty, CT-PmPD exhibited a monolayer adsorption and the Langmuir model fitted a Cr(VI) adsorption capacity reaching 185.4 mg/g at 298 K. The high adsorption capacity was attributed to the abundant amino groups of CT-PmPD, which could be protonated to boost the electrostatic attraction of Cr(VI) oxyanions, thus providing electron to reduce Cr(VI). Additionally, the CT-PmPD revealed a good regeneration and reusability capacity, maintaining most of its adsorption capacity even after five cycles of adsorption-desorption. This high adsorption capacity and excellent regeneration performance highlighted the great potential of CT-PmPD for the removal of Cr(VI).

The pollution of antibiotics in aquaculture environment is increasingly serious, and excessive antibiotics will kill the probiotics in aquaculture feed. How to improve the viability of probiotics in the antibiotics-contaminated environment is of significance. In this study, a new strategy for protecting Saccharomyces cerevisiae cells in situ against antibiotics is constructed based on cell surface engineering technology by putting on wearable protective layers for cells. The protective layer is constructed around cellular surface via the self-assembly of coacervate microdroplets that consist of carboxymethyl chitosan and carboxyl dextran. Without affecting the cell viability, the protective layer can grasp ciprofloxacin and decrease the contact of ciprofloxacin to cells and consequently improve the survival rate of cells when exposing to ciprofloxacin. This work highlights a facile strategy to establish removable artificial cell wall by biodegradable polysaccharides for improving the productivity of probiotics in antibiotic environments.

High quantum efficiency and thermal stability have always been the goals to pursue and challenges for lighting application. In this work, sunlight-like white emission has been achieved in a new prepared single phased Rb2CaP2O7: 0.005Ce3+, 0.01Eu2+ phosphor, which exhibits high internal quantum efficiency (IQE = 74.36%), external (EQE = 56.77%) quantum efficiency and excellent thermal stability. Based on the broadband emission from 4f-5d transitions of Ce3+/Eu2+ ions and high energy transfer efficiency of Ce3+→Eu2+ (measured up to 60%), the extremely wide color-tunable emission from blue-violet to white and then to orange-yellow is realized in Rb2CaP2O7: 0.005Ce3+, xEu2+ phosphors. Moreover, a prototype WLED device is packaged by combing the prepared Ra2CaP2O7: 0.005Ce3+, 0.01Eu2+ white phosphors with an UV LED chip (λ = 310 nm), and the obtained WLED emits bright sunlight-like white light with color coordinates of (0.377, 0.324). The correlated color temperature (CCT) and the color rendering index (CRI) value of the WLED are 3208 K and 88.4, respectively. These results can provide effective guidance for the design of color-tunable single-phase white phosphors with high luminous efficacy and thermal stability.

Two new cobalt phosphite–oxalates, formulated as Co2(H2PO3)2(C2O4)3(C6N2H16)2 (1) and Co2(H2PO3)2(C2O4)2(C6N2H16) (2), have been synthesized under solvent-free conditions. Single-crystal X-ray diffraction analysis reveals that compound 1 has a 1D chain-like structure decorated with phosphite groups. It is noted that there are two coordination modes of oxalate ligands in the structure. Compound 2 is a 2D distorted honeycomb-like layered open-framework structure with 12-membered ring windows. Notably, compound 2 possesses room temperature proton conductivity. Extensive hydrogen bonds existing between the host framework and guest part play an important role as proton-conducting pathways.

In this work, a new series of non-rare earth doped Ba2Y5B5O17: x at.% Sb3+ (BYBO: x at.% Sb) blue light phosphors were synthesized by high temperature solid state method. The structural analysis supported that Sb3+ can occupy four different kinds of lattice sites in BYBO crystal structure. By selecting the excitation conditions for Sb3+ ions at different lattice sites, a wide range of emission wavelength tuning exceeding 100 nm can be achieved. Our experimental results demonstrated that, by using 370 nm near-ultraviolet (n-UV) light to excite the Sb3+ ions at the Y4 (Sb1) lattice occupancy in BYBO: 3 at.% Sb, the blue light emission can be realized. White light emitting diode (wLED) was fabricated by combining 370 nm n-UV chip with purchased (Sr, Ba)2SiO4: Eu, (Sr, Ca)AlSiN3: Eu and synthesized BYBO: 3 at.% Sb phosphor. From the measured electroluminescence (EL) spectrum of the packaged wLED, the correlated color temperature (CCT) and color rendering index (CRI) were calculated to be 3816 K and 91.25, respectively. These results indicated that BYBO: 3 at.% Sb can serve as excellent blue phosphor for preparing n-UV excited wLED with low CCT and high CRI value.

Chitin is difficult to be dissolved due to its dense structure, high crystallinity, and acetyl groups. Amorphization is conducive to enhancing the solubility of chitin. In this study, an effective mechanical activation-metal salt (MAMS) technology was used to pretreat α-chitin to improve its solubility in NaOH/urea solution. The chlorides of Fe and Al showed better synergistic effect with MA, especially FeCl3. The crystallization index of MA-FeCl3-pretreated chitin (MAFCCT) decreased to 4%, attributing to that Fe3+ and Cl- jointly disrupted the intra- and intermolecular-hydrogen bonds in chitin. In addition, during the dissolution of MAFCCT, Fe3+ fixed on chitin could form Fe(OH)3 colloid with OH– to induce NaOH enter the interior of chitin molecules. The solubility of MAFCCT in NaOH/urea solution at −16 °C for 8 h reached 97.1%. MAMS pretreatment is a practical technology to enhance the solubility of chitin by destroying its stable crystal structure.

A single-phased warm white phosphor of α-Sr2V1.98P0.02O7: 0.5 % Eu3+ with low correlated color temperature (CCT) and high color rendering index (CRI) was synthesized by high temperature solid phase method. By changing the ratio of PO43−/VO43−, the emission intensity of VO43− and the energy transfer efficiency of VO43−→Eu3+ can be effectively tuned, and the full-spectrum warm white light emission of phosphors in the range of 400−700 nm can be realized. Moreover, the temperature-dependent emission spectra and thermal quenching properties were investigated in detail. On this basis, the WLED prototype devices were packaged with the synthesized phosphors α-Sr2V1.98P0.02O7: 0.5 % Eu3+ and 365 nm near-ultraviolet (NUV) chips and high-quality warm white light emission with CCT = 3188 K and CRI Ra = 93.5 were achieved. These findings provide new insights into exploring single-phased white phosphors for NUV-pumped warm w-LEDs with high CRI property and low CCT value.

As a promising candidate of Cr(VI) decontamination, cellulose is limited in the Cr(VI) uptake due to its poor accessibility. Herein, We describe the synthesis of a novel cellulose-based adsorbent (PQC, where P and QC designate the polyethylenimine and quaternized cellulose, respectively) with functional groups of quaternary ammonium and amino for enhanced capture of Cr(VI) from water. For preparing PQC, cellulose is first quaternized homogeneously, followed by grafting and/or cross-linking with polyethylenimine in the presence of epichlorohydrin. The PQC follows the Langmuir isotherm and presents a maximum Cr(VI) uptake capacity of 490.3 mg/g at 30 °C and initial pH about 2.0, much higher than many other reported cellulose-based adsorbents. The adsorption of PQC is spontaneous and endothermic, which follows the pseudo-second-order kinetic model and achieves the equilibrium after contacting about 50 min. Furthermore, the PQC, with favorable reusability, can work well in a high coexisting anion concentration. These excellent absorption performances are attributed to its physicochemical properties such as the robust porous structure and high density of functional groups including quaternary ammonium, amino and hydroxyl, which improve the availability to capture or reduce Cr(VI). This work demonstrates the significant potential of cellulose-based adsorbent for remediating aqueous Cr(VI).

In the presence of the amino acid histidine, an inorganic–organic hybrid metal sulfite, Zn2(SO3)2(C6N3O2H9)2·H2O (1), has been prepared under hydrothermal conditions. Single-crystal X-ray diffraction analysis reveals that 1 shows a 2D layer framework built up from a classical second building unit (S4R), and bridged histidine molecule. Notably, it is the first report of a metal sulfite in the presence of an amino acid molecule. A 1D H-bonding array can be constructed by the H-bonding interaction between histidine molecules and sulfite groups. Moreover, a new function of metal sulfite for proton conduction was investigated by alternating-current impedance analysis. The results demonstrate that compound 1 shows a high proton conductivity of approximately 10−3 S cm−1 at 348 K and 98% relative humidity.

The Er3+:YPO4 crystal was grown successfully from Pb2P2O7 solution by the high-temperature solution method. The crystal growth, structures, polarization absorption spectra, polarization fluorescence spectra and lifetime of the grown crystal were discussed in detail. The absorption cross-sections at around 524 nm are 2.93 × 10−20 cm2 for σ-polarizations and 3.19 × 10−20 cm2 for π-polarizations, respectively. Based on Judd-Ofelt theory, the line strength, Judd-Ofelt intensity, spontaneous transition rates, fluorescence branching ratios and radiative lifetime were calculated systematically. Four strong emission peaks with central wavelength at 1505, 1538, 1562 and 1586 nm were observed in the polarized fluorescence spectra. And the emission cross-sections corresponding to these emission peaks range from 0.99 × 10−20 cm2 to 1.66 × 10−20 cm2. The results show that Er3+:YPO4 crystal is a potential laser material applied to 1.5–1.6 μm. Moreover, different frequency interactions between these wavelengths may be used to generate radiation in the range of 2.9–10.2 THz theoretically.

We synthesized oil-in-water Pickering medium internal phase emulsions (MIPEs) based on (1) natural, unmodified montmorillonite (MMT) nanoparticles as a stabilizer; (2) a trace quantity of Tween-20 (T-20) as a co-stabilizer; and (3) eco-friendly flaxseed oil as the continuous phase. We modulated the stability, rheological properties, and droplet size of the emulsion by adjusting the MMT concentration, Tween-20 concentration, and oil phase volume fraction. We used these emulsions as templates to prepare a macroporous monolithic adsorbent [poly (carboxymethylcellulose-g-acrylamide); PCAM] with a hierarchical pore structure and excellent connectivity that approximates materials derived from Pickering high internal phase emulsions (HIPEs). Even when we decreased the internal phase volume fraction to 30%, there were still interconnecting pores in the material. Compared with Pickering HIPEs, our approach reduced the oil phase volume fraction substantially (approximately 45%), which lowered the production cost of the emulsion. Our Pickering MIPE-derived macroporous monolithic material effectively adsorbed cationic dyes (methyl violet and methylene blue) from water. Our environmentally friendly method of preparing Pickering MIPEs will enable researchers to prepare absorbents with an excellent hierarchical pore structure, which will facilitate rapid mass transport and increased greater specific surface area.