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A luminous Zn-MOF(1), formulated as [Zn 2 (3-DBB) (1,4-bib) 1.5 (Ac)]·H 2 O (3-H 3 DBB ​= ​3-(3,5-dicarboxylato benzyloxy) benzoic acid and 1,4-bib ​= ​1,4-bis (1-imidazoly)benzene) has been prepared hydrothermally. Structural analysis shows that Zn ions linked by 3-DBB3- into 2D brick-wall-like double layer-like structure, further assembling 3D framework by 1,4-bib pillared ligands. The Zn-MOF has been discovered to selectively detect Dy3+ by the luminescent enhancement with the detection limit (LOD) of 1.16 ​× ​10−5 ​M, and is highly selective and sensitive to nitrobenzene (LOD:1.40 ​× ​10−6 ​M) and aniline (LOD:2.03 ​× ​10−7 ​M) as well. The theoretical calculation and absorption spectra results verify the correctness of organic solvents detection. Therefore, the material might be used as a multi-response luminescent sensor. [Display omitted] A luminous 3D Zn-MOF is assembled by the 1,4-bib-pillared ligands with 2D brick-wall-like double layer-like structure and prepared hydrothermally. The Zn-MOF has been discovered to high selectively detect Dy3+, and is highly selective and sensitive to nitrobenzene and aniline as well. The theoretical calculation and absorption spectra results verify the correctness of nitrobenzene detection. Therefore, the Zn-MOF might be used as a multi-response luminescent sensor. • A luminous Zn-MOF based on a flexible 3-(3,5-dicarboxylato benzyloxy) benzoic acid and a long N-donor ligand. • The excellent fluorescent properties of Zn-MOFs in solid state or in aqueous solution. • Highly sensitively detection for Dy3+, and to nitrobenzene and aniline as well in aqueous solution. [ABSTRACT FROM AUTHOR]

Three novel structural diversiform lead(II) complexes, formulated as [Pb(HDBB)(dppz)] (1), [Pb(HDBB)(H 2 O)]·H 2 O(2), [Pb 4 Na(DBB) 3 (o -phen) 3 ](3), have been synthesized under hydrothermal conditions based on 4-(3,5-dicarboxylatobenzyloxy) benzoic acid (H 3 DBB) and two N-donor ligands: dipyrido (3,2-a:2′,3′-c) phenazine (dppz) and 1,10-phenanthroline (o -phen). Structural analyses reveal complex 1 possesses 1D double-helical ladder-like chain sharing a common axis, and then the π···π interactions between adjacent dppz ligands give rise to supramolecular architecture. 2 features 2D (4,4) network based on 1D double-stranded slight helixes chains and the bridging of DBB ligands. For 3 , a 3D framework arises from a hexagonal unit with the trinuclear central groups. The structural diversity from 1D to 3D of these complexes might be attributed to the coordination of auxiliary ligands. Solid-state fluorescence properties for these crystalline materials are also presented. Three novel lead (II) complexes was obtained based on 4-(3,5-dicarboxylatobenzyloxy) benzoic acid and two chelated N-donor ligands under hydrothermal condition. The structural diversity comes from the different coordination fashions of lead ions and DBB3− ligands and the existing of N-donor ligands. All the fluorescence analyses of complexes 1–3 exhibit the ligand-based luminescence. Image 1 • Three novel lead (II) complexes based on 4-(3,5-dicarboxylatobenzyloxy) benzoic acid and two chelated N-donor ligands. • The structural diversity from 1D ladder-like chain, 2D network to 3D framework. • The characteristic luminescence of Pr3+ ion. [ABSTRACT FROM AUTHOR]

Radioactive Cs+ is one of the most dangerous environmental pollutants. It is necessary for radioactive Cs+ management and removal. Titanium-type cesium ion sieve with a strong Ti–O bond has the advantages of structural stability, radiation resistance and no secondary contamination, which is a promising adsorbent material. In this paper, The CTO (Cs 2 Ti 6 O 13) is prepared for the first time by sol-gel and de-templating methods, and cesium ion sieves (HTO/PMMA) are further obtained with diluted HCl elution. Compared with the ionic sieves (HTO) prepared by direct sol-gel method, the adsorption capacity is improved from 224.32 mg/g to 299.15 mg/g. The prepared HTO/PMMA has a larger specific surface area (67.282 m2/g). More exchange sites are provided for the adsorption of Cs ions. Moreover, Adsorption involves the cleavage of O–H bonds and the formation of O–Cs bonds, which is a typical ion exchange reaction. A series of batch experiments are carried out. The results showed that the equilibrium adsorption capacity of HTO/PMMA is 307.69 mg/g and remained high in the interfering ion solution as well (280.38 mg/g). The pseudo second order model and Freundlich model can well describe the ion exchange process. Thermodynamic study shows that adsorption is spontaneous and exothermic, and low temperature is conducive to adsorption in H+- Cs+ exchange system. Finally, the reusability of HTO/PMMA is evaluated. The adsorption capacity did not decrease significantly after 5 cycles of use. Therefore, HTO/PMMA is expected to be an excellent material for recovering radioactive Cs+. [Display omitted] • A novel material (HTO/PMMA) for the Adsorption of Cs+. • The HTO/PMMA has a large specific surface area (67.282 m2/g). • The adsorption mechanism involves the cleavage of O–H bonds and the generation of O–Cs bonds. • The adsorption uptake remains 281.94 mg/g after 5 cycles. [ABSTRACT FROM AUTHOR]

The rational design and preparation of low-cost and visible-light-active catalysts for photodegradation of methylene blue (MB) have been regarded as an efficient way for the utilization of solar energy to address the environmental issues. Herein, in this work, a novel MoS 2 /CdS/Bi 2 MoO 6 ternary Z-scheme heterojunction to be applied in pollutant photodegradation is fabricated via hydrothermal method. Under visible light illumination, the as-prepared 2.4% MoS 2 /CdS/Bi 2 MoO 6 -2.0 composites display desirable photocatalytic activity with removal efficiency of 96.0% towards MB and the total organic carbon removal rate of 73.5% within 120 ​min. The apparent reaction rate constant of 2.4% MoS 2 /CdS/Bi 2 MoO 6 -2.0 (0.0256 min−1) is approximately 16 and 5.2 times higher than those of pure Bi 2 MoO 6 (0.0016 min−1) and CdS (0.0049 min−1), respectively. Meanwhile, the as-prepared ternary photocatalyst possess favorable universality. Combined with a series of characterization results, the enhanced photocatalytic activity of 2.4% MoS 2 /CdS/Bi 2 MoO 6 -2.0 is mainly attributed to the successful formation of the ternary Z-scheme photocatalysts, which could boost the separating/transferring efficiency and reduction/oxidation ability of charge carriers. In addition, the cycling experiments demonstrate that 2.4% MoS 2 /CdS/Bi 2 MoO 6 -2.0 possesses favorable stability and recoverability. Overall, this work put forward a simple strategy for synthesizing visible-light-active ternary Z-scheme photocatalytic materials. MoS 2 /CdS/Bi 2 MoO 6 ternary Z-scheme heterojunction has been successfully prepared via hydrothermal method, which exhibit the greatest photocatalytic activity with 96.0% of MB removal efficiency under visible light illumination. [Display omitted] • Preparation of MoS 2 /CdS/Bi 2 MoO 6 Z-scheme heterojunctions via a hydrothermalmethod • MoS 2 /CdS/Bi 2 MoO 6 heterojunctions inhibit the recombination of photogenerated carries. • MoS 2 /CdS/Bi 2 MoO 6 exhibits high photocataltic degradation efficiency. [ABSTRACT FROM AUTHOR]