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Due to the strong chemical toxicity and radiological hazard, uranium poses long-term threat to both environment and living organisms. However, soluble UO22+ ions with the mobility leads to difficulties in effectively capturing uranium from complex radioactive wastewater. Herein, the efficient U(VI) adsorption is achieved by MQ2-collagen fibers (MoS2-CF; M = Mo, W; Q = S, Se) composite prepared via co-ball milling MQ2 and CF, which exhibit higher uranium adsorption performance with the saturated adsorption capacity (qe) of 301 mg g−1 than pristine MQ2 due to their better hydrophilicity and the advantage of fibrous structure for better UO22+ transfer. The adsorption mechanism is revealed to be the synergistic interaction of abundant S2− sites from MoS2 and amino and carboxyl groups from CF towards UO22+. This work proposes a universal preparation method for low-cost and eco-friendly composite materials combining transition metal dichalcogenide with CF by co-ball milling for efficient uranium adsorption.

A new layered metal sulfide, namely (C6H15N3)1.3(NH4)1.5H1.5In3SnS8 (1, C6H15N3 = N-(2-aminoethyl) piperazine), has been solvothermally synthesized and characterized. Compound 1 crystallizes in the monoclinic space group C2/c. Its structure features a two-dimensional layer of {In3SnS8}n3n− with the (4,4) topology net, which is formed by interlinking supertetrahedral T2 clusters as secondary building units. Band structure calculations revealed that 1 had a band gap of 2.7 eV. The photoelectric response of 1 showed steady and reversible on/off cycles with an "on" state of 121.13 nA cm−2. Moreover, the activation of 1 by replacing the sluggish organic cations with harder K+ ions endowed the material with improved adsorption performances for Sr2+ ions from aqueous solutions. [ABSTRACT FROM AUTHOR]

Two isostructural Co(Cd)-antimony-oxo tartrate cluster-based compounds with a one-dimensional (1-D) belt-like structure, namely H9.2[Co(H2O)6]{M0.5(H2O)3.5{M′(H2O)4[SbVO6[Co4.2(H2O)5Sb III6 (μ3-O)2(tta)6]]}}2·nH2O (M = Co, M′ = Co, n = 9 (1); M = Cd0.39/Co0.61, M′ = Cd0.24/Co0.76, n = 7 (2); H4tta = tartaric acid), have been synthesized by solvothermal methods. It is noteworthy that the relatively rare mixed-valence Sb(III , V) exists in the structures. The anionic clusters in both compounds appear to be in a sandwich configuration; the top and bottom layers are based on {Sb3(μ3-O)(tta)3} brackets, and the intermediate layer is occupied by {SbVO6[Co4.2(H2O)5]}. The title compounds have been characterized by single-crystal X-ray diffraction, powder X-ray diffraction, elemental analyses, thermogravimetric analyses, and UV-Vis spectroscopy. We chose compound 2 as a representative to test its proton conductivity, and the results show that the conductivity can reach 1.42 × 10−3 S cm−1 at 85 °C under 98% relative humidity. [ABSTRACT FROM AUTHOR]