Inorganic chemistry

1520-510X61172022May02Inorganic chemistryInorg ChemDecomposition-Reassembly Synthesis of a Silverton-Type Polyoxometalate 3D Framework: Semiconducting Properties and Photocatalytic Applications.641164206411-642010.1021/acs.inorgchem.1c03928Polyoxometalate-based all-inorganic three-dimensional (3D) frameworks have recently attracted attention as a unique class of materials due to their unique physicochemical properties and a wide field of application with excellent prospects. We herein synthesized a novel all-inorganic 3D framework material based on cobalt-substituted Silverton-type polyoxometalate, H₆{Co₆W₁₀O₄₂[Co(H₂O)₄]₃}·2H₂O (Co₉W₁₀), which was successfully constructed using Na₁₂[WCo₃^II(H₂O)₂(Co^IIW₉O₃₄)₂]·46-48H₂O (Co₅W₁₉) and Co(NO₃)₂·6H₂O as starting materials in a hydrothermal reaction via a decomposition-reassembly route together with the rational adjustment of pH values. Co₉W₁₀ has been structurally characterized using single-crystal X-ray diffraction. Photocurrent response, band-gap (E_g) value, and the VB-XPS spectrum have been measured to reveal the semiconducting property of Co₉W₁₀. Furthermore, we synthesized x% PTh/Co₉W₁₀ composites (PTh = polythiophene, x = 0.5, 1, 2, 5) for photodegradation of tetracycline hydrochloride (TH) to evaluate the photocatalytic activities of title composites. Due to the optimal molar ratio of hybrids and matching energy levels, 2% PTh/Co₉W₁₀ composites show the best photocatalytic activities among these composites.GuoKe-KeKKKey Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China.YangYan-LiYLKey Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China.DongSi-MengSMKey Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China.LiFeng-YanFY0000-0003-0167-4114Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China.JiangXin-YeXYKey Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China.XuLinL0000-0002-8967-919XKey Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China.engJournal Article20220420