title: Efficient photocatalytic reduction of aqueous Cr(VI) over flower-like SnIn4S8 microspheres under visible light illumination.
abstract: Photocatalytic reduction of aqueous Cr(VI) was successfully achieved on nanostructured SnIn(4)S(8). The SnIn(4)S(8) particles with flower-like nanostructure were synthesized via a facile solvothermal method. UV-vis diffuse reflectance spectra (DRS) indicated that the SnIn(4)S(8) particles had strong absorption in visible region and the band gap was estimated to be from 2.27 to 2.35 eV. The photocatalytic reduction of aqueous Cr(VI) by flower-like SnIn(4)S(8) was evaluated under visible light (λ>400 nm) irradiation. The polyvinyl pyrrolidone (PVP) assisted SnIn(4)S(8) sample exhibits excellent removal efficiency of Cr(VI) (~97%) and good photocatalytic stability. The predominant photocatalytic activity is due to its large surface area, strong absorption in visible-light region and excellent charge separation characteristics.
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Wang
authors.forename: Xinyong
authors.initials: X
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Teng
authors.forename: Qidong
authors.initials: Q
authors.lastname: Zhao
authors.forename: Yong
authors.initials: Y
authors.lastname: Shi
authors.forename: Renliang
authors.initials: R
authors.lastname: Yue
authors.forename: Yunfa
authors.initials: Y
authors.lastname: Chen
mesh_terms: D002384:Catalysis; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D002857:Chromium / Q000737:chemistry* / Q000528:radiation effects; D007204:Indium / Q000737:chemistry* / Q000528:radiation effects; D008027:Light; D008863:Microspheres; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D016062:Porosity; D011205:Povidone / Q000737:chemistry; D013440:Sulfides / Q000737:chemistry* / Q000528:radiation effects; D013501:Surface-Active Agents / Q000737:chemistry; D017971:Tin Compounds / Q000737:chemistry* / Q000528:radiation effects; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D002593:Cetrimonium Compounds; D013440:Sulfides; D013501:Surface-Active Agents; D017971:Tin Compounds; D014874:Water Pollutants, Chemical; D007204:Indium; D002857:Chromium; C074702:chromium hexavalent ion; D011205:Povidone; D000077286:Cetrimonium