title: Graphene oxide coated coordination polymer nanobelt composite material: a new type of visible light active and highly efficient photocatalyst for Cr(VI) reduction.
abstract: A visible light active photocatalyst was synthesized successfully by coating graphene oxide (GO) on a coordination polymer nanobelt (CPNB) using a simple colloidal blending process. Compared with neat CPNB, the resulting graphene oxide coated coordination polymer nanobelt composite material (GO/CPNB) exhibits excellent photocatalytic efficiency in the reduction of K2Cr2O7 under visible light irradiation. In the composite material, GO performs two functions. Firstly, it cuts down the band gap (E(g)) of the photocatalyst and extends its photoresponse region from the ultraviolet to visible light region. Secondly, GO exhibits excellent electron transportation ability that impedes its recombination with holes, and this can enhance photocatalytic efficiency. For GO, on its surface, the number of functional groups has a great influence on the photocatalytic performance of the resulting GO/CPNB composite material and an ideal GO"coater" to obtain a highly efficient GO/CPNB photocatalyst has been obtained. As a photocatalyst that may be used in the treatment of Cr(VI) in wastewater, GO/CPNB exhibited outstanding stability during the reduction of this pollutant.
authors.affiliation: College of Science, Shenyang University of Technology, No.111, Shenliao West Road, Economic & Technological Development Zone, Shenyang, 110870, P. R. China. gmshi@imr.ac.cn.
authors.forename: Gui-Mei
authors.initials: GM
authors.lastname: Shi
authors.forename: Bin
authors.initials: B
authors.lastname: Zhang
authors.forename: Xin-Xin
authors.initials: XX
authors.lastname: Xu
authors.forename: Yan-Hong
authors.initials: YH
authors.lastname: Fu
mesh_terms: D002274:Carcinogens, Environmental / Q000737:chemistry* / Q000302:isolation & purification; D002384:Catalysis; D002857:Chromium / Q000737:chemistry* / Q000302:isolation & purification; D006108:Graphite / Q000737:chemistry*; D008027:Light; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D055668:Photochemical Processes; D011108:Polymers / Q000737:chemistry*; D011192:Potassium Dichromate / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D002274:Carcinogens, Environmental; D010087:Oxides; D011108:Polymers; D002857:Chromium; C074702:chromium hexavalent ion; D006108:Graphite; D011192:Potassium Dichromate