title: Synergistic photoelectrochemical reduction of Cr(VI) and oxidation of organic pollutants by g-C3N4/TiO2-NTs electrodes.
abstract: The g-C3N4/TiO2-NTs electrodes were synthesized by a dip-coating procedure followed by high-temperature annealing used in photoelectrochemical process. From the results, a simultaneous and rapid reduction of Cr(VI) and degradation of phenol in Cr(VI)/phenol system was observed with photoelectrocatalytic activity under UV-visible light irradiation than photocatalytic and electrocatalytic activities. The different kinds of Cr(VI)/organic pollutants systems were also investigated systematically. In addition, different scavengers were also added in Cr(VI)/phenol and Cr(VI)/benzyl alcohol systems to indicate that the hydroxyl radicals and superoxide radicals were the most major active species for the denomination of Cr(VI) and organic pollutants. The intermediates of phenol and benzyl alcohol were also detected during the reaction in order to deduce the photoelectrocatalysis mechanism underg-C3N4/TiO2-NTs electrodes that the charge separation was improved and subsequently electron-transfer efficiency was higher.
authors.affiliation: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wang
authors.affiliation: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China.
authors.forename: Jiani
authors.initials: J
authors.lastname: Lu
authors.affiliation: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
authors.affiliation: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China. Electronic address: yqcong@zjgsu.edu.cn.
authors.forename: Yanqing
authors.initials: Y
authors.lastname: Cong
mesh_terms: D002384:Catalysis; D002857:Chromium / Q000737:chemistry*; D055664:Electrochemical Techniques; D004566:Electrodes; D008027:Light; D009570:Nitriles / Q000737:chemistry; D010084:Oxidation-Reduction; D019800:Phenol; D010636:Phenols; D055668:Photochemical Processes; D014025:Titanium / Q000737:chemistry
chemical_list: D009570:Nitriles; D010636:Phenols; D002857:Chromium; C009495:titanium dioxide; C074702:chromium hexavalent ion; D019800:Phenol; C011206:cyanogen; D014025:Titanium
keywords: Organic pollutants species; Photoelectrocatalysis; Reduction of Cr(VI); Synergistic; g-C(3)N(4)/TiO(2) nanotubes