title: Influence of the electronic structures on the heterogeneous photoelectrocatalytic performance of Ti/RuxSn1-xO2electrodes.
abstract: DSA-type Ti/RuxSn1-xO2electrodes were prepared by thermal decomposition method as photoelectrocatalysts (PECs) and extensively characterized by various sophisticated techniques. First-principles calculations was employed to study the effects of Ru content on the electronic structures of the RuxSn1-xO2coatings. The photoelectric-synergistic catalytic activity of the Ti/RuxSn1-xO2electrodes was evaluated for the degradation of methyl orange (MO) in aqueous solution. The results show that the RuO2-SnO2solid solution could be formed. The band gaps of the RuxSn1-xO2coatings gradually decreased and eventually turned into metallic conductivity with the increase of ruthenium content. As a PEC electrode, reducing band gap is helpful to improve electronic conductivity and the electrocatalytic activity, but not always advantageous to increase the photocatalytic activity. Because too narrow band gap will sacrifice the photogenerated charge carriers and thus reduce photocatalytic activity of the electrode. In our experiments, the rate constant of Ti/Ru0.05Sn0.95O2electrode increased with increasing Ru content and exhibited the maximum rate for 5% Ru loading. The stability test showed the photoelectrocatalytic activity of the Ti/Ru0.05Sn0.95O2electrode almost had no attenuation after 100h photoelectrolysis, revealing that this electrode has good long-term stability.
authors.affiliation: College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China. Electronic address: 1061739408@qq.com.
authors.forename: Zhijie
authors.initials: Z
authors.lastname: Chen
authors.affiliation: School of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou, Fujian 362000, China. Electronic address: zhujunqiu@xmut.edu.com.
authors.forename: Junqiu
authors.initials: J
authors.lastname: Zhu
authors.affiliation: College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China. Electronic address: 601314274@qq.com.
authors.forename: Shuai
authors.initials: S
authors.lastname: Zhang
authors.affiliation: College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China. Electronic address: yqshao1989@163.com.
authors.forename: Yanqun
authors.initials: Y
authors.lastname: Shao
authors.affiliation: Electric Power Research Institute of State Grid Fujian Electric Power Co. Ltd., Fuzhou 350007, China. Electronic address: lindeyuan_fj@126.com.
authors.forename: Deyuan
authors.initials: D
authors.lastname: Lin
authors.affiliation: College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China. Electronic address: 1277018923@qq.com.
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Electric Power Research Institute of State Grid Fujian Electric Power Co. Ltd., Fuzhou 350007, China. Electronic address: rogerchen@163.com.
authors.forename: Yunxiang
authors.initials: Y
authors.lastname: Chen
authors.affiliation: College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China. Electronic address: diantang@fzu.edu.cn.
authors.forename: Dian
authors.initials: D
authors.lastname: Tang
keywords: Electronic structure; First-principles calculation; Photoelectric-synergistic catalytic; Ti/Ru(x)Sn(1-x)O(2) electrode; Water treatment