Oxygen vacancies enable the visible light photoactivity of chromium-implanted TiO2 nanowires  

作　　者：Xianyin Song Wenqing Li Xiaojing Liu Yishang Wu Dong He Zunjian Ke Li Cheng Changzhong Jiang Gongming Wang Xiangheng Xiao Yat Li 

机构地区：[1]Department of Physics and Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education,Hubei Nuclear Solid Physics Key Laboratory,Wuhan University,Wuhan 430072,Hubei,China [2]Department of Chemistry,University of Science and Technology of China,Hefei 230026,Anhui,China [3]Department of Chemistry and Biochemistry,University of California,Santa Cruz,CA 95064,United States

出　　处：《Journal of Energy Chemistry》2021年第4期154-161,共8页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(U1867215,11722543,11875211,U1932134);the Suzhou Key Industrial Technology Innovation Project(SYG201828);the Hubei Provincial Natural Science Foundation(2019CFA036);the Fundamental Research Funds for the Central Universities(2042020kf0211);the financial support from the National Science Foundation(U.S.)under grant no.DMR-2003563。

摘　　要：Although computational studies have demonstrated that metal ion doping can effectively narrow the bandgap of TiO_(2),the visible-light photoactivity of metal-doped TiO_(2) photoanodes is still far from satisfactory.Herein,we report an effective strategy to activate the visible-light photoactivity of chromiumimplanted TiO_(2) via the incorporation of oxygen vacancies.The chromium-doped TiO_(2) activated by oxygen vacancies(Cr-TiO_(2)-vac)exhibited an incident photon-to-electron conversion efficiency(IPCE)of~6.8%at450 nm,which is one of the best values reported for metal-doped TiO_(2).Moreover,Cr-TiO_(2)-vac showed no obvious photocurrent decay after 100 h under visible-light illumination.

关 键 词：TiO_(2)nanowires Photoelectrochemical water splitting Chromium implantation Visible-light photoactivity 

分 类 号：TQ116.2[化学工程—无机化工] TQ134.11[一般工业技术—材料科学与工程] TB383.1