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

被引：72
|
作者：
Song, Xianyin [1 ,2 ]
Li, Wenqing [1 ,2 ]
Liu, Xiaojing [3 ]
Wu, Yishang [3 ]
He, Dong [1 ,2 ]
Ke, Zunjian [1 ,2 ]
Cheng, Li [1 ,2 ]
Jiang, Changzhong [1 ,2 ]
Wang, Gongming [3 ]
Xiao, Xiangheng [1 ,2 ]
Li, Yat [4 ]
机构：
[1] Wuhan Univ, Minist Educ, Dept Phys, Wuhan 430072, Hubei, Peoples R China
[2] Wuhan Univ, Hubei Nucl Solid Phys Key Lab, Minist Educ, Key Lab Artificial Micro & Nanostruct, Wuhan 430072, Hubei, Peoples R China
[3] Univ Sci & Technol China, Dept Chem, Hefei 230026, Anhui, Peoples R China
[4] Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA
来源：
JOURNAL OF ENERGY CHEMISTRY | 2021年 / 55卷
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
TiO2; nanowires; Photoelectrochemical water splitting; Chromium implantation; Visible-light photoactivity; HYDROGENATED TITANIUM-DIOXIDE; RUTILE; ANATASE; PHOTOCATALYSIS; ABSORPTION; REDUCTION; DESIGN; ARRAYS;
D O I：
10.1016/j.jechem.2020.07.013
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Although computational studies have demonstrated that metal ion doping can effectively narrow the bandgap of TiO2, the visible-light photoactivity of metal-doped TiO2 photoanodes is still far from satisfactory. Herein, we report an effective strategy to activate the visible-light photoactivity of chromium-implanted TiO2 via the incorporation of oxygen vacancies. The chromium-doped TiO2 activated by oxygen vacancies (Cr-TiO2-vac) exhibited an incident photon-to-electron conversion efficiency (IPCE) of similar to 6.8% at 450 nm, which is one of the best values reported for metal-doped TiO2. Moreover, Cr-TiO2-vac showed no obvious photocurrent decay after 100 h under visible-light illumination. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
引用
收藏
页码：154 / 161
页数：8
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