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

页码：154 / 161

页数：8

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