Homogeneous boron doping in a TiO2 shell supported on a TiB2 core for enhanced photocatalytic water oxidation

被引：21
作者：
Yang, Yongqiang [1 ]
Kang, Yuyang [1 ,2 ]
Liu, Gang [1 ,2 ]
Cheng, Hui-Ming [1 ,3 ,4 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci, Shenyang 110016, Liaoning, Peoples R China
[3] Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen 518055, Guangdong, Peoples R China
[4] King Abdulaziz Univ, Ctr Excellence Environm Studies, Jeddah 21589, Saudi Arabia
来源：
CHINESE JOURNAL OF CATALYSIS | 2018年 / 39卷 / 03期
基金：
美国国家科学基金会;
关键词：
Photocatalysis; O-2; evolution; TiO2; Homogenous doping; VISIBLE-LIGHT ABSORPTION; RUTILE TIO2; HYDROGEN; SURFACE; MICROSPHERES; PREFERENCES; PHOSPHATE; CATALYST; ARRAYS; H-2;
D O I：
10.1016/S1872-2067(18)63043-8
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Photocatalytic water oxidation for O-2 evolution is known as a bottle neck in water splitting. Various strategies have been conducted to keep the energetics of photogenerated holes or to create more holes in the bulk to reach the surface for efficient photocatalytic water oxidation. Our previous study demonstrated the effectiveness of interstitial boron doping in improving photocatalytic water oxidation by lowering the valence band maximum of TiO2 with a concentration gradient of boron. In this study, homogeneous doping of interstitial boron was realized in a TiO2 shell with mixed anatase/rutile phases that was produced by the gaseous hydrolysis of the surface layer of TiB2 crystals in a moist argon atmosphere. Consequently, the homogeneous doping and lowered valence band maximum improved the energetics of holes for efficient photocatalytic water oxidation. (C) 2018, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：431 / 437
页数：7
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