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

doi:10.1016/S1872-2067(18)63043-8

Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (3): 431-437.DOI: 10.1016/S1872-2067(18)63043-8

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

Yongqiang Yang^a, Yuyang Kang^a,b, Gang Liu^a,b, Hui-Ming Cheng^a,c,d

a Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China;
b School of Materials Science, University of Science and Technology of China, Shenyang 110016, Liaoning, China;
c Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, Guangdong, China;
d Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah 21589, Saudi Arabia

Received:2018-02-01 Revised:2018-02-03 Online:2018-03-18 Published:2018-03-10
Contact: 10.1016/S1872-2067(18)63043-8
Supported by:
This work was supported by the National Science Foundation of China (51702327, 51521091), the Major Basic Research Program, Ministry of Science and Technology of China (2014CB239401), the Key Research Program of Frontier Sciences CAS (QYZDB-SSW-JSC039), the awards of the IMR SYNL-T.S. Kê Research Fellowship, and the Newton Advanced Fellowship.

Abstract

Abstract:

Photocatalytic water oxidation for O₂ 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.

Key words: Photocatalysis, O₂ evolution, TiO₂, Homogenous doping

Yongqiang Yang, Yuyang Kang, Gang Liu, Hui-Ming Cheng. Homogeneous boron doping in a TiO₂ shell supported on a TiB₂ core for enhanced photocatalytic water oxidation[J]. Chinese Journal of Catalysis, 2018, 39(3): 431-437.

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

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