Insights into the effects of surface/bulk defects on photocatalytic hydrogen evolution over TiO2 with exposed {001} facets
Zhang, H; Cai, JM; Wang, YT; Wu, MQ; Meng, M; Tian, Y; Li, XG; Zhang, J; Zheng, LR; Jiang, Z; Gong, JL
2018
发表期刊APPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
卷号220页码:126-136
文章类型期刊论文
摘要This paper describes the effects of defect distribution on energy band structure and the subsequent photo catalytic activity over TiO2 with exposed {001} facets as the model catalyst. Our results show that only surface oxygen vacancies (V-o's) and Ti3+ centers in TiO2 can be induced by hydrogenation treatment, whereas the generation of bulk Vo's and Ti3+ species depends on the thermal treatment in nitrogen. Both the surface and bulk defects in TiO2 can promote the separation of electron-hole pairs, enhance the light absorption, and increase the donor density. The presence of surface and bulk defects in TiO2 can not change the valence band maximum, but determine the conduction band minimum. Surface defects in TiO2 induce a tail of conduction band located above the H+/H-2 redox potential, which benefits the photocatalytic performance. However, bulk defects in TiO2 generate a band tail below the H+/H-2 potential, which inhibits hydrogen production. Thus, the change of band gap structure by defects is the major factor to determine the photocatalytic activity of TiO2 for hydrogen evolution. It is a new insight into the rational design and controllable synthesis of defect-engineered materials for various catalytic processes.
关键词Anatase Tio2 Titanium-dioxide Phase-transformation Black Tio2 Nanocrystals Disorder Water Bulk Nanoparticles Nanomaterials
DOI10.1016/j.apcatb.2017.08.046
收录类别SCI
语种英语
WOS记录号WOS:000412957200013
引用统计
被引频次:18[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/29051
专题中科院上海应用物理研究所2011-2018年
作者单位1.Zhang, H
2.Cai, JM
3.Wang, YT
4.Wu, MQ
5.Meng, M
6.Tian, Y
7.Li, XG
8.Zhang, J
9.Zheng, LR
10.Jiang, Z
11.Gong, JL
推荐引用方式
GB/T 7714
Zhang, H,Cai, JM,Wang, YT,et al. Insights into the effects of surface/bulk defects on photocatalytic hydrogen evolution over TiO2 with exposed {001} facets[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,220:126-136.
APA Zhang, H.,Cai, JM.,Wang, YT.,Wu, MQ.,Meng, M.,...&Gong, JL.(2018).Insights into the effects of surface/bulk defects on photocatalytic hydrogen evolution over TiO2 with exposed {001} facets.APPLIED CATALYSIS B-ENVIRONMENTAL,220,126-136.
MLA Zhang, H,et al."Insights into the effects of surface/bulk defects on photocatalytic hydrogen evolution over TiO2 with exposed {001} facets".APPLIED CATALYSIS B-ENVIRONMENTAL 220(2018):126-136.
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