Insights into the effects of surface/bulk defects on photocatalytic hydrogen evolution over TiO2 with exposed {001} facets

doi:10.1016/j.apcatb.2017.08.046

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	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
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2018
卷号	220 页码:126-136
关键词	Anatase Tio2 Titanium-dioxide Phase-transformation Black Tio2 Nanocrystals Disorder Water Bulk Nanoparticles Nanomaterials
ISSN号	0926-3373
DOI	10.1016/j.apcatb.2017.08.046
文献子类	期刊论文
英文摘要	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.
语种	英语
WOS记录号	WOS:000412957200013
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/29051]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017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
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.