Surface-reduced Si-doped TiO2 nanotubes for high-efficiency photoelectrochemical water splitting

doi:10.1142/S1793604719400046

	Surface-reduced Si-doped TiO2 nanotubes for high-efficiency photoelectrochemical water splitting
	Si, Dawei; Dong, Zhenbiao; Li, Ting; Ding, Dongyan; Ning, Congqin
刊名	FUNCTIONAL MATERIALS LETTERS
	2019-12-30
卷号	12 期号:6
关键词	TiO2 nanotubes Si-doping NaBH4 reduction water splitting
ISSN号	1793-6047
DOI	10.1142/S1793604719400046
文献子类	Article
英文摘要	TiO2 is a promising photocatalyst in the reaction of water splitting for hydrogen. Here, we used NaBH4 reduction reaction to introduce Ti3+/V-O defect states into Si-doped TiO2 nanotubes and investigated the photoelectrochemical water splitting properties. It was found that the photocatalytic activity was improved through NaBH4 reduction because of the existence of Ti3+/V-O. The defect states (Ti3+/V-O) could play a role of capture trap and accelerate the separation of photogenerated electrons and holes. The photocurrent density of the Si-doped TiO2 nanotubes reduced for 3 h was 1.5 mA/cm(2) compared to 0.7 mA/cm(2) of the unreduced nanotubes. The conversion efficiency was 0.7%, which was almost 4 times than that of pure TiO2. On the other hand, reduction for a long time would generate excess defect states and thus cause the decrease of photocurrent density. Excess defect states could act as the recombination centers of photogenerated electrons and holes.
WOS关键词	VISIBLE-LIGHT ABSORPTION ; PHOTOANODE ; ARRAYS
WOS研究方向	Materials Science
语种	英语
出版者	WORLD SCIENTIFIC PUBL CO PTE LTD
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/27457]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Si, Dawei,Dong, Zhenbiao,Li, Ting,et al. Surface-reduced Si-doped TiO2 nanotubes for high-efficiency photoelectrochemical water splitting[J]. FUNCTIONAL MATERIALS LETTERS,2019,12(6).
APA	Si, Dawei,Dong, Zhenbiao,Li, Ting,Ding, Dongyan,&Ning, Congqin.(2019).Surface-reduced Si-doped TiO2 nanotubes for high-efficiency photoelectrochemical water splitting.FUNCTIONAL MATERIALS LETTERS,12(6).
MLA	Si, Dawei,et al."Surface-reduced Si-doped TiO2 nanotubes for high-efficiency photoelectrochemical water splitting".FUNCTIONAL MATERIALS LETTERS 12.6(2019).