Surface-reduced Si-doped TiO2 nanotubes for high-efficiency photoelectrochemical water splitting
文献类型:期刊论文
作者 | Si, Dawei; Dong, Zhenbiao; Li, Ting; Ding, Dongyan; Ning, Congqin |
刊名 | FUNCTIONAL MATERIALS LETTERS |
出版日期 | 2019-12-30 |
卷号 | 12期号:6 |
ISSN号 | 1793-6047 |
关键词 | TiO2 nanotubes Si-doping NaBH4 reduction water splitting |
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 |
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). |
入库方式: OAI收割
来源:上海硅酸盐研究所
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