High-efficiency photoelectrochemical water splitting with heterojunction photoanode of In2O3-x nanorods/black Ti-Si-O nanotubes

被引：22

作者：

Dong, Zhenbiao ^{[1
]}

Ding, Dongyan ^{[1
]}

Li, Ting ^{[1
]}

Ning, Congqin ^{[2
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Inst Elect Mat & Technol, Shanghai 200240, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2019年 / 44卷 / 33期

基金：

中国国家自然科学基金;

关键词：

PEC water splitting; Heterojunction photoanode; TiO2; nanotubes; Si-doping; In2O3; nanorods; EARTH-DOPED TIO2; BLACK TIO2; PHOTOCATALYTIC ACTIVITY; ARRAYS; ANODIZATION; ABSORPTION; REDUCTION; ENERGY;

D O I：

10.1016/j.ijhydene.2019.05.165

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Constructing heterojunction was an efficient way to promote photoelectrochemical (PEC) water splitting performance of TiO2-based nano-photoanode. In this work, we demonstrated the feasible preparation of oxygen vacancies-induced In2O3 (In2O3-x) nanorods/black Si-doped TiO2 (Ti-Si-O) nanotubes heterojunction photoanode for enhanced PEC water splitting. Black Ti-Si-O nanotubes were fabricated through Zn reduction of the as annealed Ti-Si-O nanotubes, followed by In2O3-x, nanorods coupling by a facile electro-depositing and Ar heat treatment. Solar to hydrogen conversion efficiency of the heterojunction photoanode reached as high as 1.96%, which was almost 10 times that of undoped TiO2. The improved PEC properties were mainly attributed to co-doping effects of Si and Ti3+/oxygen vacancy as well as In2O3-x decoration, which resulted in enhanced optical absorption and facilitated separation-transport process of photogenerated charge carriers. Charge transfer process in the composite system and hydrogen production mechanism were proposed. This work will facilitate designing TiO2-based nano-photoanodes for promoting water splitting by integrating with elements doping, oxygen vacancies self-doping and semiconductors coupling. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：17611 / 17621

页数：11

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