Solvothermal preparation of Ti3+ self-doped TiO2-x nanotube arrays for enhanced photoelectrochemical performance

被引：12
作者：
Hou, Junwei [1 ]
Xu, Tengze [1 ]
Ning, Yanbin [1 ]
Huang, Bingxuan [1 ]
Yang, Ye [1 ]
Wang, Qingyao [2 ]
机构：
[1] China Univ Petr Beijing Karamay, State Key Lab Heavy Oil Proc, Karamay 834000, Peoples R China
[2] Ludong Univ, Sch Chem & Mat Sci, Yantai 264025, Peoples R China
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2021年 / 244卷
基金：
中国国家自然科学基金;
关键词：
Self-doping; TiO2 nanotube arrays; Solvothermal method; Photoelectrochemical property; BLACK TIO2; SENSITIZED TIO2; RUTILE TIO2; PHOTOCATALYTIC ACTIVITY; HYDROTHERMAL SYNTHESIS; NANOROD ARRAYS; CONVERSION; PHOTOANODE; NANOSHEETS; LAYER;
D O I：
10.1016/j.saa.2020.118896
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Ti3+ self-doped TiO2-x nanotube arrays (TiO2-x NTs) were prepared by solvothermal treatment in KBH4 ethanol solution followed by calcination, and were characterized by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-vis diffusion reflection spectroscopy (DRS). The photoelectrochemical properties of TiO2-x NTs prepared in different KBH4 concentrations were investigated. The TiO2-x NTs exhibited high visible light response, visible light photocurrent and photoelectrocatalytic activities. The active species and photocatalytic mechanism for the dye degradation were proposed, and the improved photoelectrochemical performance was attributed to the synergistic effect of the narrowed energy gap and enhanced electron transportation. The ability to improve the photoelectrochemical properties of TiO2-x electrode materials should open up new opportunities for high-performance solar cells and photocatalysts. (C) 2020 Elsevier B.V. All rights reserved.
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页数：7
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