The effect of fluorine doping on the photocatalytic properties of hematite for water splitting

被引：11
|
作者：
Zhu, Yongxiang [1 ]
Xu, Jie [1 ]
Jiang, Hui [1 ]
Niu, Dongfang [1 ]
Zhang, Xinsheng [1 ]
Hu, Shuozhen [1 ]
机构：
[1] East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China
来源：
CRYSTENGCOMM | 2018年 / 20卷 / 41期
关键词：
ELECTRONIC-STRUCTURE; PHOTOELECTROCHEMICAL PROPERTIES; DOPANT CONCENTRATION; FE2O3; NANORODS; THIN-FILMS; PHOTOANODE; PERFORMANCE; MORPHOLOGY; EFFICIENCY;
D O I：
10.1039/c8ce01368c
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Fluorine-doped hematite samples with different concentrations were successfully synthesized through a hydrothermal method. The 3% F-doped hematite is found to be the optimal catalyst in this study which has a [110]-oriented structure and a remarkable photocurrent density of 1.24 mA cm(-2) at 1.23 V vs. RHE under one sun irradiation, which is about ten times higher than that of bare hematite (0.12 mA cm(-2)). F doping also reduces the recombination of free electron-hole pairs. The shift of the Fermi level position caused by F doping leads to the decrease of charge-transfer resistance in the bulk (R-1) and interface (R-2) and the increase of charge carrier concentration (N-d). In addition, F doping contributes to the shadow defect. All the results indicate that 3% F is the best doping concentration.
引用
收藏
页码：6430 / 6437
页数：8
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