Hierarchical Nanotubular Anatase/Rutile/TiO2(B) Heterophase Junction with Oxygen Vacancies for Enhanced Photocatalytic H2 Production

被引：89
作者：
An, Xiaoqiang [1 ]
Hu, Chengzhi [1 ,3 ]
Liu, Huijuan [2 ,3 ]
Qu, Jiuhui [1 ,3 ]
机构：
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
[2] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
LANGMUIR | 2018年 / 34卷 / 05期
基金：
中国国家自然科学基金;
关键词：
PHASE JUNCTION; HYDROGEN EVOLUTION; TIO2; NANOPARTICLES; BLACK TIO2; RUTILE; CORE; NANOCRYSTALS; CATALYST;
D O I：
10.1021/acs.langmuir.7b03745
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Oxygen vacancies have been demonstrated to enhance the interfacial charge separation in TiO2-based photocatalysts. In this report, we explored a facile route to synthesize hierarchical nanotubular anatase/rutile/TiO2(B) nanostructures with high surface area and defective electronic structure. The formation of oxygen vacancies in the heterophase junction was analyzed by UV-vis absorption spectra, electron spin resonance, and X-ray photoelectron spectroscopy. The enhanced interfacial charge separation and transportation ensured the excellent photoactivity of oxygen-deficient junctions for the photocatalytic production of hydrogen. As a result, the defective anatase/rutile/TiO2(B) junction showed a high hydrogen evolution rate of 2.79 mmol/h, which was 19 times higher than blank TiO2 nanotubes. The results demonstrate that defect modulation is a powerful tool to enhance the catalytic performances of TiO2-based photocatalysts.
引用
收藏
页码：1883 / 1889
页数：7
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