文献类型： 外文期刊
作者： Chu, Jiayu 1 ; Sun, Yanchun 3 ; Han, Xijiang 1 ; Zhang, Bin 1 ; Du, Yunchen 1 ; Song, Bo 2 ; Xu, Ping 1 ;
作者机构： 1.Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers, Harbin 150001, Heilongjiang, Peoples R China
2.Harbin Inst Technol, Dept Phys, Acad Fundamental & Interdisciplinary Sci, Harbin 150001, Heilongjiang, Peoples R China
3.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Minist Agr, Lab Qual & Safety Risk Assessment Aquat Prod Harb, Harbin 150070, Heilongjiang, Peoples R China
关键词： photocatalysis; water splitting; titanium oxide; mixed phase strategy; hydrogen evolution
期刊名称：ACS APPLIED MATERIALS & INTERFACES （ 影响因子：9.229； 五年影响因子：9.57 ）
ISSN： 1944-8244
年卷期： 2019 年 11 卷 20 期
页码：
收录情况： SCI
摘要： Titanium dioxide is a promising photocatalyst material for water splitting, but is limited by its low utilization of solar energy and rapid recombination of electron-hole pairs. Herein, a mixed titanium oxide strategy, utilizing TiO2/Ti2O3 heterostructures consisting of in situ grown TiO2 nanotubes with mixed anatase and rutile phases on bulk Ti2O3 materials, is demonstrated for efficient and recyclable hydrogen evolution from photocatalytic water splitting. Taking advantage of the formed heterostructures and the created porous structures, the photogenerated electrons from the conduction band of anatase TiO2 can be first delivered to rutile TiO2 and then transferred to Ti2O3. Meanwhile, the presence of Ti(2)O3 in TiO2/Ti2O3 heterostructures can substantially promote the charge mobility and suppress the recombination of photogenerated electron-hole pairs. Hence, with a tuned band gap structure that enables rapid electron-hole separation, increased charge carrier density, and enhanced light absorption, the TiO2/Ti2O3 heterostructures provide an enhanced photocatalytic hydrogen evolution rate as high as 1440 mu mol g(-1) h(-1) under full-sunlight irradiation and without any other cocatalyst. This mixed titanium oxide strategy may open up new avenues for designing and constructing highly efficient TiO2-based photocatalytic materials for various applications.
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