Anatase TiO2 nanocrystals with exposed {001} facets on graphene sheets via molecular grafting for enhanced photocatalytic activity

被引:211
作者
Sun, Lei [2 ]
Zhao, Zhenlu [3 ]
Zhou, Yunchun [1 ]
Liu, Li [2 ]
机构
[1] Chinese Acad Sci, Changchun Inst Appl Chem, Natl Analyt Res Ctr Electrochem & Spectroscopy, Changchun 130022, Peoples R China
[2] Changchun Univ Technol, Sch Chem Engn, Changchun, Peoples R China
[3] Changchun Univ Sci & Technol, Sch Chem & Environm Engn, Changchun, Peoples R China
基金
中国国家自然科学基金;
关键词
TIO2-GRAPHENE NANOCOMPOSITES; H-2-PRODUCTION ACTIVITY; HYDROGEN-PRODUCTION; TITANIUM-DIOXIDE; HIGH PERCENTAGE; OXIDE SHEETS; NANOSHEETS; DEGRADATION; FABRICATION; COMPOSITE;
D O I
10.1039/c1nr11411e
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Owing to their extensive practical applications and fundamental importance, the controllable synthesis of well-faceted anatase TiO2 crystal with high percentage of reactive facets has attracted increasing attention. Here, nano-sized anatase TiO2 sheets mainly dominated by {001} facets had been prepared on graphene sheets by using a facile solvothermal synthetic route. The percentage of {001} facets in TiO2 nanosheets was calculated to be ca. 64%. The morphologies, structural properties, growth procedures and photocatalytic activities of the resultant TiO2/graphene nanocomposites were investigated. In comparison with commercial P25 and pure TiO2 nanosheets, the composite exhibited significant improvement in photocatalytic degradation of the azo dye Rhodamine B under visible light irradiation. The enhancement of photocatalytic activity and stability was attributed to the effective charge anti-recombination of graphene and the high catalytic activity of {001} facets.
引用
收藏
页码:613 / 620
页数:8
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