Highly efficient photocatalytic hydrogen evolution of graphene/YInO3 nanocomposites under visible light irradiation

被引:49
作者
Ding, Jianjun [1 ,2 ,3 ]
Yan, Wenhao [1 ,2 ,3 ]
Xie, Wei [1 ,2 ,3 ]
Sun, Song [1 ,2 ,3 ]
Bao, Jun [1 ,2 ,3 ]
Gao, Chen [1 ,2 ,3 ]
机构
[1] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China
[2] Univ Sci & Technol China, Collaborat Innovat Ctr Chem Energy Mat, Hefei 230029, Anhui, Peoples R China
[3] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China
关键词
STEP SOLVOTHERMAL SYNTHESIS; H-2; EVOLUTION; WATER; TIO2; COMPOSITES; OXIDE; DEGRADATION; NANOCRYSTALS; ENHANCEMENT; PERFORMANCE;
D O I
10.1039/c3nr05984g
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Visible-light-driven hydrogen evolution with high efficiency is important in the current photocatalysis research. Here we report for the first time the design and synthesis of a new graphene-semiconductor nanocomposite consisting of YInO3 nanoparticles and two-dimensional graphene sheets as efficient photocatalysts for hydrogen evolution under visible light irradiation. The graphene/YInO3 nanocomposites were synthesized using a facile solvothermal method in which the formation of graphene and the deposition of YInO3 nanoparticles on the graphene sheets can be achieved simultaneously. The addition of graphene as a cocatalyst can narrow the band gap of YInO3 to visible photon energy and prolong the separation and lifetime of electron-hole pairs by the chemical bonding between YInO3 and graphene. The photocatalytic reaction with this nanocomposite reaches a high H-2 evolution rate of 400.4 mu mol h(-1) g(-1) when the content of graphene is 0.5 wt%, over 127 and 3.7 times higher than that of pure YInO3 and Pt/YInO3, respectively. This work can provide an effective approach to the fabrication of graphene-based photocatalysts with high performance in the field of energy conversion.
引用
收藏
页码:2299 / 2306
页数:8
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