Significantly enhanced photocatalytic performance of ZnO via graphene hybridization and the mechanism study
Significantly enhanced photocatalytic performance of ZnO via graphene hybridization and the mechanism study
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DOI：
10.1016/j.apcatb.2010.10.007
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发表时间：
2011-01-14
影响因子：
22.1
通讯作者：
Zhu, Yongfa
中科院分区：
文献类型：
--
作者：
Xu, Tongguang;Zhang, Liwu;Zhu, Yongfa
石墨烯与ZnO杂化可以制备高效的光催化剂。首先在ZnO纳米粒子表面包覆适量的氧化石墨烯，然后将氧化石墨烯原位还原形成ZnO/石墨烯复合材料。石墨烯杂化的ZnO光催化剂对有机染料的光催化降解表现出较强的光催化活性。光催化活性增强的程度强烈依赖于石墨烯在ZnO纳米颗粒表面的覆盖度。2wt%石墨烯杂化ZnO的光催化活性最高，约为纯ZnO的4倍。光催化活性的提高归因于ZnO与石墨烯之间的电子相互作用抑制了载流子的复合，提高了光生电子的迁移效率。电子相互作用进行了系统的研究和证实的光电化学测量。(C)2010爱思唯尔有限公司版权所有。
Graphene hybridized with ZnO could produce an efficient photocatalyst. The ZnO nanoparticles were firstly coated with an appropriate amount of graphene oxide, the graphene oxide was then in situ reduced to form the ZnO/graphene composite. Graphene hybridized ZnO photocatalyst showed enhanced photocatalytic activity for the degradation of organic dye. The degree of photocatalytic activity enhancement strongly depended on the coverage of graphene on the surface of ZnO nanoparticles. The sample of 2 wt% graphene hybridized ZnO showed the highest photocatalytic activity, which was about 4 times as that of pristine ZnO. The enhancement of photocatalytic activity was attributed to the high migration efficiency of photo-induced electrons and the inhibited charge carriers recombination due to the electronic interaction between ZnO and graphene. The electronic interaction was systematically studied and confirmed by the photoelectrochemical measurements. (C) 2010 Elsevier B.V. All rights reserved.