Uniform distribution of ZnO nanoparticles on the surface of grpahene and its enhanced photocatalytic performance
Uniform distribution of ZnO nanoparticles on the surface of grpahene and its enhanced photocatalytic performance
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DOI：
10.1016/j.apsusc.2018.01.299
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发表时间：
2018-05
影响因子：
6.7
通讯作者：
Bing Xue;Yingquan Zou
中科院分区：
文献类型：
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作者：
Bing Xue;Yingquan Zou
在此，氧化锌-石墨烯纳米复合光催化剂是通过一个简单的一步光化学方法获得。以氧化石墨烯（GO）为石墨烯的前体，氯化锌（ZnCl 2）为ZnO的单一来源，在光化学反应过程中实现了氧化石墨烯（GO）的还原和ZnO纳米颗粒（NPs）在石墨烯表面的均匀负载。采用X射线衍射、傅里叶变换红外光谱、拉曼光谱、X射线光电子能谱、扫描电子显微镜、透射电子显微镜和紫外-可见光谱对产物进行了表征。以亚甲基蓝（MB）染料的光催化降解为目标，研究了ZnO/rGO复合材料的光催化活性。所制备的ZnO/rGO光催化剂对染料（例如，MB）和高电荷分离性能。石墨烯平面在接收到来自ZnO的光电子后，可以有效地转移光电子，从而对污染物表现出高效的光催化降解。rGO的有效引入显著提高了ZnO的介电性能和传感性能，我们相信所制备的ZnO/rGO纳米复合材料在未来纳米技术的实际应用中将是有希望的。
Herein, a ZnO-graphene nanocomposite photocatalyst was obtained by a facile one-step photochemical method. Both the reduction of graphene oxide (GO) and uniform loading of ZnO nanoparticles (NPs) on the surface of graphene were achieved during the photochemical reaction process using GO as the precursor of graphene and zinc chloride (ZnCl2) as the single source of ZnO. The products were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and ultraviolet–visible spectroscopy. The photocatalytic activity of ZnO/rGO composites was studied by the photodegradation of methylene blue (MB) dye. The as-prepared ZnO/rGO photocatalyst possesses great adsorptivity of dyes (e.g., MB) and high charge separation properties. After receiving the photoelectrons from ZnO, graphene plane can effectively transfer the photoelectrons, thereby showing highly efficient photocatalytic degradation towards pollutants. The effective introduction of rGO significantly improved the photocatalysis and sensing properties of ZnO, and we believe that the as-prepared ZnO/rGO nanocomposite would be promising for practical applications in future nanotechnology.