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以天然鳞片石墨为原料,以改进的Hummers法制备氧化石墨,氧化石墨经超声剥离后,加入氧化锌,制得了氧化锌/氧化石墨烯复合材料。采用X-射线衍射、扫描电镜、UV-Vis、红外光谱、紫外固体漫反射、荧光光谱等检测手段对该复合材料进行系统表征。复合材料的光催化性能测试:将10 mg催化剂加入至100 m L(10 mg/L)的亚甲基蓝溶液,在不同的光源下进行,其中在太阳光下60 min脱色率为98.98%,并对催化剂的重复使用性能进行测试。实验结果表明,复合光催化剂的光催化性能的提高与氧化石墨烯的含量密切相关。另外,对可见光的有效吸收、高效的电子分离和传输速率和对染料的吸附作用提高了复合材料的光催化性能。
Using natural flake graphite as raw material, graphite oxide was prepared by an improved Hummers method. After the graphite oxide was peeled off by ultrasonic, zinc oxide was added to obtain the zinc oxide / graphene oxide composite. The composites were systematically characterized by X-ray diffraction, scanning electron microscopy, UV-Vis, infrared spectroscopy, UV solid-state diffuse reflectance and fluorescence spectroscopy. The photocatalytic properties of the composites were tested by adding 10 mg of catalyst to 100 m L (10 mg / L) methylene blue solution under different light sources. The decolorization rate was 98.98% at 60 min in sunlight and the photocatalytic activity of the catalyst The repeated use of performance testing. The experimental results show that the photocatalytic performance of the composite photocatalyst is closely related to the content of graphene oxide. In addition, the effective absorption of visible light, efficient electron separation and transfer rate and the adsorption of dyes improve the photocatalytic performance of the composite.