Preparation and photocatalytic properties of magnetic responsive TiO2/graphene nanocomposites

被引：0
作者：
College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou [1 ]
730070, China
不详 [2 ]
730046, China
机构：
[1] College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou
[2] Natural Energy Institute of Gansu Academy of Sciences, Lanzhou
来源：
Cailiao Gongcheng | / 3卷 / 72-77期
关键词：
Composite; Graphene; Magnetic response; Photocatalytic performance; Titanium dioxide;
D O I：
10.11868/j.issn.1001-4381.2015.03.013
中图分类号：
学科分类号：
摘要：
A new type of magnetic responsive TiO2/graphene nanocomposites with response to external optical and magnetic fields was prepared by using emulsion intercalation hydrolysis method. Magnetic Fe3O4 nanoparticles were synthesized by hydrothermal method and dispersed in ethanol containing tetra-n-butyl titanate through ultrasonic processing to establish a tetra-n-butyl titanate micro-emulsion wrapping Fe3O4 nanoparticles. Then, the micro-emulsion was intercalated into graphene layers by vigorous stirring and a stable system was formed. Thereafter, the Fe3O4 and TiO2 nanoparticles were embedded into the layers of graphene through a controllable hydrolysis process. The morphology and structure of the samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). The photocatalytic properties of the synthesized nanocomposites were evaluated by degrading methylene blue in simulated solar light. The magnetic responsive TiO2/graphene nanocomposites exhibit excellent photocatalytic performance, and can be used repeatedly after the magnetic separation. The removal rate of methylene blue still maintains more than 90% even after repeated use for 7 times. ©, 2015, Cailiao Gongcheng/Journal of Materials Engineering. All right reserved.
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页码：72 / 77
页数：5
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