一步法制备Fe3O4/TiO2/石墨烯三元纳米复合材料及其光催化性能研究
毕业论文关键词：光催化；复合材料；二氧化钛；石墨烯；四氧化三铁
Title One-step preparation of Fe3O4/TiO2/RGO composite and its photocatalytic properties
Abstract Photocatalyst can use light to degrade the environmental pollutants, not only play the role of environmental governance, but also can save energy. Among them the traditional TiO2 photocatalysis material, because of its low price, non-toxic, the chemical stability, it deserve the researchers's favor. Pure TiO2 can only absorb ultraviolet light, and cannot use visible light, which make its application of catalytic degradation is restricted. Researchers study the modification methods, and have obtained some achievements, but there also need to further perfect, to make it not only the outstanding performance, but also more practical application value. Graphene is two-dimensional crystal material, it has many unique properties. With its high specific surface area and good conductive, TiO2 combines with graphene, it is expected to significantly improve the activity of photocatalyst. The TiO2 powder has relatively high photocatalysis activity, but the recycling is difficult, Fe3O4 magnetic particles were prepared by the Solvothermal method, and combined with TiO2 by hydro-thermal method. Using its property of magnetism, the recycle of photocatalyst is more efficient and convenient. combined with graphene modified TiO2,FTG has higher photocatalyticperformance.All sorts of composite materials were characterized by the X-ray diffraction,scanning electron microscope,transmission electron microscope, uv-vis diffuse reflectance spectroscopy,Raman spectra, etc.
Keywords: photocatalytic, composite materials, TiO2, graphene, Fe3O4。
1 绪论 . 1
1.1 光催化技术的发展历程 .. 1
1.2 纳米二氧化钛颗粒的基本研究 .... 2
1.3 磁载材料在光催化方面的应用 .... 5
1.4 石墨烯半导体光催化剂的研究 6
1.5 本课题的研究背景及主要研究内容 .. 7
2 一步法制备 Fe3O4/TiO2/ RGO 磁性光催化剂及催化性能初步探究 . 8
2.1 实验试剂及主要仪器. 8
2.2 实验分析表征手段 .. 10
2.3 实验步骤 ... 10
3 结果与讨论 .. 11
3.1 材料的表征 11
3.2 FTG 复合材料的光催化性能的初步研究 . 15
结论 ... 21
致谢 ... 22
参考文献 23