摘要近年来，蓝藻问题频繁爆发，造成了巨大危害。本文介绍了一类具有明确核/壳结构，以Fe3O4胶体纳米晶群为核心、以介孔TiO2为壳层的磁性介孔材料，即Fe3O4@mTiO2 ，来处理蓝藻问题。以FeCl3·6H2O为前驱体，乙二醇为溶剂，NaAc为碱源，采用溶剂热法制备Fe3O4磁性纳米粒子；利用溶胶凝胶法将致密TiO2层直接沉积在磁性胶体纳米晶群的表面上，然后将它们进行水热处理，从而形成介孔TiO2壳层。并用TEM、SEM、XRD、FTIR等对所制备的Fe3O4@mTiO2粒子进行了表征。结果表明，产品核壳结构明显，外层均匀包覆了大量介孔结构的无定型TiO2。实践蓝藻实验发现，所得Fe3O4@mTiO2对蓝藻的富集能力较强，且磁响应性好，对处理蓝藻有一定效果。63926
关键词 蓝藻 介孔 磁性 溶剂热法
毕业设计说明书（毕业论文）外文摘要
Title Synthesis and Adsorption Properties of Magnetic Mesoporous Materials
Abstract In recent years, blue-green algae problem outbreaks frequently, which has badly damaged the environment and our life. This article described a method to synthesize magnetic mesoporous Fe3O4@mTiO2 microspheres with a specific core/shell structure, a mesoporous TiO2 layer, which can be used to solve the problem. Fe3O4 nanoparticles can be prepared via solvothermal method, with FeCl3·6H2O, NaAc as reactant, EG as solvent; A compact TiO2 layer was deposited directly on the surface of Fe3O4 nanoparticles by a sol-gel method.; They were then subjected to a hydrothermal treatment, which led to the formation of a mesoporous TiO2 shell. The particles have been well characterized by TEM、SEM、XRD、FTIR method. The results showed that it has a specific core/shell structure, and it is coated by a mass of amorphous mesoporous structure TiO2 . After the blue-green algae test, we found that the Fe3O4@mTiO2 particles have a large enrichment capacity of blue-green algae and a high-magnetic-response. Therefore, Fe3O4@mTiO2 particles have a certain effect in dealing with the blue-green algae.
Keywords blue-green algae mesoporous magnetic solvothermal method
目 录
1 引言 1
2 Fe3O4磁性纳米微粒的合成 2
2.1 溶剂热法原理及合成机理分析 2
2.2 方案设计 3
2.2.1 实验试剂与仪器 3
2.2.2 Fe3O4制备方案 4
2.2.3 表征手段 5
2.3 实验结果分析 6
2.3.1 透射电镜分析 6
2.3.2 X射线衍射图谱分析 7
2.3.3 红外光谱分析 8
2.3.4 热重分析 9
2.4 本章小结 10
3 Fe3O4@TiO2和Fe3O4@mTiO2的制备 11
3.1 制备机理分析 11
3.2 方案设计 12
3.2.1 实验试剂与仪器 12
3.2.2 Fe3O4@TiO2和Fe3O4@mTiO2的制备方案 13
3.2.3 表征手段 15
3.3 实验结果分析 磁性介孔材料的合成及其吸附性能的研究:http://www.youerw.com/cailiao/lunwen_70790.html