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