共沉积法制备三维有序大孔材料及其对AP的催化

摘要三文有序大孔材料因其高度有序的反蛋白结构而受到广泛的关注，其应用前景可涉及光学、电子及化学等多个领域。本文主要阐述了PS球作为单分散聚合物微球，采用共沉积法制备三文有序大孔（3DOM）TiO2，并在3DOM TiO2骨架上包覆不同浓度的Co3O4，得到3DOM Co3O4 @ TiO2核壳结构复合金属氧化物。利用SEM、EDS、XRD等表征手段对3DOM TiO2及3DOM Co3O4 @ TiO2的形貌、物相进行表征。实验结果表明采用合适的聚合物微球乳液与前驱液比例所制得的锐钛矿型3DOM二氧化钛骨架呈周期性排列，长程有序，收缩率小，大孔的分散性和均匀程度都十分良好。通过改变Co（NO3)2 •6H2O的摩尔浓度，制备不同包覆壳厚度的3DOM Co3O4@ TiO2薄膜。SEM图像显示随前驱液浓度的增加，薄膜的厚度也随之增加，直至出现部分大孔被Co3O4完全填充的现象；EDS分析表明Co3O4的沉积量基本上与前驱液浓度的增大成正比。将不同壳厚度的3DOM Co3O4@ TiO2薄膜与AP混合进行测试，探究其对AP 的催化作用。DSC图谱表示3DOM Co3O4@ TiO2对AP的热分解具有比较明显的催化作用，并且随着包覆壳厚度的增加，催化效果也更加显著。26737
关键词三文有序大孔材料共沉积核壳结构高氯酸铵
毕业论文设计说明书外文摘要
Title Preparation of the 3DOM with Co-assembly and Its Catalytic Effect for AP
Abstract
The study of the three-dimensional ordered macroporous（3DOM）material has drawn considerable attention for its highly ordered inverse opal structures, which embrace tremendous potential values in optical, electronic and chemical applications. This paper is written to demonstrate a simple and efficient approach to prepare 3DOM TiO2 with polymerization and wrap it with the Co3O4 in different concentration to obtain the 3DOM Co3O4@TiO2 with core-shell construction. SEM, XRD, and EDS were used to give scientific analysis for the appearance and the objective images of the 3DOM TiO2 and the 3DOM Co3O4@TiO2. It shows that the reasonable percentage of the precursor can lead to a good result of the anatase TiO2, which shows a good uniformity and dispersibility of the holes. The thickness of the 3DOM Co3O4@TiO2 shell was determined by the amount of the Co（NO3)2 •6H2O in the precursor solution. The SEM images show that the thickness of the film grows with the increasing of concentration of the precursor and the hole may be filled with the Co3O4 when it comes to the certain concentration. The EDS analysis indicates that the deposited amount of the Co3O4 is basically proportional with the increasing concentration of the precursor solution. In order to study the catalytic effect of the 3DOM material, AP crystals were mixed with the 3DOM Co3O4@ TiO2 in different shell thickness. We could conclude from the DSC picture that it has an obvious influence to the thermal decomposition of the AP crystals. Moreover, the catalytic function becomes even more notable with the growth of the thickness of the Co3O4 shell.
Keywords 3DOM co-assembly core-shell construction AP
目   录
1 绪论   1
1.1 三文有序大孔材料   1
1.2 胶体晶体模板的制备   2
1.2.1 重力沉降自组装法   2
1.2.2 离心沉积自组装法   3
1.2.3 垂直沉积自组装法   3
1.2.4 物理限定法   4
1.3 三文有序大孔材料的制备   5
1.4 本课题研究内容   8
2 共沉积法制备3DOM TiO2的及其表征   10
2.1 实验试剂材料与测试仪器   10
2.2 3DOM TiO2的制备   10
2.3 3DOM TiO2的表征   11 共沉积法制备三维有序大孔材料及其对AP的催化:http://www.751com.cn/huaxue/lunwen_21003.html