基于嵌段共聚物自组装和超临界流体技术制备介孔过渡金属氧化物材料

项目名称： 基于嵌段共聚物自组装和超临界流体技术制备介孔过渡金属氧化物材料

项目编号： No.51473068

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 李学

作者单位： 济南大学

项目金额： 78万元

中文摘要： 介孔过渡金属氧化物（如二氧化钛）是能源转化和光催化领域的关键材料之一，但如何建立可控的制备方法，制备结晶度高、同时具有高比表面积和孔体积的介孔材料仍是一个挑战。本项目利用嵌段共聚物/无机组分共组装形成的具有三维双连续结构的杂化材料为基础，借助超临界流体高压装置，研究在超临界流体环境中杂化材料的结构变化、无机金属氧化物的结晶情况、以及杂化材料的沉积过程，揭示超临界流体对嵌段共聚物/金属氧化物杂化材料结构的影响规律，掌握其形态、结构的调控方法，实现对杂化材料结构的精确控制，最终获得具有独特性能的介孔过渡金属氧化物材料，并探讨该类介孔材料的结构与光电性能和光催化性能之间的关系。期望通过本研究，发展新的调控介孔金属氧化物材料形态、结构的方法，为新型介孔材料的设计和制备提供科学依据与方法。因此本研究不仅具有重要的科学意义，而且具有重要的应用价值。

中文关键词： 嵌段共聚物；自组装；介孔材料；超临界流体；金属氧化物

英文摘要： Mesoporous transition metal oxide (such as titanium dioxide)is one of the key materials in the fields of energy conversion and photocatalysis. Controllable preparation of mesoporous transition metal oxides with higher crystallinity, specific surface area and pore volume is still a challenge.In this project, hybrid materials with double continuous network structures formed by co-assembly of block copolymers and inorganic components will be prepared first. By using a high pressure cell, the evolution of the co-assemblied structures,the transformation from amorphous to crystalline state of metal oxides, and the precipitation process of hybrid materials in supercritical conditions will be investigated in details. The influencing rule of supercritical fluids on the structures of hybrid materials will be obtained.The control methods of morphology of hybrid materials may be found. So accurate control of the structures of hybrid materials can be realized and finally mesoporous transition metal oxide materials with novel properties will be obtained. The correlation between the structures of the prepared mesoporous materials and optoelectronic properties or performance of photocatalytic degradation will be studied. After this study, novel routes to control the morphology of mesoporous metal oxide will be developed. Furthermore, this study will provide scientific basis and means for the design and fabrication of novel mesoporous materials. Therefore, this study is of great importance both in scientific and practice.

英文关键词： block copolymer;self-assembly;mesoporous material;supercritical fluids;metal oxide