高稳定性有序介孔尖晶石AFe2O4(A=Zn,Cu,Co,Ni)的可控制备及可见光催化分解水制氢研究

项目名称： 高稳定性有序介孔尖晶石AFe2O4(A=Zn,Cu,Co,Ni)的可控制备及可见光催化分解水制氢研究

项目编号： No.51272070

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 田国辉

作者单位： 黑龙江大学

项目金额： 80万元

中文摘要： 介孔材料与纳米粒子相比具有规整的孔道结构、高的孔隙率和大比表面积等优点，但也存在热稳定性和晶化度较差的问题。本项目拟探索设计与合成高稳定性和高晶化度的有序介孔AFe2O4(A=Zn,Cu,Co,Ni)的有效途径。采用蒸发诱导自组装技术，利用有机胺分子束缚介孔AFe2O4初级粒子，实现高温焙烧时对初级粒子聚集和生长的有效控制，在稳固介孔AFe2O4的有序介观网络结构的同时，提高介孔孔壁的晶化度，最终制备出高稳定性的有序介孔AFe2O4。在此基础上，利用压力诱导辅助纳米铸造法将助催化剂（如贵金属、半导体纳米粒子）沉积到介孔AFe2O4中，以提高可见光催化分解水制氢性能。利用X-射线同步辐射、瞬态与稳态光伏等技术研究高稳定性的介孔AFe2O4及其复合体材料的微结构和电荷传输机制，揭示催化剂组成、结构和性能之间的关系，阐明光催化分解水制氢机制，为设计新型高稳定性可见光催化剂提供思路。

中文关键词： 介孔；尖晶石；复合体；高稳定性；可见光催化

英文摘要： Compared to nanoparticles, mesopoeous materials possess regular pore structure, high porosity and large surface area. However, it also has low thermal stability and poor crystallinity. In order to resolve it, this project would explore the effective approach for design and synthesis of high stability ordered mesoporous AFe2O4(A=Zn, Cu, Co, Ni). In this project, high stability ordered mesoporous AFe2O4 films were prepared through the evaporation-induced selfassembly (EISA) route, combined with encircling organic amine protectors to restrict the AFe2O4 primary particles, and achieve the effective control of the aggregate and growth for the primary particles under high temperature calcination. While maintaining the liquid crystal mesophase structure of AFe2O4, the crystallinity of the mesoporous wall was also improved, so the high stability ordered mesoporous AFe2O4 was obtained. On the basis of this study, in order further to improve the separation of photoinduced electron-hole and the efficiency of photocatalytic water splitting, cocatalysts (noble metal and semiconductor oxide nanoparticles) were deposited into the mesoporous AFe2O4 by the nanocasting method with the pressure-induced assistance. So the AFe2O4 composites can be constructed. X-ray synchrotron radiation, transient state and steady state technology

英文关键词： mesoporous；spinel；composites；high stability；visible light photocatalysis