尖晶石MAl2O4负载型S2O82-/MAl2O4固体酸的可控制备及结构与性能研究

项目名称： 尖晶石MAl2O4负载型S2O82-/MAl2O4固体酸的可控制备及结构与性能研究

项目编号： No.21203170

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理化学

项目作者： 王君霞

作者单位： 中国地质大学（武汉）

项目金额： 25万元

中文摘要： SO42-/MxOy固体酸是一种具有潜在应用价值的绿色催化材料。但其普遍存在失活快、稳定性差等不足，限制了其工业应用。而围绕该关键科学问题而开展的载体改性研究又存在载体晶型易变且难以控制的难题。本项目拟选择结构稳定，晶型单一的尖晶石MAl2O4为新型载体，开展S2O82-/MAl2O4固体酸的如下基础研究工作：拟借助尖晶石结构独特的同晶取代作用，在尖晶石MAl2O4晶格中直接引入过渡金属和稀土金属对其进行改性，优化其制备工艺条件，实现S2O82-/MAl2O4固体酸的可控制备；以现代高分辨电子显微学、分子光谱学等相结合的测试技术探讨尖晶石MAl2O4晶型结构对S2O82-/MAl2O4固体酸酸中心的形成，酸性质和稳定性影响作用本质规律，并建立其酸中心结构形成模型。拟为合成性能更优良的SO42-/MxOy固体酸寻找一种新型载体，并为深化SO42-/MxOy固体酸的理论研究提供一定的理论参考。

中文关键词： 尖晶石MAl2O4；固体酸；可控制备；结构；性能

英文摘要： SO42-/MxOy solid acids are green catalytic materials and show a promising potential in industry. However,they have similar disadvantages of rapid deactivation and poor stability, which limit their practical application.In order to solve these problems, many researchers have been devoted to studies on their modification. But, the crystal of the carriera is easy to change and difficulty of control during modification.In our subjet, we will focus on our work and research on S2O82-/MAl2O4 solid acids supported by a novel carrier spinel MAl2O4,which has advantages of structural stability and a single crystal.The main researches of the work are as follows: S2O82-/MAl2O4 solid acids will be modified by transition metals and rare earth metals.During modification, both transition metals and rare earth metals will be introduced directly into the crystal lattice of spinel MAl2O4 by the isomorphous substitution. The controllable preparation of S2O82-/MAl2O4 solid acids will be realized by optimizing preparation conditions.In addition,the essential influences of spinel MAl2O4 on the acid center formation, the acidic properties and the stability of S2O82-/MAl2O4 solid acids will be investigated by using high resolution electron microscopy, molecular spectroscopy and other characterization methods.Meanwhile,the structure mode

英文关键词： Spinel MAl2O4；Solid Acids；Controllable Preparation；Structure；Properties