溶胶-凝胶制备技术与新型催化材料Ⅲ.溶胶粒子表面修饰方法制备催化膜  

NOVEL CATALYTIC MATERIALS FROM SOL GEL TECHNIQUE Ⅲ. Porous Catalytic Membranes Prepared by Modification of the Surface of Sol Particles

作　　者：赵宏宾[1] 李安武[1] 谷景华 盛世善 熊国兴[1] 

机构地区：[1]中国科学院大连化学物理研究所催化基础国家重点实验室

出　　处：《催化学报》1997年第5期368-372,共5页

基　　金：国家科委和国家自然科学基金

摘　　要：提出用溶胶粒子表面修饰方法，结合溶胶凝胶技术制备无机催化膜．该方法的基本原理是利用合适的金属配合物在胶粒表面的吸附作用，经溶胶凝胶过程，将活性组分结合到无机膜中．实验测定结果表明：（ＮｉＥＤＴＡ）２－，ＶＯ－３，ＭｏＯ２－４，（Ｐｄ（ＮＨ３）４）２＋，ＰｄＣｌ２－４，ＰｔＣｌ２－６和ＲｈＣｌ３－６可用来修饰ＡｌＯＯＨ溶胶．以Ｐｄ／γＡｌ２Ｏ３催化膜的制备为例，经三次溶胶凝胶过程，可制得无裂缺的厚度为９μｍ的Ｐｄ／γＡｌ２Ｏ３催化膜，膜材料的平均孔直径为６ｎｍ，Ｐｄ被均匀地分布在膜的顶层，其平均粒径为２３ｎｍ．Sol gel method has been employed to produce ceramic membranes. In the sol gel process. The modification of the surface of sol particles was proposed to incorporate active components with ceramic membranes, resulting in catalytic membranes. The experimental results showed that (NiEDTA) 2- , VO - 3, MoO 2- 4, (Pd(NH 3) 4) 2+ , PdCl 2- 4, PdCl 2- 6 and RhCl 3- 6 can be adsorbed onto the surface of AlOOH sol particles in the pH range of 3～4, yielding the active component modified AlOOH sol. As an example, Pd/ γ Al 2O 3 catalytic membrane was prepared. Pd/ γ Al 2O 3 catalytic membrane realized by three time sol gel process is defect free, and has a thickness of 9 μm and an average pore size of 6 nm. Palladium is highly and homogeneously dispersed in the top layer of Pd/ γ Al 2O 3 catalytic membranes.

关 键 词：溶胶 凝胶 吸附 钯 催化膜 膜反应器 膜催化 

分 类 号：TQ426.6[化学工程]