微波合成介孔有机-无机互穿网络材料中金催化中心的构建  

Microwave-Assisted Synthesis of Mesoporous Organic-Inorganic Interpenetrating Networks for Fabricating Au Catalytic Sites

作　　者：彭建兵[1] 李晔[2] 曹志峰[2] 喻宁亚[2] 

机构地区：[1]顺德职业技术学院,中国顺德528300 [2]湖南师范大学湖南省资源精细化与先进材料重点实验室,中国长沙410081

出　　处：《湖南师范大学自然科学学报》2014年第6期29-34,41,共7页Journal of Natural Science of Hunan Normal University

基　　金：2013年顺德区科技计划资助项目(20130202056);国家自然科学基金资助项目(20803021);湖南师范大学青年优秀人才培养计划资助项目(ET21104)

摘　　要：采用微波加热一步合成了介孔有机-无机互穿网络材料.以材料孔道表面硅羟基为还原剂,氮原子和硫原子作为稳定剂成功制备了负载型纳米金催化剂.采用N2吸附-脱附、ICP、TEM及FT-IR等表征方法对所得催化剂进行了表征.以苯乙烯环氧化反应作为探针反应,考察了反应时间、反应温度、氧化剂用量、Au负载量、催化剂用量等反应条件对苯乙烯环氧化反应的影响.在最佳的反应条件下,苯乙烯的转化率和环氧化物的选择性分别达到98%和95%,且催化剂在使用5次后,催化活性基本不变.Mesoporous organic-inorganic interpenetrating networks were synthesized via a microwave-assisted one-step process. With the resultant materials as support,supported gold nanoparticle（ GNP） catalysts were successfully fabricated by using silanols on the pore surface of the networks as reducing agent and nitrogen / sulfur species as stabilizer. The supported GNP catalysts were characterized by N2adsorption-desorption,ICP,TEM,and FT-IR techniques. With epoxidation of styrene as test reaction,the effects of reaction parameters,such as reaction time and temperature,oxidant amount,Au content and catalyst amount,on catalysis performance of the GNP catalysts were investigated. Under optimum conditions,98% of styrene conversion with 95% of selectivity to styrene epoxide was obtained. Moreover,the catalyst could be reused for five times without significant loss of catalytic activity.

关 键 词：微波 纳米金 苯乙烯 环氧化 

分 类 号：O647.3[理学—物理化学]