金-硅胶催化剂的一步合成及其催化苯乙烯环氧化性能的研究  

One-pot Synthesis of Au-silica Catalysts and Their Catalytic Performance over Styrene Epoxidation

作　　者：王芳[1] 刘俊华[2] 李伟敏[3] 

机构地区：[1]南京工业大学理学院,江苏南京210027 [2]南京师范大学化学与材料科学学院,江苏南京210097 [3]江苏省安全生产科学研究院,江苏南京210042

出　　处：《分子催化》2013年第4期333-341,共9页Journal of Molecular Catalysis(China)

基　　金：江苏省高校自然科学研究面上项目(12KJB150013);江苏省优势学科培育项目

摘　　要：环氧苯乙烷具有重要的经济价值,现有的工业生产技术存在能耗高及环境污染大等诸多问题,使得环境友好的苯乙烯环氧化生产工艺的开发具有重要意义.采用一步合成法制备了系列金-硅胶纳米球催化剂,实现了纳米金的高度分散(粒径6.4 nm),对苯乙烯环氧化反应表现出较好的催化活性及产物选择性.通过X射线粉末衍射、红外光谱及X射线光电子能谱等表征技术,结合苯乙烯环氧化反应性能的考察,对金-硅胶催化剂的制备条件进行了优化.Epoxides being very useful and versatile intermediates for the synthesis of many commodities and fine chemicals, and many problems, such as high energy consumption and environmental pollution, existed in industrial production, which makes studies on styrene epoxidation by environmentally friendly methods is a subject of great in- terest from both academic and industrial points of view. A series of Au-silica （nanosphere） catalysts were prepared by in situ synthesis; highly dispersed gold nanoparticles （ GNPs, 6.4 nm） were obtained, and catalytic tests showed good catalytic activity and epoxidation selectivity. The catalysts were characterized using X-ray diffraction （XRD）, Fourier transform infrared spectroscopy （FT-IR）, X-ray photoelectron spectroscopy （XPS） and other in- struments, combining with the investigation on the reactivities of styrene epoxidation, the preparation conditions of Au-silica catalysts were optimized.

关 键 词：纳米金 硅胶纳米球 苯乙烯环氧化 

分 类 号：O643.36[理学—物理化学] TQ612.9[理学—化学]