双亲性离子液体功能化复合胶体颗粒的合成与催化性能  

Synthesis and Catalytic Performance of Amphiphilic Composite Colloidal Particles with Ionic Liquid Groups

作　　者：胡大林[1] 张东阳[2] 张成亮[1] 丁书江[2] 杨振忠[1] 

机构地区：[1]中国科学院化学研究所,高分子物理与化学国家重点实验室,北京100190 [2]西安交通大学理学院应用化学系,西安710049

出　　处：《高等学校化学学报》2012年第10期2345-2350,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:50733004,20720102041,50930002);北京分子科学国家实验室开放课题和中央高校基本科研业务费专项资金(批准号:xjj2012092)资助

摘　　要：采用硅烷偶联剂4-氯苄基三氯硅烷对二氧化硅颗粒表面进行改性,制得表面接枝氯苄基的亲油二氧化硅颗粒.在亲油二氧化硅颗粒表面继续接枝亲水性的十二烷基咪唑,即可制得含有离子液体基团的双亲性二氧化硅颗粒.通过静电吸附氯铂酸和硼氢化钠还原,可在两亲性二氧化硅颗粒表面负载铂纳米颗粒,从而得到双亲性二氧化硅颗粒催化剂.用扫描电镜、透射电镜、X射线衍射和红外光谱等对所得样品进行表征,并以苯甲醇氧化反应为研究对象对催化剂性能进行评价,结果显示,使用此催化剂可使苯甲酸的产率达到90%.After silane coupling agent 4-（chloromethyl） phenyhrichlorosilicane was grafted onto silica parti- cles, the silica particles were endowed with hydrophobic benzyl choloride groups. Amphiphilic colloidal parti- cles with ionic liquid groups were obtained by reacting with dodecyl imidazole. Pt nanoparticles were loaded onto the surface of amphiphilic colloidal particles by adsorption of chloroplatinic acid and further reduction by sodium borohydride. Scanning electron microscope （ SEM ）, transmission electron microscope （ TEM ）, X-ray diffractometer（XRD） and Fourier transform infrared spectroscopy（FTIR） were used to characterize the sam- pies structures. The oxidation reaction of benzyl alcohol was used to evaluate the catalytic performance of am- phiphilic colloidal particles loaded with Pt particles. The result indicates that the yield of benzoic acid is up to 90%.

关 键 词：双亲性 离子液体 复合胶体颗粒 二氧化硅颗粒 

分 类 号：O631[理学—高分子化学] O648.11[理学—化学]