After silane coupling agent 4-( chloromethyl) phenyltrichlorosilicane was grafted onto silica particles, the silica particles were endowed with hydrophobic benzyl choloride groups. Amphiphilic colloidal particles 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 samples structures. The oxidation reaction of benzyl alcohol was used to evaluate the catalytic performance of amphiphilic colloidal particles loaded with Pt particles. The result indicates that the yield of benzoic acid is up to 90%.%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％.
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