Characterization and catalytic activity of gold nanoparticles synthesized by autoreduction of aqueous chloroaurate ions with fumed silica

被引:99
作者
Mukherjee, P
Patra, CR
Ghosh, A
Kumar, R [1 ]
Sastry, M
机构
[1] Natl Chem Lab, Catalysis Div, Pune 411008, Maharashtra, India
[2] Natl Chem Lab, Mat Chem Div, Pune 411008, Maharashtra, India
关键词
D O I
10.1021/cm010372m
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this report, a novel method for the synthesis of gold nanoparticles on an amorphous silica support is described wherein silanol groups on the surface of the fumed silica spontaneously reduce aqueous chloroaurate ions. This results in the formation of gold nanoparticles that are bound fairly strongly to the fumed silica surface. Alkylamine molecules present in solution were observed to reduce the size of the gold nanoparticles thus formed by self-assembling on the nanoparticles and preventing further growth. The gold nanoparticle size is dependent on the concentration of alkylamine molecules in solution. The gold nanoparticle-fumed silica composite material was found to be catalytically active in the hydrogenation of cyclohexene.
引用
收藏
页码:1678 / 1684
页数:7
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