Silver nanoparticles in mesoporous aerogel exhibiting selective catalytic oxidation of benzene in CO2 Free air

被引:18
作者
Ameen, K. Balkis [1 ]
Rajasekar, K.
Rajasekharan, T.
机构
[1] Vellor Inst Technol, VIT, Vellore 632014, Tamil Nadu, India
[2] Def Met Res Lab, Hyderabad 500 058, Andhra Pradesh, India
[3] Anna Univ, Madras 600025, Tamil Nadu, India
关键词
silver nanoparticles; silica aerogel; sub-critical drying technique; selective oxidation of benzene;
D O I
10.1007/s10562-007-9233-3
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
The present article reports the synthesis of silver nanoparticles in silica aerogel matrix by sub-critical drying technique. The catalytic performance of these nanocomposites was evaluated for the selective oxidation of benzene. Silica aerogel with 1, 5, 10 and 25 wt.% of silver was prepared and characterized for their physico-chemical characteristics. The catalytic performance of these samples was evaluated as a function of silver particle size crystallized within the aerogel matrix. The sample with the silver concentration of 1 wt.% showed high selectivity among the tested samples. With increasing silver particle size, the % conversion increased with a decreased selectivity, which is attributed to the particle size effect on the catalytic oxidation of benzene.
引用
收藏
页码:289 / 295
页数:7
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