Silica aerogel-metal composites produced by supercritical adsorption

被引：42
作者：
Caputo, G. [1 ]
De Marco, I. [1 ]
Reverchon, E. [1 ]
机构：
[1] Univ Salerno, Dipartimento Ingn Chim & Alimentare, I-84084 Fisciano, SA, Italy
来源：
JOURNAL OF SUPERCRITICAL FLUIDS | 2010年 / 54卷 / 02期
关键词：
Aerogels; Gas adsorption; Metal-matrix composites; Silica; Composites; PLATINUM NANOPARTICLES; DEPOSITION; ROUTE;
D O I：
10.1016/j.supflu.2010.05.003
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：
Silica aerogel has been loaded with ruthenium acetyl acetonate (Ru(acac)(3)) by adsorption from supercritical carbon dioxide. Adsorption isotherms and kinetics were measured at different pressures and temperatures. The properties of impregnated aerogel were obtained by optical and electron microscopy (SEM), X-ray microanalysis (EDX) and thermogravimetric analysis (TGA). Results showed that Ru(acac)(3) can be uniformly dispersed into the aerogel up to 5 wt%. Moreover, precursor loading is controllable by properly changing operating conditions. The adsorbed metallorganic compound has been reduced to elemental ruthenium by heat treatment without inducing degradation and morphological changes of silica aerogel. (C) 2010 Elsevier B.V. All rights reserved.
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页码：243 / 249
页数：7
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