期刊
JOURNAL OF SUPERCRITICAL FLUIDS
卷 54, 期 2, 页码 243-249出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.supflu.2010.05.003
关键词
Aerogels; Gas adsorption; Metal-matrix composites; Silica; Composites
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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