Journal
APPLIED SURFACE SCIENCE
Volume 248, Issue 1-4, Pages 514-517Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2005.03.037
Keywords
selective solar absorber; porous silica; nanocomposites
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In this paper, we describe new film structures based on porous silica and nanosized carbon for selective solar absorbers application. The films show high absorbance in the solar-spectral region and low emittance in the IR region. The best results for 1000 nm thick films of nanocomposite silica-carbon has excellent optical parameters, absorbance alpha(s) = 0.94 and IR emissivity of epsilon = 0.15. The films show good stability under the influence of humidity and high temperatures (250-300 degrees C). This new solar absorber structure offers low cost production and both the materials are easily available and non-toxic. The overall process of film preparation is simple and works under green-chemistry conditions. (c) 2005 Elsevier B.V. All rights reserved.
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