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International Journal of Photoenergy
Volume 7, Issue 4, Pages 193-198
http://dx.doi.org/10.1155/S1110662X05000292

Structure and spectra of photochemically obtained nanosized silver particles in presence of modified porous silica

1Institute of Surface Chemistry, Ukrainian National Academy of Sciences, 17 General Naumov str., Kyiv 03164, Ukraine
2Laser Dynamic Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta 30332, GA, USA

Copyright © 2005 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Mesoporous silica powders and films modified with organic sensitizer benzophenone were used as photocatalysts in the reaction of silver ion reduction by isopropyl alcohol under UV-irradiation with λ= 253.7 nm and 365 nm in presence of colloidal silica as stabilizer. Morphological changes of silver colloids during irradiation were studied using transmission electron microscopy, and correlated to the absorption spectra.