Effects of finely dispersed metallic palladium on microstructure and properties of nanocomposites produced by sol-gel technique--颗粒学报PARTICUOLOGY

Wu, Y., Zhang, Y., & Zhang, L. (2004). Effects of finely dispersed metallic palladium on microstructure and properties of nanocomposites produced by sol-gel technique. China Particuology, 2(1), 19-24. https://doi.org/10.1016/S1672-2515(07)60015-3

Effects of finely dispersed metallic palladium on microstructure and properties of nanocomposites produced by sol-gel technique

Yucheng Wu ^{a b *}, Yong Zhang ^b, Lide Zhang ^b

a Faculty of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, P. R. China
b Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, P. R. China

10.1016/S1672-2515(07)60015-3

Volume 2, Issue 1, February 2004, Pages 19-24

Received 27 September 2003, Accepted 12 November 2003, Available online 27 November 2007.

E-mail: ycwu@issp.ac.cn

Highlights

Abstract

Nanosized palladium particles were incorporated into mesoporous silica matrix to obtain nanocomposites using the sol-gel technique. Effects of the finely dispersed metallic palladium on the microstructure and properties of the nanocomposites were investigated. By means of X-ray diffraction and optical absorption, it was found that palladium particles were 5∼9 nm in diameter and their uniform dispersion in the mesoporous silica depended on both the content of the palladium and the structural features of the silica matrix. The results showed that the mixing method of preparation led to wider size distribution of the nanosized particles as compared to the immersion method, but dispersed degree was reduced. Although the incorporation of nanosized palladium particles could not substantially induce significant structural changes of the matrix, the apparent red-shifted optical absorptions for the nanocomposites were observed as compared to the parent monolithic silica, particularly with increase in palladium loading and calcination temperature.

Graphical abstract

Keywords

nanosized palladium particle; sol-gel; nanocomposite; optical properties

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