| EFFECTS OF FINELY DISPERSED METALLIC PALLADIUM ON MICROSTRUCTURE AND PROPERTIES OF NANOCOMPOSITES PRODUCED BY SOL-GEL TECHNIQUE |
| |
| 作者姓名： | YuchengWu YongZhang LideZhang |
| |
| 作者单位： | [1]FacultyofMaterialsScienceandEngineering,HefeiUniversityofTechnology,Hefei230009,P.R.China [2]InstituteofSolidStatePhysics,ChineseAcademyofSciences,Hefei230031,P.R.China |
| |
| 摘 要： | 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.
|
| 关 键 词： | 纳米尺寸 钯粒子 纳米合成 光学性质 溶胶-凝胶技术 纳米技术 |
EFFECTS OF FINELY DISPERSED METALLIC PALLADIUM ON MICROSTRUCTURE AND PROPERTIES OF NANOCOMPOSITES PRODUCED BY SOL-GEL TECHNIQUE |
| |
| YuchengWu YongZhang LideZhang.EFFECTS OF FINELY DISPERSED METALLIC PALLADIUM ON MICROSTRUCTURE AND PROPERTIES OF NANOCOMPOSITES PRODUCED BY SOL-GEL TECHNIQUE[J].China Particuology,2004,2(1):19-24. |
| |
| Authors: | Yucheng Wu Yong Zhang and Lide Zhang Faculty of Materials Science and Engineering Hefei University of Technology Hefei P R China Institute of Solid State Physics Chinese Academy of Sciences Hefei P R China Author to whom correspondence should be addressed Tel: -- E-mail: ycwu@isspaccn |
| |
| Institution: | Yucheng Wu1,2,*,Yong Zhang2 and Lide Zhang2 1Faculty of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,P. R. China 2Institute of Solid State Physics,Chinese Academy of Sciences,Hefei 230031,P. R. China *Author to whom correspondence should be addressed. Tel: 0086-551-2901361,E-mail: ycwu@issp.ac.cn |
| |
| 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. |
| |
| Keywords: | nanosized palladium particle sol-gel nanocomposite optical properties |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
