Synthesis and Characterization of Pd/Ag/SiO2 Nano-Composite Materials
| Autor: | Zhi Tong, Bao Song Li, Rui Hua Mu, Yang Jing |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Diffraction
Materials science 010405 organic chemistry Mechanical Engineering Analytical chemistry 010402 general chemistry 01 natural sciences 0104 chemical sciences Characterization (materials science) Zeta Potential Analysis Mechanics of Materials Particle-size distribution Zeta potential Particle General Materials Science Fourier transform infrared spectroscopy Sol-gel Nuclear chemistry |
| Zdroj: | Key Engineering Materials. 726:204-209 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.726.204 |
| Popis: | Pd/Ag/SiO2 sols and powder materials were prepared by adding AgNO3 and Pd (NO3)2·2H2O into a methyl-modified silica sol. Tetraethylorthosilicate and methyltriethoxysilane were used as the silica precursor for the sol-gel reaction. The obtained SiO2 sols and powder materials were characterized by sol particle size distribution, zeta potential analysis, UV-Vis spectra, Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) measurement. It was found that most of the particle sizes of the prepared Pd/Ag/SiO2 sols are about 2~10 nm with narrow size distribution. The zeta potential of Pd/Ag/SiO2 sol with Pd/Ag molar ratio of 7.5/2.5 presents the highest value. The FTIR analysis substantiates that the Si-CH3 groups exist in the silica network and the formed Pd/Ag/SiO2 sol particles possess linear structure. XRD characterization indicates that the Pd2+ and Ag+ in the Pd/Ag/SiO2 materials had be reduced to Pd0 and Ag0, respectively, after annealed in a nitrogen atmosphere at 350°C. |
| Databáze: | OpenAIRE |
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