Preparation and Structural Characterization of Sol-Gel-Derived Silver Silica Nanocomposite Powders
International Journal of Materials Science and Applications
Volume 3, Issue 5, September 2014, Pages: 147-151
Received: May 30, 2014; Accepted: Aug. 23, 2014; Published: Sep. 10, 2014
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Duy Phong Pham, Laboratory of Advanced Materials, University of Science, Vietnam National University Ho Chi Minh City, Vietnam
Kim Khanh Huynh, Faculty of Materials Science, University of Science, Vietnam National University Ho Chi Minh City, Vietnam
Cao Vinh Tran, Laboratory of Advanced Materials, University of Science, Vietnam National University Ho Chi Minh City, Vietnam
Van Quang Vu, International Training Institute for Material Science (ITIMS), Hanoi University of Science and Technology (HUST), Hanoi, Vietnam
Thi Thanh Van Tran, Faculty of Materials Science, University of Science, Vietnam National University Ho Chi Minh City, Vietnam
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The silver embedded silica powders (Ag/SiO2) have been successfully prepared by sol-gel method. Ag nanoparticles were formed from the thermal decomposition of the silver nitrate. X-ray diffraction shows that the silver nanocrystals have appeared after a heat-treatment at 600 °C. TEM images show that the spherical silver particles with an average size around 30 nm dispersed homogeneously in silica matrix. The data of XRD, Raman and FTIR spectroscopy prove that the formation of the silver nanocrystals influent on the structural evolution of the silica matrix. The presence of metal nanocrystals leads to remarkable decrease in crystallizing temperature of SiO2. In addition, the adsorption-desorption analysis indicated that the growth of Ag particles makes the pores in silica structure widen.
Silver Nanoparticles, Silica Phase Transformation, Raman Spectroscopy, Ag/SiO2 Nano-Composite
To cite this article
Duy Phong Pham, Kim Khanh Huynh, Cao Vinh Tran, Van Quang Vu, Thi Thanh Van Tran, Preparation and Structural Characterization of Sol-Gel-Derived Silver Silica Nanocomposite Powders, International Journal of Materials Science and Applications. Vol. 3, No. 5, 2014, pp. 147-151. doi: 10.11648/j.ijmsa.20140305.13
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