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Optimal Ag concentration for H2 production via Ag:TiO 2 nanocomposite thin film photoanode
, Article International Journal of Hydrogen Energy ; Volume 37, Issue 4 , Feb , 2012 , Pages 3056-3065 ; 03603199 (ISSN) ; Kim, H ; Choi, W ; Moshfegh, A. Z ; Sharif University of Technology
Abstract
TiO2 thin films containing different concentrations of Ag nanoparticles have been synthesized by sol-gel method. According to UV-visible spectra, presence of an intense surface plasmon resonance peak at 490 nm of wavelength indicated formation of silver nanoparticles in the TiO2 films. Based on atomic force microscopy (AFM) analysis, the surface roughness and the effective surface ratio increased by increasing the Ag mol%. Moreover, scanning electron microscopy (SEM) images showed formation of Ag nanoparticles on the surface for the samples containing high Ag concentration. X-ray diffraction (XRD) patterns revealed that the size of Ag nanocrystals increased by increasing the Ag content in...