Photocatalytic Activity of Ag-TiO2 composites deposited by photoreduction under UV irradiation

KAREN NAVARRO

INTERNATIONAL JOURNAL OF PHOTOENERGY

HINDAWI PUBLISHING CORPORATION

Lugar: New York; Año: 2018 vol. 2018 p. 1 - 1

1110-662X

n this work, we synthesized Ag nanoparticles on TiO2 thin films deposited on soda lime glass substrates. Ag nanoparticles were synthesized by photoreduction under UV irradiation silver nitrate solution. X-ray diffraction, Raman spectroscopy, Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) measurements were used for physicochemical characterization. The structural study showed all samples were polycrystalline, main phases were anatase and rutile and not additional signals were detected after surface modification. Raman spectroscopy suggested silver aggregates deposited on the TiO2 films could exhibit the surface plasmon resonance phenomenon (SPR); XPS and SEM analysis confirmed TiO2 films morphological modification after photoreduction process. Photocatalytic degradation of Methylene Blue (MB) was studied under UV irradiation in aqueous solution and besides, pseudo-first order model was used to obtain kinetic information about photocatalytic degradation. R