Preparation and Characterization of TiO2@SiO2-Ag Nanospheres Photocatalyst, and Investigation of Its Photocatalytic Activity on Methylene Blue

Authors : Taner Tekin, Derya Tekin, Hakan Kiziltas

Pages : 89-96

View : 12 | Download : 7

Publication Date : 2017-10-20

Article Type : Research Paper

Abstract :Normal 0 21 false false false TR X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:`Table Normal`; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:``; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:`Times New Roman`,serif;} Titanium dioxide shows a tremendous potential for the decomposition of organic pollutants under UV and visible light irradiation. In this study TiO 2 nanospheres @ mesoporous silica nanospheres insert ignore into journalissuearticles values(TiO 2 @SiO 2 ); photocatalyst was synthesized by the sol-gel method. The synthesized TiO 2 /SiO 2 photocatalyst was decorated by Ag nanoparticle. The decorated TiO 2 @SiO 2 –Ag photocatalyst by a hydrothermal method was characterized by scanning electron microscope insert ignore into journalissuearticles values(SEM);, energy-dispersive X-ray spectroscopy insert ignore into journalissuearticles values(EDS); and X-ray diffraction insert ignore into journalissuearticles values(XRD);. The SEM results show that TiO 2 @SiO 2 –Ag nanospheres photocatalyst was uniformly formed. The EDS analysis proves that the nanospheres photocatalyst consists of Ti, Si, O and Ag. The TiO 2 @SiO 2 –Ag nanospheres photocatalyst exhibited better photocatalytic performance for degradation of methylene blue under direct UV illumination.     
Keywords : Titanium dioxide, Core Shell, Silver nanoparticles, Silica spheres