Photocatalytic Oxidation of Sulfides by TiO2@GO-CdSe Nanocomposite Modified with CdS

In this study, aerobic photocatalytic oxidation of sulfides by TiO2@GO-CdSe and TiO2@GO-CdSeS nanocomposites under visible light irradiation were investigated. The nanocomposites were supported on the graphene oxide nano sheets via in situ syntheses of CdSe and TiO2 and then modified by CdSthrough a hydrothermal method. The nanocomposites were characterized by SEM imaging, XRD and EDAX analyses. The size of nanocomposites were distributed in a narrow range of 50-65 and 60-75 nm for TiO2@GO-CdSe and TiO2@GO-CdSeS, respectively. The yield of photocatalytic oxidation process was obtained 65% for TiO2@GO-CdSeS in optimized conditions. These nanocomposites show high activity under the mild condition and Visible light irradiation. The photocatalysts were recycled and reused 8 times without a significant decrease in activities.