Visible Light Assisted Photocatalytic Activity of Co-doped ZnO, In-Doped ZnO and (Co, In) co- doped ZnO Nanoparticles
Journal Title: International Journal of Nanotechnology and Application (IJNA) - Year 2018, Vol 8, Issue 2
Abstract
Zinc Oxide (ZnO), Cobalt (Co), Indium (In) individually doped and co-doped (Co-In) ZnO nanoparticles were synthesized by the co-precipitation method. UV-visible diffuse reflectance spectroscopy (UV-vis-DRS), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron spectroscopy (TEM), energy dispersive X-ray spectroscopy (EDX), Brunauer-Emmett-Teller (B. E. T) surface area analysis and photoluminescence spectra (PL) were used to characterize the nanoparticles. The as-prepared Co-In-ZnO nanoparticles have an extended light absorption range compared with pure ZnO. The incorporation of Co and In to ZnO produces a decrease in the optical band gap compared to the ZnO and showed highly efficient photocatalytic activity to degrade 94% of methylene blue (MB) dye under visible light irradiation. The enhancement of photocatalytic activity is due to the fact that the modification of ZnO with Co and In can increase the separation efficiency of photo generated electrons and holes in ZnO. The optimum values of different reaction parameters like theeffect of pH, initial dye concentration and catalyst dosage on the photodegradation of MB were obtained by varying pH (5-12), initial dye concentration (8-12μM) and catalyst dosage (0.25-1.0g/L). Furthermore, the antimicrobial activity and the reusability of Co-In-ZnO was tested. Furthermore, the antimicrobial activity and the reusability of Co-In-ZnO was tested
Authors and Affiliations
P. MALATHY, S. SELVARAJAN
Keywords
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- EP ID EP350071
- DOI 10.24247/ijnajun20181
- Views 75
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