Modification of the Synthesized ZnO Nanoparticles by Doping with Cobalt and Carbon Nanotubes and Investigation Its Catalytic Activity Via Removing of Bsimarck Brown G Dye from Its Aqueous Solution

Abstract

The present work  represents preparation of zinc oxide nanoparticles (ZnONPs) using red tea leaf  extract by combination with zinc nitrate hexahydrate as an eco-friendly method. Then, prepared  ZnONPs  was doped with cobalt yield  modified ZnONPs,  (Co/ZnONPs). Then, these materials was combined with carbon nanotubes (CNTs) to yield ZnONP/CNTs, and  Co/ZnONPs/CNTs. The prepared materials were characterized using X- rays diffraction (XRD) technique,   Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), Atomic absorption spectroscopy (AAS),  BET specific surface area,  and Raman spectra .The activity of these materials was investigated by following removal of BBG dye from its simulated aqueous solution by adsorption.The best  efficiency  of BBG dye removal by adsorption  was around 82%after one hour of adsorption period and it was  obtained overCo/ZnO/MWCNTs.