Abstract
The synthesis of an efficient photocatalyst for removing organic contaminants in the water is of major importance for researchers working in heterogeneous photocatalysis. To do this, we provide the co-precipitation approach for synthesizing heterojunction nanocomposite (CdO-ZnO). Standard analytical techniques were used to characterize the synthesized components. According to the XRD and DRS results, a composite of ZnO and CdO was effectively synthesized with a shift of λmax towards the higher wavelength. SEM pictures reveal well-decorated oval-shaped CdO nanoparticles with hexagonal ZnO particle morphology. Under visible light irradiation, the as-prepared CdO-ZnO nanocomposite demonstrated very efficient photocatalytic performance as measured by the decomposition of RhB, MB, paracetamol, and ciprofloxacin in an aqueous solution. The photo-mineralization of MB and RhB over the most active CZ-3 catalyst was also assessed by measuring the decrease in TOC (total organic carbon) content over time when exposed to visible light. The breakdown of paracetamol produces no hazardous by-products, according to high-performance liquid chromatography (HPLC) study. The photocatalytic process appears to be dominated by OH and h+, according to the radical scavenger tests.
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