Photocatalytic heterojunction of CeCoO۳/CdS for conversion of organicdyes

Recently, oxide perovskites with the general formula ABO۳ have attracted the attention ofmany scientists [۱]. Cerium cobalt oxide perovskite, represented by CeCoO۳, exhibits promisingcapabilities as a nanophotocatalyst in the conversion of organic dyes [۱]. Additionally, Cobalt(II)sulfide (CdS), a semiconductor, shows high performance in light absorption due to its suitableband gap energy [۲,۳]. The CeCoO۳/CdS photocatalysis was synthesized using the hydrothermalmethod. The prepared heterojunction structure was characterized using various techniques andapplied to the decolorization of methylene blue under visible light irradiation. FT-IR, FE-SEM,EDS, PL, and DRS analyses were employed to identify the properties of CeCoO۳/CdSphotocatalysis. The FE-SEM images demonstrated the successful deposition of CdS on the surfaceof CeCoO۳ perovskite. The effect of catalyst amount, temperature, pH, and electron acceptor wasinvestigated. In the presence of the CeCoO۳/CdS photocatalyst, the decolorization rate ofmethylene blue reached ۹۹% within ۱۵ minutes, whereas no significant conversion of methyleneblue was observed with the perovskite alone. The higher photoactivity of CeCoO۳/CdS isattributed to its lower charge recombination compared to pure perovskite. Additionally, thephotocatalytic mechanism and recycling tests of CeCoO۳/CdS are discussed in detail.

کلیدواژه ها:

Conversion of Dyes ، Perovskite ، Photocatalyst