Abstract

Pure SnO2, Zn (0.075 M) doped SnO2 loaded corn cob activated carbon (Zn: SnO2/CCAC) were synthesized by a chemical precipitate process. The influence of Zn doped and CCAC loaded on the crystallite structure, optical, morphology, and photocatalytic properties of pure SnO2 were investigated. The XRD patterns confirmed that Zn doped SnO2 with loaded CCAC sample exhibited a rutile tetragonal structure. The XPS survey confirmed that the Zn ion was incorporated into the SnO2 lattice with a Zn2+ oxidization state. The band gap value of Zn: SnO2/CCAC was reduced (3.48 eV) as compared to pure SnO2 and doped samples. Further, the reduced PL emission intensity of Zn: SnO2/CCAC and its reduced resistance value of impedance from EIS analysis, and the enhanced separation of the photogenerated e−/h+ pairs support the enhanced photodegradation efficiency. The Zn: SnO2/CCAC sample showed improvement in the photodegradation efficiency (98.61 %) of methylene blue (MB) as compared to pure SnO2 and Zn: SnO2, respectively.

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