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Kumari S. Senthil,Nirmala W.,Chidhambaram N.,Prabu M.,Ganesh V.,Yahia I. S. 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.4
This report outlines the photo sensing and photocatalytic properties of the Sb-doped ZnO nanopowders synthesized using the co-precipitation method. According to X-ray diffraction analyses, the produced nanopowders are polycrystalline and devoid of any secondary phase clusters. After antimony was added to the ZnO host matrix, a reduction in crystallite size was noticed. The distinct stretching vibrational modes (Zn–O and Sb–O) present in the produced nanopowders are validated using FTIR measurements. The bandgap shrinkage from 3.21 to 3.16 eV was obtained with the substitution of 5 wt% antimony in the ZnO matrix. In the case of Sb doped nanopowder samples, the reduction in ultraviolet band emission intensity was observed signifying the delayed photo-generated charge carriers recombination, which could favor the photo sensing and photocatalytic activity in ZnO. The photo sensing of the fabricated devices showed maximum responsivity (R), detectivity (D*), and external quantum efficiency (EQE) of 4.78 × 10–2 AW−1, 4.27 × 109 Jones and 11.1%, respectively for the 5% Sb-doped ZnO nanopowder. In addition, the 5% Sb-doped ZnO nanopowder photocatalysts reveal a superior degradation efficiency of 77% among other prepared photocatalysts.