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<p>In this study, Bi<sub>2</sub>O<sub>3</sub>/ Co<sub>3</sub>O<sub>4</sub> nanocomposite based photocatalyst has been synthesized by chemical co-precipitation method and its photocatalytic performance towards methylene blue (MB) organic dye in water under solar light irradiation has been investigated. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–visible spectroscopy and Fourier transform infrared spectroscopy (FTIR). The presence of mixed phases both related to Bi<sub>2</sub>O<sub>3</sub> and Co<sub>3</sub>O<sub>4</sub> has been depicted in XRD results with average crystallite size of 18&#xa0;nm. FTIR results further confirmed the successful formation of heterostructure supporting the XRD results. UV–visible spectroscopy revealed enhanced visible light absorption, consequently a significant reduction in the band gap to 1.45&#xa0;eV. The prepared composite nanostructures have shown effective photo-generated electron–hole pair separation and strong redox reaction sites leading to 88% photodegradation of MB dye.</p>

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Synergistic effect in Bi2O3/Co3O4 nanocomposite for enhanced degradation of methylene blue under natural sunlight irradiation

  • 期刊论文

  • 发表日期：

    2025年6月25日

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  • Ejaz Muhammad,
  • Tariq Jan,
  • Arslan Bashi

摘要

In this study, Bi2O3/ Co3O4 nanocomposite based photocatalyst has been synthesized by chemical co-precipitation method and its photocatalytic performance towards methylene blue (MB) organic dye in water under solar light irradiation has been investigated. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–visible spectroscopy and Fourier transform infrared spectroscopy (FTIR). The presence of mixed phases both related to Bi2O3 and Co3O4 has been depicted in XRD results with average crystallite size of 18 nm. FTIR results further confirmed the successful formation of heterostructure supporting the XRD results. UV–visible spectroscopy revealed enhanced visible light absorption, consequently a significant reduction in the band gap to 1.45 eV. The prepared composite nanostructures have shown effective photo-generated electron–hole pair separation and strong redox reaction sites leading to 88% photodegradation of MB dye.