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<p>In this study, one-pot sol-gel/auto-combustion method was applied to fabricate Bi<sub>2</sub>O<sub>3</sub>/MoO<sub>3</sub> nanocomposites as a direct <i>Z-Scheme</i> electrocatalyst. The manufactured composite’s structural, surface, and morphological characteristics were comprehensively investigated by XRD, FTIR, SEM/EDX, HR-TEM analyses, and UV–Visible spectroscopy. Results demonstrated that <i>Z-scheme</i> BMO-5 NCs’ low band gap energy is found at 3.027&#xa0;eV, with a high electrocatalytic activity. The electrocatalytic performance of BMO electrocatalyst was investigated <i>via</i> degradation of <i>Methyl blue</i> (MB), <i>Brilliant green</i> (BG), and mixed dyes under current voltage irradiation. Meanwhile, degradation efficiency of MB and BG dyes with BMO-5 NCs demonstrated around 96.16% within 15&#xa0;min and 96.73% within 5&#xa0;min, respectively. The EC kinetic rate data were analyzed using a <i>pseudo-first-order</i> kinetic model and the <i>Langmuir-Hinshelwood</i> (L-H) model. BMO-5 NCs have measured rate constants of 0.33803 and 0.62365&#xa0;min<sup>− 1</sup> for MB and BG dye. The hydroxyl radical<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:(\)</EquationSource> </InlineEquation><sup>•</sup><InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\:OH)\)</EquationSource> </InlineEquation> and superoxide radical <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\:(O\)</EquationSource> </InlineEquation><sub>2</sub><sup>•−</sup><InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\:)\)</EquationSource> </InlineEquation> significantly affect electrocatalytic degradation of BG dye. Bi<sub>2</sub>O<sub>3</sub>/MoO<sub>3</sub> is a potential material for environmental remediation and wastewater treatment, due to its dual functionality.</p> Graphical Abstract <p></p>

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Fabrication and Characterization of Z-Scheme Bi2O3/MoO3 Nanocomposite for Electrocatalytic Activity for Degradation of Mixed Organic Dyes

  • 期刊论文

  • 发表日期：

    2026年7月1日

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  • Ahmed M. Mokhtar,
  • Mohamed Abdel-Megid,
  • Ahmed T. Mosleh,
  • Mostafa E. Salem,
  • Heba Y. Zahran,
  • Elbadawy A. Kamoun,
  • V. Ganesh,
  • Ibrahim S. Yahia

摘要

In this study, one-pot sol-gel/auto-combustion method was applied to fabricate Bi2O3/MoO3 nanocomposites as a direct Z-Scheme electrocatalyst. The manufactured composite’s structural, surface, and morphological characteristics were comprehensively investigated by XRD, FTIR, SEM/EDX, HR-TEM analyses, and UV–Visible spectroscopy. Results demonstrated that Z-scheme BMO-5 NCs’ low band gap energy is found at 3.027 eV, with a high electrocatalytic activity. The electrocatalytic performance of BMO electrocatalyst was investigated via degradation of Methyl blue (MB), Brilliant green (BG), and mixed dyes under current voltage irradiation. Meanwhile, degradation efficiency of MB and BG dyes with BMO-5 NCs demonstrated around 96.16% within 15 min and 96.73% within 5 min, respectively. The EC kinetic rate data were analyzed using a pseudo-first-order kinetic model and the Langmuir-Hinshelwood (L-H) model. BMO-5 NCs have measured rate constants of 0.33803 and 0.62365 min− 1 for MB and BG dye. The hydroxyl radical \(\:(\) • \(\:OH)\) and superoxide radical \(\:(O\) 2•− \(\:)\) significantly affect electrocatalytic degradation of BG dye. Bi2O3/MoO3 is a potential material for environmental remediation and wastewater treatment, due to its dual functionality.

Graphical Abstract