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<p>In the present study, copper-doped hybrid Au@ZnO nanorods (Cu/Au@ZnO) were prepared via polyol mediated method using triethylene glycol (TEG). The TEG molecules act as both solvent and surfactant. The microstructural and optical properties of the resulting nanocomposites were studied. The photocatalytic activity of the prepared hybrid Cu/Au@ZnO nanocomposite were also investigated to evaluate the performance of this photocatalyst. Structural investigation evidenced the formation of ZnO wurtzite structure, with a slight alteration of lattice parameters as a function of copper content. Electron microscopy images revealed a morphological evolution from spherical to rod-like shape depending on the copper content. High resolution image shows the formation of Au/Zn<sub>(1-x)</sub>Cu<sub>x</sub>O heterojunction. Au NPs increased the light absorption due to the localized surface plasmon resonance (LSPR) effect. The photocatalytic activity toward diuron molecules under simulated solar light showed that the highest pseudo-first-order rate constant was achieved at a copper concentration of 0.06%. These results highlight the importance of engineering such Cu/Au-ZnO heterojunction to enhance the photocatalytic performance of metal oxides for different applications especially for environmental remediation.</p>

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Synergistic effects of Cu-doping and Au-decoration on ZnO nanorods for photocatalytic applications

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Mohamed Ali Saidani,
  • Anis Fkiri,
  • Anis Chmangui,
  • Tariq Altalhi,
  • Mouldi Zouaoui,
  • Amine Mezni

摘要

In the present study, copper-doped hybrid Au@ZnO nanorods (Cu/Au@ZnO) were prepared via polyol mediated method using triethylene glycol (TEG). The TEG molecules act as both solvent and surfactant. The microstructural and optical properties of the resulting nanocomposites were studied. The photocatalytic activity of the prepared hybrid Cu/Au@ZnO nanocomposite were also investigated to evaluate the performance of this photocatalyst. Structural investigation evidenced the formation of ZnO wurtzite structure, with a slight alteration of lattice parameters as a function of copper content. Electron microscopy images revealed a morphological evolution from spherical to rod-like shape depending on the copper content. High resolution image shows the formation of Au/Zn(1-x)CuxO heterojunction. Au NPs increased the light absorption due to the localized surface plasmon resonance (LSPR) effect. The photocatalytic activity toward diuron molecules under simulated solar light showed that the highest pseudo-first-order rate constant was achieved at a copper concentration of 0.06%. These results highlight the importance of engineering such Cu/Au-ZnO heterojunction to enhance the photocatalytic performance of metal oxides for different applications especially for environmental remediation.