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<p>In the present work, the ZnO-TiO<sub>2</sub> hybrid heteronanostructure was prepared in a different way using commercial P25 and home-prepared TiO<sub>2</sub> nanoparticles. We have studied and compared the photocatalytic performance of P25 and home-anatase TiO<sub>2</sub> nanoparticles after incorporating an adequate amount of ZnO nanoparticles. We have demonstrated the impact of titanium dioxide dual structure (anatase and rutile) compared to the pure anatase structure for the enhancement of photocatalytic activity. We have adapted a solvothermal process for the synthesis of TiO<sub>2</sub> nanoparticles using DMSO solvent without any base or ligand molecules. After that, the combination of the ZnO-TiO<sub>2</sub> nanocomposite was conducted by ball milling technique using, in the first step, the P25 nanoparticles and, in the second step, the home-prepared TiO<sub>2</sub> nanoparticles. The structure, microstructure, and optical properties of the obtained powders were investigated by classic techniques including X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM) coupled with EDX for elemental analysis. The optical response was measured by UV–Visible spectroscopy. On the other hand, the photocatalytic activity was performed using pesticide molecules under UV light illumination. The effects of temperature, pH, and other factors were investigated to determine the optimal photocatalytic condition. The hybrid ZnO-TiO<sub>2</sub> heteronanostructure exhibited high efficiency degradation compared to both bare ZnO and TiO<sub>2</sub>. However, the creation of a heterojunction between ZnO and TiO<sub>2</sub> can increase the lifetime of the exciton electron–hole pairs and further enhance the photodegradation reaction at the ZnO/TiO<sub>2</sub> interface.</p>

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Efficiency enhancement of photocatalytic response under UV light irradiation using ZnO@TiO2 heteronanostructures

  • 期刊论文

  • 发表日期：

    2025年10月30日

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  • Mohamed Ali Saidani,
  • Anis Fkiri,
  • Khalil Abassi,
  • Tariq Altalhi,
  • Amine Mezni

摘要

In the present work, the ZnO-TiO2 hybrid heteronanostructure was prepared in a different way using commercial P25 and home-prepared TiO2 nanoparticles. We have studied and compared the photocatalytic performance of P25 and home-anatase TiO2 nanoparticles after incorporating an adequate amount of ZnO nanoparticles. We have demonstrated the impact of titanium dioxide dual structure (anatase and rutile) compared to the pure anatase structure for the enhancement of photocatalytic activity. We have adapted a solvothermal process for the synthesis of TiO2 nanoparticles using DMSO solvent without any base or ligand molecules. After that, the combination of the ZnO-TiO2 nanocomposite was conducted by ball milling technique using, in the first step, the P25 nanoparticles and, in the second step, the home-prepared TiO2 nanoparticles. The structure, microstructure, and optical properties of the obtained powders were investigated by classic techniques including X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM) coupled with EDX for elemental analysis. The optical response was measured by UV–Visible spectroscopy. On the other hand, the photocatalytic activity was performed using pesticide molecules under UV light illumination. The effects of temperature, pH, and other factors were investigated to determine the optimal photocatalytic condition. The hybrid ZnO-TiO2 heteronanostructure exhibited high efficiency degradation compared to both bare ZnO and TiO2. However, the creation of a heterojunction between ZnO and TiO2 can increase the lifetime of the exciton electron–hole pairs and further enhance the photodegradation reaction at the ZnO/TiO2 interface.