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<p>With the growing global demand for hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), the traditional anthraquinone process faces challenges of high energy consumption and environmental pollution, making photocatalytic technology a promising green and sustainable alternative. However, the efficiency of photocatalysis is often limited by the recombination of photogenerated electron–hole pairs. In this study, a piezoelectric effect was introduced to enhance photocatalytic H<sub>2</sub>O<sub>2</sub> synthesis by designing ZnO-based nanocomposite catalysts supported on quartz. The piezoelectric effect, triggered by ultrasonic excitation, promoted electron–hole separation, thereby improving photocatalytic efficiency. The structural characteristics of the materials were analyzed using XRD, SEM, and PFM techniques, while their photoelectrochemical performance and H<sub>2</sub>O<sub>2</sub> production were evaluated through electrochemical tests. Results showed that the ZQ-P25 catalyst, with a particle size of 25&#xa0;μm, achieved an H<sub>2</sub>O<sub>2</sub> generation rate of 1.72&#xa0;mmol&#xa0;g⁻<sup>1</sup>&#xa0;h⁻<sup>1</sup> under combined light and ultrasonic conditions, significantly outperforming smaller particle-sized catalysts. This study elucidates the enhancement mechanism of the piezoelectric effect in photocatalysis, providing new insights into the design of the photocatalyst materials and advancing the green production of H<sub>2</sub>O<sub>2</sub>.</p>

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Fine-tuning piezoelectric potential enhances self-powered quartz/ZnO microsystem for photocatalytic H2O2 production

  • 期刊论文

  • 发表日期：

    2025年2月26日

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  • Xiaojing Liu,
  • Xinyu Liao,
  • Xiangyi Wang,
  • Yi Zhang,
  • Ning Zhang

摘要

With the growing global demand for hydrogen peroxide (H2O2), the traditional anthraquinone process faces challenges of high energy consumption and environmental pollution, making photocatalytic technology a promising green and sustainable alternative. However, the efficiency of photocatalysis is often limited by the recombination of photogenerated electron–hole pairs. In this study, a piezoelectric effect was introduced to enhance photocatalytic H2O2 synthesis by designing ZnO-based nanocomposite catalysts supported on quartz. The piezoelectric effect, triggered by ultrasonic excitation, promoted electron–hole separation, thereby improving photocatalytic efficiency. The structural characteristics of the materials were analyzed using XRD, SEM, and PFM techniques, while their photoelectrochemical performance and H2O2 production were evaluated through electrochemical tests. Results showed that the ZQ-P25 catalyst, with a particle size of 25 μm, achieved an H2O2 generation rate of 1.72 mmol g⁻1 h⁻1 under combined light and ultrasonic conditions, significantly outperforming smaller particle-sized catalysts. This study elucidates the enhancement mechanism of the piezoelectric effect in photocatalysis, providing new insights into the design of the photocatalyst materials and advancing the green production of H2O2.