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Abstract <p>ZnO/Zn<sub>3</sub>N<sub>2</sub> composites were prepared through rapid heat treatment using Zn(OH)<sub>2</sub> and C<sub>3</sub>N<sub>4</sub> raw materials. This study investigated the effects of varying raw material ratios on the phase composition, microscopic morphology, and photocatalytic properties of the resulting products. The results demonstrated that Zn(OH)<sub>2</sub> decomposed rapidly into ultrafine ZnO grains at 800°C. Subsequently, the newly generated ZnO reacted with C<sub>3</sub>N<sub>4</sub> to form ZnO/Zn<sub>3</sub>N<sub>2</sub> composites. Notably, an increase in C<sub>3</sub>N<sub>4</sub> content enhanced the composites’ light absorption capacity in the visible spectrum. Moderate additions (10 and 15%) of C<sub>3</sub>N<sub>4</sub> significantly improved the photocatalytic degradation of methylene blue (MB). Specifically, the product containing 15% C<sub>3</sub>N<sub>4</sub> exhibited optimal photocatalytic performance, achieving a degradation rate of 99.1% for MB within 20 min. Finally, one possible photocatalytic reaction mechanism for ZnO/Zn<sub>3</sub>N<sub>2</sub> composites was proposed.</p>

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Rapid Thermal Treatment for Synthesizing ZnO/Zn3N2 Composites with Excellent Photocatalytic Properties

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • BaoYan Liang,
  • ShiKai Zhao,
  • XinYan Zheng,
  • Cui Lyu Lyu,
  • JiZhou Zhang,
  • YanLi Zhang,
  • QiQuan Li,
  • MingLi Jiao

摘要

Abstract

ZnO/Zn3N2 composites were prepared through rapid heat treatment using Zn(OH)2 and C3N4 raw materials. This study investigated the effects of varying raw material ratios on the phase composition, microscopic morphology, and photocatalytic properties of the resulting products. The results demonstrated that Zn(OH)2 decomposed rapidly into ultrafine ZnO grains at 800°C. Subsequently, the newly generated ZnO reacted with C3N4 to form ZnO/Zn3N2 composites. Notably, an increase in C3N4 content enhanced the composites’ light absorption capacity in the visible spectrum. Moderate additions (10 and 15%) of C3N4 significantly improved the photocatalytic degradation of methylene blue (MB). Specifically, the product containing 15% C3N4 exhibited optimal photocatalytic performance, achieving a degradation rate of 99.1% for MB within 20 min. Finally, one possible photocatalytic reaction mechanism for ZnO/Zn3N2 composites was proposed.