Scholarlink

<p>Photocatalytic production of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) employing water and O<sub>2</sub> exhibits an economical, environmentally friendly, and sustainable method for H<sub>2</sub>O<sub>2</sub> synthesis. However, current photocatalytic systems are hindered by poor charge carrier transport, narrow light absorption range, and insufficient active sites, resulting in unsatisfactory H<sub>2</sub>O<sub>2</sub> production efficiency. In this study, we constructed a CoS/ZIS composite by <i>in-situ</i> growing CoS nanoclusters on ZnIn<sub>2</sub>S<sub>4</sub> (ZIS) using a solvothermal method for photocatalytic H<sub>2</sub>O<sub>2</sub> production. The integration of CoS with ZIS broadened the light absorption spectrum. The optimized CoS/ZIS-3 composite exhibited an exceptional H<sub>2</sub>O<sub>2</sub> production rate of 2693.39 µmol g<sup>−1</sup> h<sup>−1</sup> upon exposure to visible light in isopropanol, surpassing ZIS and CoS by factors of 6.54 and 18.08, respectively. The S-scheme heterojunction and built-in electric field synergistically enhanced the separation and transportation of photogenerated charge carriers, thereby enhancing the photocatalytic efficiency. We elucidated the H<sub>2</sub>O<sub>2</sub> synthesis mechanism, which involves dual-channel oxygen reduction and water oxidation reactions mediated by CoS/ZIS. The produced H<sub>2</sub>O<sub>2</sub> effectively degraded organic pollutants and inhibited the growth of <i>E. coli.</i> This study presents a promising and green strategy for enhancing ZIS-based photocatalysts through constructing S-scheme heterojunctions for efficient H<sub>2</sub>O<sub>2</sub> synthesis.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Novel CoS/ZnIn2S4 S-scheme heterojunction for efficient visible-light photocatalytic H2O2 production via dual-channel reactions in air

  • 期刊论文

  • 发表日期：

    2025年12月26日

查看全文
  • Enxiang Shang,
  • Xuebing Li,
  • Xuliu Shi,
  • Xin Zhou,
  • Jiwen Li,
  • Yunjiu Cao,
  • Shijie Li

摘要

Photocatalytic production of hydrogen peroxide (H2O2) employing water and O2 exhibits an economical, environmentally friendly, and sustainable method for H2O2 synthesis. However, current photocatalytic systems are hindered by poor charge carrier transport, narrow light absorption range, and insufficient active sites, resulting in unsatisfactory H2O2 production efficiency. In this study, we constructed a CoS/ZIS composite by in-situ growing CoS nanoclusters on ZnIn2S4 (ZIS) using a solvothermal method for photocatalytic H2O2 production. The integration of CoS with ZIS broadened the light absorption spectrum. The optimized CoS/ZIS-3 composite exhibited an exceptional H2O2 production rate of 2693.39 µmol g−1 h−1 upon exposure to visible light in isopropanol, surpassing ZIS and CoS by factors of 6.54 and 18.08, respectively. The S-scheme heterojunction and built-in electric field synergistically enhanced the separation and transportation of photogenerated charge carriers, thereby enhancing the photocatalytic efficiency. We elucidated the H2O2 synthesis mechanism, which involves dual-channel oxygen reduction and water oxidation reactions mediated by CoS/ZIS. The produced H2O2 effectively degraded organic pollutants and inhibited the growth of E. coli. This study presents a promising and green strategy for enhancing ZIS-based photocatalysts through constructing S-scheme heterojunctions for efficient H2O2 synthesis.