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<p>Environmental pollution from organic dyes and heavy metals has garnered increasing attention, driving the development of effective treatment methods. Herein, we report a novel flake-like Bi<sub>2</sub>S<sub>3</sub>/BiOCl heterostructure (BSBOC) synthesized <i>via</i> a facile one-pot solvothermal method. Unlike conventional two-step routes, this strategy enables the in-situ growth of Bi<sub>2</sub>S<sub>3</sub> within the BiOCl framework, ensuring intimate interfacial contact for efficient charge separation. Key characterizations reveal that the optimized BSBOC-1 composite exhibits a significantly enlarged specific surface area of 22.16&#xa0;m<sup>2</sup>/g and a narrowed optical bandgap of 2.17&#xa0;eV, leading to enhanced visible-light absorption. Consequently, BSBOC-1 demonstrates superior photocatalytic performance compared to individual BiOCl and Bi<sub>2</sub>S<sub>3</sub>, achieving removal efficiencies of 92% for rhodamine B (RhB) within 30&#xa0;min and 92.5% for Cr(VI) within 60&#xa0;min under visible-light irradiation. Mechanistic studies further identify photogenerated holes, electrons, and subsequently formed superoxide radicals as the dominant active species. This study paves the way for developing advanced heterojunction photocatalysts by combining narrow and wide-bandgap nanomaterials, informing the design of next-generation materials for environmental remediation. </p> Graphical Abstract <p></p>

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One-Pot Preparation of Sheet-Like Bi2S3/BiOCl Heterostructures for Efficient Removal of RhB and Cr(VI)

  • 期刊论文

  • 发表日期：

    2026年4月6日

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  • Yuhong Wang,
  • Yong Hou,
  • Jie Mei,
  • Hu Xu,
  • Rui Zhang,
  • Bo Wang

摘要

Environmental pollution from organic dyes and heavy metals has garnered increasing attention, driving the development of effective treatment methods. Herein, we report a novel flake-like Bi2S3/BiOCl heterostructure (BSBOC) synthesized via a facile one-pot solvothermal method. Unlike conventional two-step routes, this strategy enables the in-situ growth of Bi2S3 within the BiOCl framework, ensuring intimate interfacial contact for efficient charge separation. Key characterizations reveal that the optimized BSBOC-1 composite exhibits a significantly enlarged specific surface area of 22.16 m2/g and a narrowed optical bandgap of 2.17 eV, leading to enhanced visible-light absorption. Consequently, BSBOC-1 demonstrates superior photocatalytic performance compared to individual BiOCl and Bi2S3, achieving removal efficiencies of 92% for rhodamine B (RhB) within 30 min and 92.5% for Cr(VI) within 60 min under visible-light irradiation. Mechanistic studies further identify photogenerated holes, electrons, and subsequently formed superoxide radicals as the dominant active species. This study paves the way for developing advanced heterojunction photocatalysts by combining narrow and wide-bandgap nanomaterials, informing the design of next-generation materials for environmental remediation.

Graphical Abstract