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<p>Although pure BiPO<sub>4</sub> and ZnWO<sub>4</sub> exhibit limited degradation efficiency for Rhodamine B (RhB), methyl blue (MB), and basic fuchsin (BF), the degradation rates of the BiPO<sub>4</sub> and ZnWO<sub>4</sub> composite (2ZW:BP) were significantly enhanced. Specifically, the rates were 133.8 and 99.1 times higher for RhB, 6.33 and 18.51 times higher for MB, and 18.3 and 19.12 times higher for BF, compared to BiPO<sub>4</sub> and ZnWO<sub>4</sub>, respectively. The 2ZW:BP composite achieved degradation efficiencies of 91.4%, 92.8%, and 96.5% for RhB, MB, and BF within 100&#xa0;min, 5&#xa0;h, and 3&#xa0;h under irradiation with a 5W LED lamp. Scanning electron microscopy (SEM) analysis revealed that although both BiPO<sub>4</sub> and ZnWO<sub>4</sub> exhibit rod-like morphologies, the ZnWO<sub>4</sub>/BiPO<sub>4</sub> heterostructures formed through one-step hydrothermal recombination were sheet-like. This morphological transformation was accompanied by increased oxygen vacancies, enhanced charge-hole separation efficiency, a broader light absorption range, and improved dye adsorption rates, thereby significantly enhancing the photocatalytic performance of ZnWO<sub>4</sub>/BiPO<sub>4</sub>.</p>

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Enhanced performance for dyes degradation over ZnWO4/BiPO4 heterojunction

  • 期刊论文

  • 发表日期：

    2025年1月28日

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  • Zi-Yi Gao,
  • Yan Zhou,
  • Fu Ma,
  • Wen-fei Dong,
  • Xiao-shan Miao,
  • Hong-jian Zhao

摘要

Although pure BiPO4 and ZnWO4 exhibit limited degradation efficiency for Rhodamine B (RhB), methyl blue (MB), and basic fuchsin (BF), the degradation rates of the BiPO4 and ZnWO4 composite (2ZW:BP) were significantly enhanced. Specifically, the rates were 133.8 and 99.1 times higher for RhB, 6.33 and 18.51 times higher for MB, and 18.3 and 19.12 times higher for BF, compared to BiPO4 and ZnWO4, respectively. The 2ZW:BP composite achieved degradation efficiencies of 91.4%, 92.8%, and 96.5% for RhB, MB, and BF within 100 min, 5 h, and 3 h under irradiation with a 5W LED lamp. Scanning electron microscopy (SEM) analysis revealed that although both BiPO4 and ZnWO4 exhibit rod-like morphologies, the ZnWO4/BiPO4 heterostructures formed through one-step hydrothermal recombination were sheet-like. This morphological transformation was accompanied by increased oxygen vacancies, enhanced charge-hole separation efficiency, a broader light absorption range, and improved dye adsorption rates, thereby significantly enhancing the photocatalytic performance of ZnWO4/BiPO4.