Scholarlink

<p>In this study, type II β-Bi<sub>2</sub>O<sub>3</sub>/Fe<sub>2</sub>TiO<sub>5</sub> nanocomposites were successfully synthesized via an in situ growth method followed by calcination on a Fe<sub>2</sub>TiO<sub>5</sub> substrate. Tauc plot analysis showed a reduction of band gap to 1.70&#xa0;eV for the composites upon heterojunction formation, suggesting improved visible light utilization. The photoluminescence (PL) spectroscopy further revealed suppressed recombination of photogenerated charge carriers in the heterostructure. Under visible light irradiation, the nanocomposite with a 1.5:1 molar ratio achieved a methylene blue (MB) degradation efficiency of 87%, significantly outperforming pristine β-Bi<sub>2</sub>O<sub>3</sub> (65.9%) and Fe<sub>2</sub>TiO<sub>5</sub> (61%). This outcome corresponds to a 2.1-fold increase in the reaction rate. Moreover, the photocatalyst exhibits excellent reusability, with only a 6% decay in activity after three consecutive cycles. The enhanced photocatalytic activity is primarily attributed to the formation of a heterojunction structure, which facilitates efficient charge carrier separation and extends light absorption. These results highlight the promising potential of the β-Bi<sub>2</sub>O<sub>3</sub>/Fe<sub>2</sub>TiO<sub>5</sub> nanocomposite for applications in environmental remediation.</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

Synthesis of β-Bi2O3/Fe2TiO5 Nanocomposites for High-Efficiency Photocatalytic Degradation of Methylene Blue

  • 期刊论文

  • 发表日期：

    2025年12月9日

查看全文
  • Shizhong Zhang,
  • Tongming Sun,
  • Ming Ge,
  • Lingli Ni,
  • Weichuan Xu

摘要

In this study, type II β-Bi2O3/Fe2TiO5 nanocomposites were successfully synthesized via an in situ growth method followed by calcination on a Fe2TiO5 substrate. Tauc plot analysis showed a reduction of band gap to 1.70 eV for the composites upon heterojunction formation, suggesting improved visible light utilization. The photoluminescence (PL) spectroscopy further revealed suppressed recombination of photogenerated charge carriers in the heterostructure. Under visible light irradiation, the nanocomposite with a 1.5:1 molar ratio achieved a methylene blue (MB) degradation efficiency of 87%, significantly outperforming pristine β-Bi2O3 (65.9%) and Fe2TiO5 (61%). This outcome corresponds to a 2.1-fold increase in the reaction rate. Moreover, the photocatalyst exhibits excellent reusability, with only a 6% decay in activity after three consecutive cycles. The enhanced photocatalytic activity is primarily attributed to the formation of a heterojunction structure, which facilitates efficient charge carrier separation and extends light absorption. These results highlight the promising potential of the β-Bi2O3/Fe2TiO5 nanocomposite for applications in environmental remediation.