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<p>The g-C<sub>3</sub>N<sub>4</sub>/Bi<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>/TiO<sub>2</sub> (CBT) ternary heterojunction was synthesized via a solvothermal method by incorporating g-C<sub>3</sub>N<sub>4</sub> onto the Bi<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>/TiO<sub>2</sub> matrix. This construction created a secondary flow characteristic for photogenerated electrons within the CBT interface. The photocatalytic activity of the prepared materials was assessed using Cr(VI) aqueous solution as a model pollutant. Experimental results demonstrated that CBT-10 achieved a 95% reduction rate of Cr(VI), with a reaction rate constant of 0.0242&#xa0;min<sup>−1</sup>, which is 5.2 times and 5.0 times higher than that of g-C<sub>3</sub>N<sub>4</sub> (0.0047&#xa0;min<sup>−1</sup>) and Bi<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>/TiO<sub>2</sub> (0.0048&#xa0;min<sup>−1</sup>), respectively. This significant enhancement in Cr(VI) photocatalytic performance can be attributed to the secondary transport mechanism of photogenerated electrons across the CBT heterojunctions, leading to effective charge carrier separation in the bulk phase. The synthesis and application of g-C<sub>3</sub>N<sub>4</sub>/Bi<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>/TiO<sub>2</sub> represent a novel approach to developing efficient photocatalysts.</p>

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Construction of a Novel g-C3N4/Bi2Ti2O7/TiO2 Ternary Heterojunction for Efficient Visible Light-Driven Reduction of Cr(VI)

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Yuanyuan Luo,
  • Shichen Dai,
  • Anting Wei,
  • Manqiu Sang,
  • Yumin Zhou,
  • Zhi Zhang,
  • Yinxing Jiang,
  • Zhao Li,
  • Lin Tian,
  • Jing Li

摘要

The g-C3N4/Bi2Ti2O7/TiO2 (CBT) ternary heterojunction was synthesized via a solvothermal method by incorporating g-C3N4 onto the Bi2Ti2O7/TiO2 matrix. This construction created a secondary flow characteristic for photogenerated electrons within the CBT interface. The photocatalytic activity of the prepared materials was assessed using Cr(VI) aqueous solution as a model pollutant. Experimental results demonstrated that CBT-10 achieved a 95% reduction rate of Cr(VI), with a reaction rate constant of 0.0242 min−1, which is 5.2 times and 5.0 times higher than that of g-C3N4 (0.0047 min−1) and Bi2Ti2O7/TiO2 (0.0048 min−1), respectively. This significant enhancement in Cr(VI) photocatalytic performance can be attributed to the secondary transport mechanism of photogenerated electrons across the CBT heterojunctions, leading to effective charge carrier separation in the bulk phase. The synthesis and application of g-C3N4/Bi2Ti2O7/TiO2 represent a novel approach to developing efficient photocatalysts.