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<p>To address the urgent need for water environment purification and clean water production, this study proposes a strategy to construct a hydrophobic S-scheme heterojunction KTaO<sub>3</sub>/BiOI. This strategy extends the light response range of KTaO<sub>3</sub> from the ultraviolet (UV) region to the visible light region and achieves efficient carrier separation capability, thereby enabling selective degradation of water-soluble components in sewage. After 5 cycles of indoor photodegradation, the degradation efficiency of Rhodamine B (Rh B) reached 91.84%, while 2 cycles of outdoor photodegradation achieved an efficiency of 97.11%. Additionally, the degradation efficiency for methylene blue (MB) attained 98.26%. Meanwhile, the constructed superhydrophobic canvas exhibits excellent selective adsorption performance for water-insoluble floating pollutants such as cyclohexane. Based on the construction of a superhydrophobic interface and an S-scheme heterojunction, simultaneous oil-water separation and photocatalytic degradation are realized. Through Kelvin probe force microscopy (KPFM) and theoretical calculation analyses, the S-scheme charge transfer mechanism between KTaO<sub>3</sub> and BiOI is systematically confirmed. This work shows broad application prospects in the treatment of oil-containing wastewater.</p>

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Interface hydrophobic modification of the KTaO3/BiOI heterojunction and its water pollution treatment

  • 期刊论文

  • 发表日期：

    2026年1月12日

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  • Jianbo Zhang,
  • Zhenjie Ma,
  • Yutian Wang,
  • Bo Ge,
  • Tonghui Zhang,
  • Hui Zhao,
  • Guina Ren,
  • Zhaozhu Zhang

摘要

To address the urgent need for water environment purification and clean water production, this study proposes a strategy to construct a hydrophobic S-scheme heterojunction KTaO3/BiOI. This strategy extends the light response range of KTaO3 from the ultraviolet (UV) region to the visible light region and achieves efficient carrier separation capability, thereby enabling selective degradation of water-soluble components in sewage. After 5 cycles of indoor photodegradation, the degradation efficiency of Rhodamine B (Rh B) reached 91.84%, while 2 cycles of outdoor photodegradation achieved an efficiency of 97.11%. Additionally, the degradation efficiency for methylene blue (MB) attained 98.26%. Meanwhile, the constructed superhydrophobic canvas exhibits excellent selective adsorption performance for water-insoluble floating pollutants such as cyclohexane. Based on the construction of a superhydrophobic interface and an S-scheme heterojunction, simultaneous oil-water separation and photocatalytic degradation are realized. Through Kelvin probe force microscopy (KPFM) and theoretical calculation analyses, the S-scheme charge transfer mechanism between KTaO3 and BiOI is systematically confirmed. This work shows broad application prospects in the treatment of oil-containing wastewater.