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<p>This study focuses on the enhancement of photocatalytic removal of selenium, specifically selenite, using carbon and silver co-doped TiO<sub>2</sub> (C-Ag-TiO<sub>2</sub>) nanoparticles under UV and natural sunlight. The synthesis of C-Ag-TiO<sub>2</sub> was achieved via a Sol-Gel method followed by thermal treatment, aiming to extend its photocatalytic activity into the visible light range and improve the removal efficiency. The prepared material was characterized by using SEM, EDS, XRD, and XPS. The optimization of experimental conditions was achieved, with a dosage of 1&#xa0;g/L of C-Ag-TiO<sub>2</sub>, pH 5, and a formic acid concentration of 50 ppm. Significant results were obtained for the kinetics and efficiency of selenite removal, highlighting the practical applicability of C-Ag-TiO<sub>2</sub> under real-world conditions. The use of C-Ag-TiO<sub>2</sub> under sunlight demonstrated considerable potential for the effective removal of selenium from water (Nearly 90%). The removal of selenite adheres to pseudo-first-order kinetics. The study’s findings suggest that the C-Ag-TiO<sub>2</sub> photocatalyst not only uphold the structural integrity and photocatalytic capabilities of TiO<sub>2</sub> but also demonstrate significant improvements in the removal of hazardous selenite from aqueous environments.</p>

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Solar-driven photocatalytic removal of selenium from polluted water using carbon and silver co-doped TiO2 nanoparticles

  • 期刊论文

  • 发表日期：

    2026年5月25日

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  • Yasser A. Shaban,
  • Radwan Kh Al-Farawati,
  • Yasar N. Kavil,
  • Hamza R. Al-Farawati,
  • Mousa Zobidi

摘要

This study focuses on the enhancement of photocatalytic removal of selenium, specifically selenite, using carbon and silver co-doped TiO2 (C-Ag-TiO2) nanoparticles under UV and natural sunlight. The synthesis of C-Ag-TiO2 was achieved via a Sol-Gel method followed by thermal treatment, aiming to extend its photocatalytic activity into the visible light range and improve the removal efficiency. The prepared material was characterized by using SEM, EDS, XRD, and XPS. The optimization of experimental conditions was achieved, with a dosage of 1 g/L of C-Ag-TiO2, pH 5, and a formic acid concentration of 50 ppm. Significant results were obtained for the kinetics and efficiency of selenite removal, highlighting the practical applicability of C-Ag-TiO2 under real-world conditions. The use of C-Ag-TiO2 under sunlight demonstrated considerable potential for the effective removal of selenium from water (Nearly 90%). The removal of selenite adheres to pseudo-first-order kinetics. The study’s findings suggest that the C-Ag-TiO2 photocatalyst not only uphold the structural integrity and photocatalytic capabilities of TiO2 but also demonstrate significant improvements in the removal of hazardous selenite from aqueous environments.