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<p>Researchers in environmental science have concentrated on eliminating bisphenol A, a pollutant known to disrupt endocrine function with estrogenic effects. This research explores the photodegradation of bisphenol A in an aqueous solution utilizing as-synthesized photocatalyst under exposure to sunlight and UVA. Characterization techniques including PL, SEM, UV–visible DRS, EDX, Mapping, FTIR, XRD, and VSM confirmed the superparamagnetic behavior (12.07&#xa0;emu/g) and anatase TiO<sub>2</sub> phase of the nanocomposite, with a bandgap energy of 3.01&#xa0;eV. Photocatalytic degradation experiments, conducted using response surface methodology, demonstrated that the highest removal of bisphenol A under sunlight radiation was 74%, compared to 55% under UVA light radiation, under the following optimal conditions: photocatalyst dosage of 1g/l, pH 8, and bisphenol A concentration of 50&#xa0;mg/L after 220&#xa0;min. The photocatalyst demonstrated durability, maintaining 50% degradation efficiency over five cycles without significant loss of activity. These results indicate the potential of Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> for effective BPA removal using both UVA and solar light, presenting an appealing approach for treating phenolic wastewater with solar energy.</p> Graphical Abstract <p></p>

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Evaluation of Photocatalytic Degradation of Bisphenol A by Reusable Fe3O4/SiO2/TiO2 Magnetic Nanocomposite: Optimization by Response Surface Methodology

  • 期刊论文

  • 发表日期：

    2025年2月11日

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  • Saeed Aghel,
  • Nader Bahramifar,
  • Habibollah Younesi,
  • Mahdi Tanha Ziyarati

摘要

Researchers in environmental science have concentrated on eliminating bisphenol A, a pollutant known to disrupt endocrine function with estrogenic effects. This research explores the photodegradation of bisphenol A in an aqueous solution utilizing as-synthesized photocatalyst under exposure to sunlight and UVA. Characterization techniques including PL, SEM, UV–visible DRS, EDX, Mapping, FTIR, XRD, and VSM confirmed the superparamagnetic behavior (12.07 emu/g) and anatase TiO2 phase of the nanocomposite, with a bandgap energy of 3.01 eV. Photocatalytic degradation experiments, conducted using response surface methodology, demonstrated that the highest removal of bisphenol A under sunlight radiation was 74%, compared to 55% under UVA light radiation, under the following optimal conditions: photocatalyst dosage of 1g/l, pH 8, and bisphenol A concentration of 50 mg/L after 220 min. The photocatalyst demonstrated durability, maintaining 50% degradation efficiency over five cycles without significant loss of activity. These results indicate the potential of Fe3O4/SiO2/TiO2 for effective BPA removal using both UVA and solar light, presenting an appealing approach for treating phenolic wastewater with solar energy.

Graphical Abstract