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<p>This study investigates the synthesis of ZrO<sub><i>x</i></sub>-loaded NiFe<sub>2</sub>O<sub>4</sub> photocatalysts (1, 2, and 3 wt%) through co-precipitation and wet impregnation methods for environmental and health applications. The structural analysis revealed a cubic crystal structure, with ZrO<sub><i>x</i></sub> doping enhancing charge separation and mobility by converting the morphology from fibrous to needle-like. Under visible light (VL) and H<sub>2</sub>O<sub>2</sub> activation, the ZrO<sub><i>x</i></sub>(3 wt%)/NiFe<sub>2</sub>O<sub>4</sub> composite achieved high degradation efficiencies (98.5% for Bisphenol A and 98.2% for 4-Nitrophenol) in 120 min via the Photo-Fenton mechanism. Kinetic analysis showed pseudo-first-order behavior with rate constants of 0.945 min<sup>−1</sup> for BPA and 0.904 min<sup>−1</sup> for 4-NP. The catalyst demonstrated stability with 91.5% efficiency retention after multiple cycles. DFT calculations indicated favorable HOMO-LUMO alignments and electrostatic potentials. Additionally, ZrO<sub><i>x</i></sub>(3 wt%)/NiFe<sub>2</sub>O<sub>4</sub> exhibited selective cytotoxicity against breast cancer cell lines, while maintaining high viability in HEK-293 cells. The results suggest that ZrO<sub><i>x</i></sub>(3 wt%)/NiFe<sub>2</sub>O<sub>4</sub> composites are promising for environmental and biomedical applications.</p><p></p>

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Needle ZrOx loaded NiFe2O4 catalysts for Photo-Fenton degradation of bisphenol A and 4 nitrophenol

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月3日

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  • Velu Manikandan,
  • Duraisamy Elango,
  • Velu Subash,
  • Ponnuchamy Kumar,
  • Jeyakumar Saranya Packialakshmi,
  • Palaniyappan Jayanthi,
  • You Jae Sun,
  • Kwang Soup Song

摘要

This study investigates the synthesis of ZrOx-loaded NiFe2O4 photocatalysts (1, 2, and 3 wt%) through co-precipitation and wet impregnation methods for environmental and health applications. The structural analysis revealed a cubic crystal structure, with ZrOx doping enhancing charge separation and mobility by converting the morphology from fibrous to needle-like. Under visible light (VL) and H2O2 activation, the ZrOx(3 wt%)/NiFe2O4 composite achieved high degradation efficiencies (98.5% for Bisphenol A and 98.2% for 4-Nitrophenol) in 120 min via the Photo-Fenton mechanism. Kinetic analysis showed pseudo-first-order behavior with rate constants of 0.945 min−1 for BPA and 0.904 min−1 for 4-NP. The catalyst demonstrated stability with 91.5% efficiency retention after multiple cycles. DFT calculations indicated favorable HOMO-LUMO alignments and electrostatic potentials. Additionally, ZrOx(3 wt%)/NiFe2O4 exhibited selective cytotoxicity against breast cancer cell lines, while maintaining high viability in HEK-293 cells. The results suggest that ZrOx(3 wt%)/NiFe2O4 composites are promising for environmental and biomedical applications.