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<p>The present study includes an effective method for improving the photocatalytic performance of spinel magnesium ferrite by co-doping with nickel and chromium and by preparing its composite with MWCNTs. For this, magnesium ferrite (MgFe<sub>2</sub>O<sub>4,</sub> MF), nickel and chromium co-doped magnesium ferrite (Mg<sub>0.6</sub>Ni<sub>0.4</sub>Cr<sub>0.8</sub>Fe<sub>1.2</sub>O<sub>4</sub>, NCMF) were synthesized by sol-gel process, and CNTs based composite of co-doped MF (Mg<sub>0.6</sub>Ni<sub>0.4</sub>Cr<sub>0.8</sub>Fe<sub>1.2</sub>O<sub>4</sub>@CNTs, NCMF@CNTs) was prepared by an ultra-sonication route. The fabricated materials were physicochemically characterized using various techniques. The UV-Visible analysis showed a decrement in optical bandgap of NCMF (1.96&#xa0;eV) as compared to pure MF (2.15&#xa0;eV). The designed materials were tested as photocatalysts against the degradation of Congo red (CR) and benzoic acid (BA) under sunlight illumination. For Congo red, MF, NCMF, and NCMF@CNTs exhibited ~ 57%, 74%, and 83% degradation in 105&#xa0;min. Moreover, about 59% of BA was degraded within 105&#xa0;min by synthesized NCMF@CNTs composite. As compared to its other counter parts, the notable performance of NCMF@CNTs photocatalyst for both CR and BA could be assigned to the combined effect of moderate bandgap of NCMF (1.96&#xa0;eV) and low charge transfer resistance (1.61 Ω), low electron/hole recombination, and large surface area (27.43&#xa0;m²/g) of NCMF@CNTs. Furthermore, NCMF@CNTs (40&#xa0;mg/mL) showed 17&#xa0;mm inhibition zone for <i>S. aureus</i> and 11&#xa0;mm zone of inhibition for <i>K. pneumoniae</i>. Hence, a novel CNTs integrated nanocomposite of spinel mixed ferrite (NCMF@CNTs) could be a potential material for the degradation of harmful industrial effluents and bacterial strains.</p>

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Fabrication of MWCNTs Support on Nickel and Chromium Co-doped Magnesium Ferrite (Mg0.6Ni0.4Cr0.8Fe1.2O4): A Sustainable Approach for Efficient Photodegradation and Antibacterial Study

  • 期刊论文

  • 发表日期：

    2025年6月20日

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  • Ibrahim A. Alsafari

摘要

The present study includes an effective method for improving the photocatalytic performance of spinel magnesium ferrite by co-doping with nickel and chromium and by preparing its composite with MWCNTs. For this, magnesium ferrite (MgFe2O4, MF), nickel and chromium co-doped magnesium ferrite (Mg0.6Ni0.4Cr0.8Fe1.2O4, NCMF) were synthesized by sol-gel process, and CNTs based composite of co-doped MF (Mg0.6Ni0.4Cr0.8Fe1.2O4@CNTs, NCMF@CNTs) was prepared by an ultra-sonication route. The fabricated materials were physicochemically characterized using various techniques. The UV-Visible analysis showed a decrement in optical bandgap of NCMF (1.96 eV) as compared to pure MF (2.15 eV). The designed materials were tested as photocatalysts against the degradation of Congo red (CR) and benzoic acid (BA) under sunlight illumination. For Congo red, MF, NCMF, and NCMF@CNTs exhibited ~ 57%, 74%, and 83% degradation in 105 min. Moreover, about 59% of BA was degraded within 105 min by synthesized NCMF@CNTs composite. As compared to its other counter parts, the notable performance of NCMF@CNTs photocatalyst for both CR and BA could be assigned to the combined effect of moderate bandgap of NCMF (1.96 eV) and low charge transfer resistance (1.61 Ω), low electron/hole recombination, and large surface area (27.43 m²/g) of NCMF@CNTs. Furthermore, NCMF@CNTs (40 mg/mL) showed 17 mm inhibition zone for S. aureus and 11 mm zone of inhibition for K. pneumoniae. Hence, a novel CNTs integrated nanocomposite of spinel mixed ferrite (NCMF@CNTs) could be a potential material for the degradation of harmful industrial effluents and bacterial strains.