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<p>Water contamination is one of the most serious health problems worldwide nowadays. Untreated discharge of synthetic organic dyes into water supplies can have detrimental effects on the environment. These dyes make up the majority of water contaminants. Therefore, the purpose of this study is to use spinel ferrite, a novel and highly advanced catalytic material, to address this problem. Using the chemical coprecipitation method, a gadolinium-doped spinel ferrite complex Cu<sub>0.3</sub>Ni<sub>0.7</sub>Gd<sub>X</sub>Fe<sub>2-X</sub>O<sub>4</sub> (x = 0.0, 0.25, 0.5, 0.75) has been created with this goal in mind. Phase formation of the substance was confirmed by XRD analysis. The sizes of the crystallites were found to be 24.07, 23.02, 24.03, and 22.02&#xa0;nm for x = 0.0, 0.25, 0.5, and 0.75, respectively. The surface examination was carried out by FE-SEM. The synthesized nanoparticle broke down the complex structure of ammonium purpurate dye. Approximately 92% of the dye broke down with 50&#xa0;mg of the particles when exposed to tungsten light (λ ~ 700&#xa0;nm) irradiation at a pH value of 5.5 and the highest amount of doping Gd (x = 0.75), with an overall reaction time of approximately 100&#xa0;min. In this particular system, three isotherm models and their reaction kinetics were investigated. Additionally, the DPPH antioxidant activity investigation of the synthesized composite yielded a 52% inhibition percentage at x = 0.75. This work provides information on gadolinium-doped copper-nickel ferrite nanoparticles that were synthesized and utilized for the first time as an effective photocatalyst, leveraging the benefits of rare-earth doping and spinel ferrite structures to enhance activity in response to visible light.</p> Graphical Abstract <p></p>

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Photocatalytic Degradation of Ammonium Purpurate Dye Using Gadolinium-Doped Copper-Nickel Ferrite: Synthesis and Characterization

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • Mst. Nusrat Jahan,
  • Md. Hridoy Ali,
  • Shishir Kumar Dey,
  • Morsheda Akhter,
  • Md. Kamrul Hasan,
  • Md. Khairul Amin,
  • Sagar Kumar Dutta

摘要

Water contamination is one of the most serious health problems worldwide nowadays. Untreated discharge of synthetic organic dyes into water supplies can have detrimental effects on the environment. These dyes make up the majority of water contaminants. Therefore, the purpose of this study is to use spinel ferrite, a novel and highly advanced catalytic material, to address this problem. Using the chemical coprecipitation method, a gadolinium-doped spinel ferrite complex Cu0.3Ni0.7GdXFe2-XO4 (x = 0.0, 0.25, 0.5, 0.75) has been created with this goal in mind. Phase formation of the substance was confirmed by XRD analysis. The sizes of the crystallites were found to be 24.07, 23.02, 24.03, and 22.02 nm for x = 0.0, 0.25, 0.5, and 0.75, respectively. The surface examination was carried out by FE-SEM. The synthesized nanoparticle broke down the complex structure of ammonium purpurate dye. Approximately 92% of the dye broke down with 50 mg of the particles when exposed to tungsten light (λ ~ 700 nm) irradiation at a pH value of 5.5 and the highest amount of doping Gd (x = 0.75), with an overall reaction time of approximately 100 min. In this particular system, three isotherm models and their reaction kinetics were investigated. Additionally, the DPPH antioxidant activity investigation of the synthesized composite yielded a 52% inhibition percentage at x = 0.75. This work provides information on gadolinium-doped copper-nickel ferrite nanoparticles that were synthesized and utilized for the first time as an effective photocatalyst, leveraging the benefits of rare-earth doping and spinel ferrite structures to enhance activity in response to visible light.

Graphical Abstract