Scholarlink

<p>Photocatalysis is one of the most advanced oxidation processes for the degradation of pollutants in contaminated water. Semiconductors are frequently used as catalysts in photocatalytic oxidation reactions due to their low cost and high photocatalytic efficiency. One of most active areas of photocatalysis research is the use of nanoscale semiconductors, commonly known as ferrites, as photocatalysts. Ferrites have special properties in terms of size, surface, grain boundary, and quantum tunneling effects. The purpose of this research is to synthesize a novel ferrite series doped with various rare-earth metals for the photocatalytic treatment of selected environmental pollutants in aquatic environments, and to study their characterization. The auto-combustion sol–gel method was employed to synthesize the desired ferrite series i.e., Li<sub>0.10</sub>Mn<sub>0.80</sub>Fe<sub>(2.10-<i>X</i>)</sub>La<sub>(<i>x</i>)</sub>O<sub>4</sub>, where <i>x</i>&#xa0;=&#xa0;0.00, 0.01, 0.03, 0.05, 0.07, and 0.09. The characterization of the synthesized material was carried out using XRD, FTIR, I–V, and LCR measurements. XRD analysis confirmed that all six samples exhibit a cubic spinel structure. The observed range of average particle sizes remained within 29–35&#xa0;nm, confirming the nanocrystalline nature of the ferrites. FTIR analysis indicated no disturbance in the spinal structure, even after doping with various concentrations of lanthanum. At low frequencies, a higher dielectric constant was recorded, but, as the frequency increased, a sharp downward trend in the dielectric constant value was noticed, which conforms to Maxwell Wagner's polarization and Koop’s phenomenological model. The abnormal dielectric behavior indicates the formation of small polarons in the synthesized nano-ferrite samples. Photocatalytic degradation of up to 84% methylene blue was achieved in 120&#xa0;min under sunlight. These findings suggest that the synthesized ferrite series are viable photocatalysts for the practical treatment of dye-contaminated wastewater.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigation of Structural and Optical Properties of La-Doped Li-Mn Ferrite (Li0.10 Mn0.80 Fe2.10-xLaxO4) for Wastewater Treatment Applications

  • 期刊论文

  • 发表日期：

    2025年7月23日

查看全文
  • Omer Rasheed Khan,
  • Muhammad Ibrahim,
  • Ghazala,
  • Abid Mahmood

摘要

Photocatalysis is one of the most advanced oxidation processes for the degradation of pollutants in contaminated water. Semiconductors are frequently used as catalysts in photocatalytic oxidation reactions due to their low cost and high photocatalytic efficiency. One of most active areas of photocatalysis research is the use of nanoscale semiconductors, commonly known as ferrites, as photocatalysts. Ferrites have special properties in terms of size, surface, grain boundary, and quantum tunneling effects. The purpose of this research is to synthesize a novel ferrite series doped with various rare-earth metals for the photocatalytic treatment of selected environmental pollutants in aquatic environments, and to study their characterization. The auto-combustion sol–gel method was employed to synthesize the desired ferrite series i.e., Li0.10Mn0.80Fe(2.10-X)La(x)O4, where x = 0.00, 0.01, 0.03, 0.05, 0.07, and 0.09. The characterization of the synthesized material was carried out using XRD, FTIR, I–V, and LCR measurements. XRD analysis confirmed that all six samples exhibit a cubic spinel structure. The observed range of average particle sizes remained within 29–35 nm, confirming the nanocrystalline nature of the ferrites. FTIR analysis indicated no disturbance in the spinal structure, even after doping with various concentrations of lanthanum. At low frequencies, a higher dielectric constant was recorded, but, as the frequency increased, a sharp downward trend in the dielectric constant value was noticed, which conforms to Maxwell Wagner's polarization and Koop’s phenomenological model. The abnormal dielectric behavior indicates the formation of small polarons in the synthesized nano-ferrite samples. Photocatalytic degradation of up to 84% methylene blue was achieved in 120 min under sunlight. These findings suggest that the synthesized ferrite series are viable photocatalysts for the practical treatment of dye-contaminated wastewater.