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Sol–gel derived iron-manganese oxide nanoparticles: a promising dual-functional material for solar photocatalysis and antimicrobial applications

  • Original Paper: Sol-gel and hybrid materials for catalytic, photoelectrochemical and sensor applications
  • Published:
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Abstract

In this study, cubic bixbyite FeMnO3 oxide nanoparticles were synthesized via a one-pot co-precipitation method. The effects of calcination temperature on the nanoparticles structural, optical, and morphological properties were investigated by calcining them at 700, 900, and 1100 °C in air for 2 h, which resulted in significant changes in their structural and optical properties. Fourier transform infrared spectroscopy confirmed the presence of Fe–O and Mn–O stretching vibrations and X-ray diffraction analysis showed that the nanoparticles transformed from an amorphous to a crystalline phase upon calcination. Moreover, when the nanoparticles were calcined at higher temperatures, they displayed strong absorption in the visible and near-infrared regions, which resulted in a notable redshift in the optical band gap from 2.41 to 1.53 eV. Photocatalytic experiments demonstrated the nanoparticles excellent degradation capability in removing methylene blue from water under solar light irradiation. Specifically, the nanoparticles calcined at 1100 °C exhibited the highest photocatalytic efficiency with a maximum photo-degradation rate of 91%. Additionally, the nanoparticles displayed good antibacterial activity against Bacillus meurellus, Acetobactor rhizospherensis, Escherichia coli but were less effective against Bacillus subtilis.

Graphical abstract

The XRD patterns of Fe-Mn binary oxide (FeMnO3) nanoparticles (left side of figure) indicate a transformation from an amorphous to a crystalline structure. In the middle figure, the photodegradation of methylene blue is depicted at various time intervals using FeMnO3 photocatalyst under sunlight irradiation. Additionally, the proposed mechanism for the degradation of methylene blue is also illustrated on the right side figure.

Highlights

  • Fe-Mn binary oxide with cubic bixbyite structure was successfully prepared via co-precipitation method.

  • Nanoparticles displays strong absorption in visible and near IR regions.

  • Optical bandgap significantly reduces with calcination temperature.

  • Fe-Mn binary oxide exhibits excellent multifunctional properties as solar light photocatalyst and antibacterial agent.

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Data availability

The datasets generated and analyzed during this study are available from the corresponding author upon reasonable request.

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Authors and Affiliations

  1. Department of Physics, Government College University, Lahore, 54000, Pakistan

    Dilawar Ali & M. Z. Butt

  2. Department of Chemistry, University of Engineering and Technology, Lahore, 54890, Pakistan

    Iqra Muneer

  3. Central Research Laboratories, Lahore College for Women University, Lahore, 54000, Pakistan

    F. Bashir

  4. Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia

    Anjam Waheed & M. F. Mohd Razip Wee

  5. Department of Botany, Government College University, Lahore, 54000, Pakistan

    M. Hanif

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All authors have participated in the research activities of this paper. DA, IM, FB, MZB, AW, MH, MFMRW performed material preparation, data collection and analysis. The first draft of the manuscript was written by DA and IM, and all authors have commented on previous editions. MZB, MFMRW revised the English grammar of the original manuscript. All authors read and approved the final manuscript.

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Ali, D., Muneer, I., Bashir, F. et al. Sol–gel derived iron-manganese oxide nanoparticles: a promising dual-functional material for solar photocatalysis and antimicrobial applications. J Sol-Gel Sci Technol 107, 452–466 (2023). https://doi.org/10.1007/s10971-023-06123-9

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