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<p>Terbium-doped MoO<sub>3</sub> (Tb/MoO<sub>3</sub>) nanoparticles were synthesized via a green method using <i>Adenanthera pavonina</i> leaf extract. Structural, optical, and morphological properties were investigated using X-ray diffraction, Fourier-Transform Infrared, Thermogravimetric, UV-Visible Diffuse Reflectance Spectroscopy, Transmission Electron Microscopy, Scanning Electron Microscopy – Energy Dispersive X-ray, and X-ray Photoelectron Spectroscopy analyses. TEM images revealed agglomerated spherical particles with an average size of ~19 nm. Tb doping reduced crystallinity and narrowed the band gap to 2.1 eV, enhancing visible light absorption. Photocatalytic degradation of Congo red, Brilliant green, and Nile blue A dyes achieved efficiencies of 87.6%, 90.8%, and 86.4% respectively within 120 min, following pseudo-first-order kinetics. Antibacterial studies showed strong inhibition against <i>Staphylococcus aureus</i> and <i>Pseudomonas aeruginosa</i>, with zones up to 20 mm, attributed to ROS-mediated membrane disruption. The catalyst retained ~80% efficiency after five reuse cycles. These findings confirm the dual-functional potential of Tb/MoO<sub>3</sub> for sustainable wastewater treatment and antimicrobial applications.</p> Graphical Abstract <p></p>

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Dual-functionality of terbium-doped MoO3 semiconductor nanomaterials for degradation of synthetic textile dyes and antimicrobial activity

  • 期刊论文

  • 发表日期：

    2025年7月22日

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  • Divya T,
  • Vishalee S,
  • Prashanna Suvaitha S,
  • Venkatachalam K

摘要

Terbium-doped MoO3 (Tb/MoO3) nanoparticles were synthesized via a green method using Adenanthera pavonina leaf extract. Structural, optical, and morphological properties were investigated using X-ray diffraction, Fourier-Transform Infrared, Thermogravimetric, UV-Visible Diffuse Reflectance Spectroscopy, Transmission Electron Microscopy, Scanning Electron Microscopy – Energy Dispersive X-ray, and X-ray Photoelectron Spectroscopy analyses. TEM images revealed agglomerated spherical particles with an average size of ~19 nm. Tb doping reduced crystallinity and narrowed the band gap to 2.1 eV, enhancing visible light absorption. Photocatalytic degradation of Congo red, Brilliant green, and Nile blue A dyes achieved efficiencies of 87.6%, 90.8%, and 86.4% respectively within 120 min, following pseudo-first-order kinetics. Antibacterial studies showed strong inhibition against Staphylococcus aureus and Pseudomonas aeruginosa, with zones up to 20 mm, attributed to ROS-mediated membrane disruption. The catalyst retained ~80% efficiency after five reuse cycles. These findings confirm the dual-functional potential of Tb/MoO3 for sustainable wastewater treatment and antimicrobial applications.

Graphical Abstract