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<p>The study reports the eco – friendly fabrication and description of selenium–cerium bimetallic nanoparticles (SeCe BNPs) using <i>Cinnamomum Camphora</i> foliage extract. The emergence of SeCe BNPs was established by “UV visible” spectroscopy via observable pigment changes and Surface Plasmon Resonance peaks at 250&#xa0;nm and 650&#xa0;nm. Powder X–ray diffraction pattern (PXRD) and selected area electron diffraction (SAED) affirm an amorphous structure. Scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR - TEM) identified spherical nanoparticles with an average diameter of 60&#xa0;nm, exhibiting agglomeration behaviour. Dynamic light scattering (DLS) indicated high stability and a polydispersion composition, while zeta potential analysis confirmed good dispersion. The FT-IR analysis detected significant phytochemicals responsible for reduction and capping. X–ray photoelectron spectroscopy (XPS) ascertained the existence of selenium and cerium along with their respective oxidation states. BET analysis showed a specific surface area of 2.5m<sup>2</sup>/g, indicating suitability for photo-catalytic applications. Under visible light irradiation, these nanoparticles achieved 97% deterioration of brilliant green dye beyond 120&#xa0;min. Catalytic performance varied with dye concentration, catalyst dosage, p<sup>H,</sup> and temperature. The degradation process was accompanied by both pseudo-first-order and pseudo-second-order kinetics, while chemisorption followed a pseudo-second-order mechanism, suggesting chemisorption. The SeCe BNPs exhibited strong bactericidal activity against Gram–negative bacteria and demonstrated enhanced anticancer potential at higher concentrations, making them promising for biomedical applications. This is the first report on the green synthesis of SeCeBNPs using camphora extract for environmental remediation.</p>

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Biogenic Synthesis and Functional Evaluation of Se–Ce Bimetallic Nanoparticles for Photocatalysis and Cancer Therapy

  • 期刊论文

  • 发表日期：

    2025年11月30日

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  • M. Sindhu Devi,
  • Mokhtar Hjiri,
  • A. Muthuvel,
  • A. Muniyappan,
  • R. Rathika,
  • S. Srinivasan,
  • Nazir Mustapha

摘要

The study reports the eco – friendly fabrication and description of selenium–cerium bimetallic nanoparticles (SeCe BNPs) using Cinnamomum Camphora foliage extract. The emergence of SeCe BNPs was established by “UV visible” spectroscopy via observable pigment changes and Surface Plasmon Resonance peaks at 250 nm and 650 nm. Powder X–ray diffraction pattern (PXRD) and selected area electron diffraction (SAED) affirm an amorphous structure. Scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR - TEM) identified spherical nanoparticles with an average diameter of 60 nm, exhibiting agglomeration behaviour. Dynamic light scattering (DLS) indicated high stability and a polydispersion composition, while zeta potential analysis confirmed good dispersion. The FT-IR analysis detected significant phytochemicals responsible for reduction and capping. X–ray photoelectron spectroscopy (XPS) ascertained the existence of selenium and cerium along with their respective oxidation states. BET analysis showed a specific surface area of 2.5m2/g, indicating suitability for photo-catalytic applications. Under visible light irradiation, these nanoparticles achieved 97% deterioration of brilliant green dye beyond 120 min. Catalytic performance varied with dye concentration, catalyst dosage, pH, and temperature. The degradation process was accompanied by both pseudo-first-order and pseudo-second-order kinetics, while chemisorption followed a pseudo-second-order mechanism, suggesting chemisorption. The SeCe BNPs exhibited strong bactericidal activity against Gram–negative bacteria and demonstrated enhanced anticancer potential at higher concentrations, making them promising for biomedical applications. This is the first report on the green synthesis of SeCeBNPs using camphora extract for environmental remediation.