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ENHANCED PLASMONIC ACTIVITY IN AG-MODIFIED MnO2/SiO2 SPHERES FOR RAPID MITIGATION OF ANTIBIOTIC RESISTANCE

Author

Listed:
  • KASIMAYAN UMA

    (Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan)

  • YU-HUNG CHEN

    (��Department of Microelectronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan)

  • YU-CHING CHEN

    (Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan)

  • XIU-JIA GUAN

    (��Organic Electronics Research Center, Ming Chi University of Technology, New Taipei City, Taiwan)

  • ZONG-LIANG TSENG

    (��Organic Electronics Research Center, Ming Chi University of Technology, New Taipei City, Taiwan)

  • LUNG-CHIEN CHEN

    (Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan)

  • SHUN-HSYUNG CHANG

    (��Department of Microelectronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan)

Abstract

Ternary SiO2/MnO2–Ag composites were synthesized and evaluated as photocatalysts for the degradation of antibiotic Tetracycline (TC) in aqueous solution. Morphological and optical analyses demonstrated that MnO2 nanoparticles were efficiently tailored on the adsorbed sites of SiO2 spheres, while plasmonic metallic silver nanoparticles (Ag NPs) were coated on the surface of the SiO2/MnO2 composite. The SiO2/MnO2–Ag ternary composition, as obtained, exhibited remarkable photocatalytic activity in the degradation of TC (91.3%) antibiotic, surpassing the performance of individual SiO2, MnO2, and SiO2/MnO2 catalysts. This higher photocatalytic efficiency is primarily attributed to two key factors: enhanced photo-absorption capabilities facilitated by the presence of Ag nanoparticles, and the substantial mitigation of photoinduced electron and hole recombination through efficient charge transfer at the Schottky junction. SiO2 plays a pivotal role by acting as a template that accelerates the separation of electron–hole pairs, while Ag metal serves as an electron sink, thereby bolstering interfacial charge transfer.

Suggested Citation

  • Kasimayan Uma & Yu-Hung Chen & Yu-Ching Chen & Xiu-Jia Guan & Zong-Liang Tseng & Lung-Chien Chen & Shun-Hsyung Chang, 2025. "ENHANCED PLASMONIC ACTIVITY IN AG-MODIFIED MnO2/SiO2 SPHERES FOR RAPID MITIGATION OF ANTIBIOTIC RESISTANCE," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 32(07), pages 1-8, July.
    • Handle: RePEc:wsi:srlxxx:v:32:y:2025:i:07:n:s0218625x25400025
    DOI: 10.1142/S0218625X25400025
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    Keywords

    Photocatalysis; SiO2 sphere; MnO2; plasmonic silver; antibiotics;
    All these keywords.

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