• Bulletin of the Chinese Ceramic Society
  • Vol. 44, Issue 5, 1918 (2025)
LI Yuejun1, CAO Tieping1,2,*, and SUN Dawei2
Author Affiliations
  • 1School of Medicine, Hainan Vocational University of Science and Technology, Haikou 570100, China
  • 2College of Chemistry, Baicheng Normal University, Baicheng 137000, China
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    DOI: 10.16552/j.cnki.issn1001-1625.2024.1373 Cite this Article
    LI Yuejun, CAO Tieping, SUN Dawei. Preparation of Bi/TiO2∶Sm3+ Composite Fibers and Visible Light Photocatalytic Degradation of Antibiotic Lomofloxacin[J]. Bulletin of the Chinese Ceramic Society, 2025, 44(5): 1918 Copy Citation Text show less

    Abstract

    TiO2∶Sm3+ nanofibers were prepared by electrospinning technology, and Bi/TiO2∶Sm3+ composite fibers were synthesized by in-situ hydrothermal method under the action of sodium gluconate. The phase and composition of samples were characterized by XRD and XPS. The microstructure of samples was observed by SEM and TEM. The photoelectric properties of samples were analyzed by UV-Vis diffuse reflectance spectroscopy and transient photocurrent. The results show that Sm3+ enters the TiO2 lattice and occupies the position of Ti4+, resulting in the expansion and distortion of TiO2 lattice. The lattice defects introduced by rare earth doping can increase the Fermi level of TiO2, increase the surface energy barrier, and reduce the recombination probability of photogenerated electrons and holes on the surface. Metal Bi, through the surface plasmon resonance effect, combined with the rich energy level structure and 4f electron transition characteristics of rare earth elements, the double modification of TiO2 is carried out to further improve the photocatalytic activity and stability of TiO2. Under visible light irradiation for 5 h, the degradation effect of Bi/TiO2∶Sm3+ composite fiber for lomefloxacin is the best, reaching 97.37%, which is 1.7 times and 1.3 times that of Sm3+∶TiO2 and Bi/TiO2, respectively.
    LI Yuejun, CAO Tieping, SUN Dawei. Preparation of Bi/TiO2∶Sm3+ Composite Fibers and Visible Light Photocatalytic Degradation of Antibiotic Lomofloxacin[J]. Bulletin of the Chinese Ceramic Society, 2025, 44(5): 1918
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