硅酸盐通报2025，Vol.44Issue(5)：1918-1926,9.DOI:10.16552/j.cnki.issn1001-1625.2024.1373
Bi/TiO2∶Sm3+复合纤维的制备及可见光催化降解抗生素洛美沙星
Preparation of Bi/TiO2∶Sm3+Composite Fibers and Visible Light Photocatalytic Degradation of Antibiotic Lomofloxacin
摘要
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.关键词
Bi/TiO2∶Sm3+复合纤维/洛美沙星/表面等离子体共振/稀土离子掺杂/可见光催化活性Key words
Bi/TiO2∶Sm3+composite fiber/lomofloxacin/surface plasmon resonance/rare earth ion doping/visible light photocatalytic activity分类
化学引用本文复制引用
李跃军,曹铁平,孙大伟..Bi/TiO2∶Sm3+复合纤维的制备及可见光催化降解抗生素洛美沙星[J].硅酸盐通报,2025,44(5):1918-1926,9.基金项目
国家自然科学基金(21573003) （21573003）
吉林省自然科学基金(201205034,20140101118JC) （201205034,20140101118JC）
