光催化
降级(电信)
材料科学
锐钛矿
土霉素
化学工程
金红石
静电纺丝
纳米技术
催化作用
化学
复合材料
聚合物
有机化学
抗生素
电信
生物化学
计算机科学
工程类
作者
Luis Roberto Ruiz-Ramírez,Jonatan Torres-Pérez,Nahúm Andrés Medellín-Castillo,Simón Yobanny Reyes-López
标识
DOI:10.1016/j.solidstatesciences.2023.107188
摘要
The contamination and dispersion of antibiotics into the environment through effluents from sewage treatment plants have produced serious consequences like the generation of resistant bacteria, generating a health emergency, so the need arises to develop processes to eliminate antibiotics in effluents. One of the methodologies used is advanced oxidation where a complete degradation of antibiotics can be reached, among the advanced oxidation processes, photocatalysis stands out as an efficient degradation pathway of organic pollutants from a photocatalyst. In the present investigation SiO2–TiO2 fibers were obtained by sol-gel and electrospinning techniques which had a cylindrical morphology and a smooth surface free of defects with a diameter 266 ± 62 nm. In increasing photocatalytic properties, the SiO2–TiO2 fibers were doped with silver by electrodeposition resulting in the deposition of particles with a branched dendritic morphology with a size of approximately 1 μm. The characterization of SiO2–TiO2–Ag fibers by infrared in the fibers eluted bands characteristic of the Si–O–Si and Ti–O–Ti bonds, and by means of the X-ray diffraction were identified crystalline phases corresponding to the anatase and rutile of the Titania, as well as face-centered cubic silver. Oxytetracycline was used as a contaminant to investigate the photocatalytic performance of SiO2–TiO2–Ag material, where from an initial concentration of 30 ppm in the presence of SiO2–TiO2 fibers its degradation percentage was 65%, unlike 90% in 7 h using silver-doped fibers. The increased degradation of oxytetracycline is attributed to the success in decreasing the banned band of SiO2–TiO2 fibers from 3.1eV to 2.5eV to silver doping.
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