(BiO)2CO3-Bi-TiO2复合纳米纤维制备及其光催化降解抗生素

doi:10.19894/j.issn.1000-0518.200203

摘要/Abstract

摘要： 以静电纺丝制备的TiO₂ 纳米纤维为基质,葡萄糖为还原剂,在不同的酸碱环境中,采用一步水热法可控合成了异质结型Bi-TiO₂、(BiO)₂CO₃-TiO₂和(BiO)₂CO₃-Bi-TiO₂复合纳米纤维光催化剂。通过X射线粉末衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、紫外-可见漫反射光谱(UV-Vis DRS)和光致发光光谱(PL)等对样品进行表征。以洛美沙星、环丙沙星和诺氟沙星为目标污染物,研究了TiO₂及其复合纳米纤维的光催化降解性能,并探究其降解反应机理。结果表明,(BiO)₂CO₃-Bi-TiO₂光催化活性最高,模拟太阳光照60 min,对诺氟沙星、洛美沙星和环丙沙星的降解率分别达到93.2％、97.5％和100％。

关键词: 复合纳米纤维, 等离子体共振效应, 抗生素, 光催化

Abstract: The heterojunction type Bi-TiO₂, (BiO)₂CO₃-TiO₂ and (BiO)₂CO₃-Bi-TiO₂ composite nanofibers were synthesized via a facile one-step solvothermal method, using electrospun TiO₂ nanofibers as the substrate and glucose as reducing agent,in acidic or alkaline environments. The obtained materials were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) and photoluminescence (PL) spectroscopy. The photocatalytic activities of the samples were evaluated by photodegradation of lomefloxacin, ciprofloxacin and norfloxacin as the target pollutants, under simulated sunlight irradiation, and the degradation reaction mechanism was explored. The results show that (BiO)₂CO₃-Bi-TiO₂ photocatalyst exhibits the highest photocatalytic activity, with the degradation rate of norfloxacin, lomefloxacin and ciprofloxacin of 93.2%, 97.5% and 100%, respectively, under simulated sunlight irradiation for 60 min.

Key words: Composite nanofibers, Plasma resonance effect, Antibiotic drugs, Photocatalysis

中图分类号:

O643

张春华, 赵晓波, 李跃军, 孙大伟. (BiO)₂CO₃-Bi-TiO₂复合纳米纤维制备及其光催化降解抗生素[J]. 应用化学, 2021, 38(1): 99-106.

ZHANG Chun-Hua, ZHAO Xiao-Bo, LI Yue-Jun, SUN Da-Wei. Preparation of (BiO)₂CO₃-Bi-TiO₂ Composite Nanofibers and Its Photocatalytic Degradation of Antibiotics[J]. Chinese Journal of Applied Chemistry, 2021, 38(1): 99-106.

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(BiO)₂CO₃-Bi-TiO₂复合纳米纤维制备及其光催化降解抗生素

Preparation of (BiO)₂CO₃-Bi-TiO₂ Composite Nanofibers and Its Photocatalytic Degradation of Antibiotics

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