Fabrication Condition-Dependent Photocatalytic Ciprofloxacin (CIP) Antibiotic Degradation of NaTiOx-Derived Brookite TiO2 Nanorods

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2024-09-13 DOI:10.1007/s10562-024-04813-9

Jingru Hu, Minjun Jiang, Bingwen Hu, Gang Cheng

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Abstract

Remediation of antibiotics by photocatalysis technique has been regarded as a promising route to tackle with the environmental pollution affecting human survival and development. In this work, brookite TiO₂ nanorods with different oxygen vacancy have been synthesized through tailoring the volume of ethylene glycol by hydrothermally treatment with NaTiOx-nanoassembly. After constitute and morphology confirmation with different characterizations, their photocatalytic performances are evaluated via ciprofloxacin (CIP) antibiotic degradation experiments. The result shows that the TiO₂-0 has the highest photocatalytic efficiency towards CIP degradation, comparing with TiO₂-15 and TiO₂-30 samples. Although the TiO₂-30 has high concentration oxygen vacancy, it exhibits excellent adsorption ability in the dark, rather than CIP degradation rate. The photo/electrochemical tests suggest the photo-generated electron lifetime, charge transfer ability, and the effective active sites on the material’s surface are inversely proportional to the concentration of oxygen vacancies. It also concludes that rational fabrication conditions tailoring of the photocatalyst could optimize the corresponding capability in the antibiotic degradation process. In addition, the possible degradation pathway is also proposed based on the high resolution mass spectrometry (HRMS), and the acute toxicity changes in the degradation process are also predicted.

Graphical Abstract

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制备条件依赖性光催化环丙沙星 (CIP) 抗生素降解的 NaTiOx 衍生 Brookite TiO2 纳米棒

利用光催化技术修复抗生素被认为是解决影响人类生存和发展的环境污染问题的一条有前途的途径。在这项工作中，通过对乙二醇进行水热处理，用 NaTiOx 纳米组装技术合成了具有不同氧空位的 Brookite TiO2 纳米棒。通过不同的表征对其构成和形貌进行确认后，通过环丙沙星（CIP）抗生素降解实验对其光催化性能进行了评估。结果表明，与 TiO2-15 和 TiO2-30 样品相比，TiO2-0 对 CIP 降解的光催化效率最高。虽然 TiO2-30 具有高浓度的氧空位，但它在黑暗条件下表现出优异的吸附能力，而不是 CIP 降解率。光/电化学测试表明，光生电子寿命、电荷转移能力和材料表面的有效活性位点与氧空位浓度成反比。研究还得出结论，合理的光催化剂制造条件可优化抗生素降解过程中的相应能力。此外，还根据高分辨质谱法（HRMS）提出了可能的降解途径，并预测了降解过程中的急性毒性变化。

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.