S-scheme heterojunction construction of Fe/BiOCl/BiVO4 for enhanced photocatalytic degradation of ciprofloxacin

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International Pub Date : 2024-04-01 DOI:10.1016/j.pnsc.2024.02.018

Guanlong Yu , Qifang Sun , Yi Yang , Si Chen , Yuannan Long , Yifu Li , Shiyong Ge , Dian Zheng

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Abstract

With the growing problem of water pollution caused by antibiotics, the development of photocatalysts with high photogenerated carrier separation efficiency is crucial. A high-efficiency microsphere Fe/BiOCl/BiVO₄ with S-scheme heterojunction was synthesized by solvothermal method and its ciprofloxacin (CIP) degradation performance were investigated under visible light. XRD, FT-IR, SEM, EDS, HRTEM and XPS results show that the photocatalytic have good crystallization, morphology and the formed a microsphere. The photocatalytic performance of Fe/BiOCl/BiVO₄ for CIP was superior to pure BiOCl and BiVO₄ due to the microsphere and formed heterostructure between BiOCl and BiVO₄. The influencing factors of CIP degradation by Fe/BiOCl/BiVO₄ were investigated, and the results showed that Fe/BiOCl/BiVO₄ had high degradation efficiency not only at pH 5–9, but also in the presence of inorganic Cl⁻, NO₃⁻ and metal ions. Under the optimal conditions, the degradation rate of CIP was up to 100% in 75 min. In addition to CIP, the Fe/BiOCl/BiVO₄ photocatalysts degraded other organic pollutants, such as tetracycline, oxytetracycline, chlortetracycline, ofloxacin, levofloxacin, and rhodamine B, by more than 92%. The main active species were photogenerated holes (h⁺) and superoxide radicals (·O₂⁻). In addition, possible intermediates and toxicity of intermediates were analyzed and five potential pathways for CIP degradation were proposed.

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用于增强环丙沙星光催化降解的 Fe/BiOCl/BiVO4 S 型异质结构造

随着抗生素造成的水污染问题日益严重，开发具有高光生载流子分离效率的光催化剂至关重要。本研究采用溶热法合成了具有 S 型异质结的高效微球 Fe/BiOCl/BiVO，并研究了其在可见光下降解环丙沙星（CIP）的性能。XRD、FT-IR、SEM、EDS、HRTEM 和 XPS 结果表明，该光催化物具有良好的结晶和形貌，并形成了微球。Fe/BiOCl/BiVO 对 CIP 的光催化性能优于纯 BiOCl 和 BiVO，这是因为 BiOCl 和 BiVO 之间形成了微球和异质结构。研究了Fe/BiOCl/BiVO降解CIP的影响因素，结果表明Fe/BiOCl/BiVO不仅在pH值为5-9时具有较高的降解效率，而且在有无机Cl、NO和金属离子存在时也具有较高的降解效率。在最佳条件下，75 分钟内 CIP 的降解率可达 100%。除 CIP 外，Fe/BiOCl/BiVO 光催化剂还降解了其他有机污染物，如四环素、土霉素、金霉素、氧氟沙星、左氧氟沙星和罗丹明 B，降解率超过 92%。主要的活性物质是光生空穴（h）和超氧自由基（-O）。此外，还分析了可能的中间产物和中间产物的毒性，并提出了五种潜在的 CIP 降解途径。

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来源期刊

Progress in Natural Science: Materials International 综合性期刊-综合性期刊

CiteScore

8.60

自引率

2.10%

发文量

2812

审稿时长

49 days

期刊介绍： Progress in Natural Science: Materials International provides scientists and engineers throughout the world with a central vehicle for the exchange and dissemination of basic theoretical studies and applied research of advanced materials. The emphasis is placed on original research, both analytical and experimental, which is of permanent interest to engineers and scientists, covering all aspects of new materials and technologies, such as, energy and environmental materials; advanced structural materials; advanced transportation materials, functional and electronic materials; nano-scale and amorphous materials; health and biological materials; materials modeling and simulation; materials characterization; and so on. The latest research achievements and innovative papers in basic theoretical studies and applied research of material science will be carefully selected and promptly reported. Thus, the aim of this Journal is to serve the global materials science and technology community with the latest research findings. As a service to readers, an international bibliography of recent publications in advanced materials is published bimonthly.