School of Environmental and Safety Engineering, Changzhou University, Changzhou, 213164, PR China.
Changzhou Cheff Environmental Protection Technology Co., Ltd, Changzhou, 213164, China.
Chemosphere. 2022 Nov;307(Pt 2):135811. doi: 10.1016/j.chemosphere.2022.135811. Epub 2022 Aug 2.
In this study, a variety of boron nitride (BN) modified BiVO (BN-BiVO) composites with visible-light response were prepared and used to degrade tetracyclines (TCs), including tetracycline (TC) and oxytetracycline (OTC). When treating the TCs solution under visible light irradiation, 4BN-BiVO displayed high photocatalytic performance (87.1% for TC and 86.2% for OTC), which were 3.6 and 2.3 times than that of BiVO, respectively. Photoluminescence spectroscopy (PL) and transient photocurrent proved that the combination of BN and BiVO effectively promotes the efficient separation of photogenerated electrons and holes in the material, resulting in enhanced photocatalytic activity. Further, radical trapping experiments in combination with electron spin resonance (ESR) revealed that ·OH radicals and holes were the predominant reactive species. Ultimately, the possible photocatalytic mechanism for TCs degradation was proposed on the basis of the experiments and characterization analysis. This study offers a new promising approach for the design of photocatalysts with visible-light response for efficient TCs elimination.
在这项研究中，制备了具有可见光响应的各种氮化硼（BN）修饰的 BiVO（BN-BiVO）复合材料，并用于降解四环素（TCs），包括四环素（TC）和土霉素（OTC）。在可见光照射下处理 TCs 溶液时，4BN-BiVO 表现出高的光催化性能（TC 为 87.1%，OTC 为 86.2%），分别是 BiVO 的 3.6 和 2.3 倍。光致发光光谱（PL）和瞬态光电流证明，BN 和 BiVO 的结合有效地促进了材料中光生电子和空穴的有效分离，从而提高了光催化活性。此外，自由基捕获实验结合电子自旋共振（ESR）表明·OH 自由基和空穴是主要的反应性物质。最终，根据实验和特征分析提出了 TCs 降解的可能光催化机理。这项研究为设计具有可见光响应的高效 TCs 消除光催化剂提供了一种新的有前途的方法。
