Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
J Colloid Interface Sci. 2025 Jan 15;678(Pt A):959-969. doi: 10.1016/j.jcis.2024.08.197. Epub 2024 Aug 24.
Bismuth oxybromide (BiOBr) nanomaterials are well-known efficient powder-shaped photocatalyst for degrading antibiotic wastewater, but their practical applications have been limited by unsatisfactory photo-absorption, weak photocatalytic activity and poor recyclability. To address these issues, we demonstrate that the growing of S-doped BiOBr nanosheets on carbon fiber cloth (CFC) can lead to efficient photocatalysis with recyclable features. With carbon fiber cloth as the substrate, S-doped BiOBr (BiOBr-S) nanosheets (diameter: ∼500 nm, thicknesses: ∼5-90 nm) was prepared by solvothermal method with thiourea as dopant. With the increase of thiourea (0-0.2 g) in the precursor solution, BiOBr-S nanosheets exhibit a significant shift in the photo-absorption edge from 420 to 461 nm and decreased thicknesses from 90 to 5 nm, accompanying by the increased proportion of (010) exposed surface. Amony them, CFC/BiOBr-S can degrade various contaminants (such as 98.7 % levofloxacin (LVFX), 95.6 % ciprofloxacin (CIP) and 95.9 % tetracycline (TC)) with most degradation efficiency within 120 min of visible light irradiation, which are 1.6, 1.9 and 1.4 times than that of CFC/BiOBr (61.4 % LVFX, 49.5 % CIP and 67.1 % TC), respectively. Significantly, when CFC/BiOBr-S photocatalytic fabric is combined with a multi-stage flow device to treat the flowing wastewater (10 mg/L LVFX, rate: 1 L/h), 91.0 % LVFX can be degraded after tenth grade. Therefore, this study not only demonstrates the controllable preparation of S-doped BiOBr nanosheets with different thickness on CFC but also highlights the practical applications of fabric-based photocatalysts for purifying the flowing sewage efficiently.
三溴化铋（BiOBr）纳米材料是一种众所周知的高效粉末状光催化剂，可用于降解抗生素废水，但由于光吸收不足、光催化活性弱和可回收性差，其实际应用受到限制。为了解决这些问题，我们证明了在碳纤维布（CFC）上生长掺硫 BiOBr 纳米片可以实现具有可回收性能的高效光催化。以碳纤维布为基底，通过硫脲掺杂的溶剂热法制备了掺硫 BiOBr（BiOBr-S）纳米片（直径：∼500nm，厚度：∼5-90nm）。随着前驱体溶液中硫脲（0-0.2g）的增加，BiOBr-S 纳米片的光吸收边缘从 420nm 显著移动到 461nm，厚度从 90nm 减小到 5nm，同时（010）暴露面的比例增加。在这些材料中，CFC/BiOBr-S 可以在可见光照射 120 分钟内降解各种污染物（如 98.7%左氧氟沙星（LVFX）、95.6%环丙沙星（CIP）和 95.9%四环素（TC）），其降解效率最高，分别是 CFC/BiOBr（61.4%LVFX、49.5%CIP 和 67.1%TC）的 1.6、1.9 和 1.4 倍。值得注意的是，当将 CFC/BiOBr-S 光催化织物与多级流动装置结合处理流动废水（10mg/L LVFX，流速：1L/h）时，经过十次处理后，91.0%的 LVFX 可以被降解。因此，本研究不仅展示了在 CFC 上制备不同厚度掺硫 BiOBr 纳米片的可控方法，还强调了基于织物的光催化剂在有效净化流动污水方面的实际应用。
