State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
J Colloid Interface Sci. 2021 Apr;587:633-643. doi: 10.1016/j.jcis.2020.11.020. Epub 2020 Nov 9.
The development of recyclable photocatalysts with broad-spectral photoresponse has drawn much attention for the practical application in flowing wastewater treatment. Herein, we have reported the construction of BiOBr/Ag/AgBr junctions on carbon fiber cloth (CFC) as broad-spectral-response filter-membrane-shaped photocatalyst that is efficient and easily recyclable. With CFC as the substrate, BiOBr nanosheets (diameter: 0.5-1 μm) were firstly synthesized by a hydrothermal method, and then Ag/AgBr nanoparticles (size: 100-300 nm) were prepared on the surface of CFC/BiOBr by using a chemical bath deposition route. CFC/BiOBr/Ag/AgBr presents superior flexibility and wide UV-Vis-NIR photoabsorption (from 200 to 1000 nm). Under visible light irradiation, CFC/BiOBr/Ag/AgBr (area: 4 × 4 cm) can remove 99.8% rhodamine B (RhB), 99.0% acid orange 7 (AO7), and 93.0% tetracycline (TC) after 120 min, better than CFC/BiOBr (95.4% RhB, 55.0% AO7 and 91.2% TC). Interestingly, when CFC/BiOBr/Ag/AgBr is served as a filter-membrane in a photoreactor to purify the flowing sewage (RhB, rate: ~1.5 L h), the degradation rate of RhB goes up to 90.0% after ten filtering grades. Therefore, CFC/BiOBr/Ag/AgBr has great potential to purify the flowing wastewater as a novel filter-membrane-shaped photocatalyst.
具有宽光谱光响应的可回收光催化剂的开发引起了人们的广泛关注，因为它在流动废水处理中的实际应用具有很大的潜力。在此，我们报道了在碳纤维布（CFC）上构建 BiOBr/Ag/AgBr 结作为广谱响应过滤膜状光催化剂的方法，该催化剂高效且易于回收。以 CFC 为基底，首先通过水热法合成 BiOBr 纳米片（直径：0.5-1 μm），然后通过化学浴沉积法在 CFC/BiOBr 表面制备 Ag/AgBr 纳米颗粒（尺寸：100-300 nm）。CFC/BiOBr/Ag/AgBr 具有优异的柔韧性和宽的紫外-可见-近红外光吸收（200-1000nm）。在可见光照射下，CFC/BiOBr/Ag/AgBr（面积：4×4cm）可在 120min 内去除 99.8%的罗丹明 B（RhB）、99.0%的酸性橙 7（AO7）和 93.0%的四环素（TC），优于 CFC/BiOBr（95.4%RhB、55.0%AO7 和 91.2%TC）。有趣的是，当 CFC/BiOBr/Ag/AgBr 作为光反应器中的过滤膜用于净化流动污水（RhB，流速：~1.5 L h）时，经过 10 次过滤后，RhB 的降解率提高到 90.0%。因此，CFC/BiOBr/Ag/AgBr 作为一种新型过滤膜状光催化剂，具有净化流动废水的巨大潜力。
