Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China; College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
J Colloid Interface Sci. 2020 Sep 1;575:183-193. doi: 10.1016/j.jcis.2020.04.077. Epub 2020 Apr 25.
Numerous nanosized photocatalysts have been demonstrated to treat antibiotic solutions efficiently in beakers, but plenty of antibiotics have been discharged to the flowing rivers. For photocatalytically degrading the flowing antibiotic wastewater, the prerequisite is to develop flexible large-scale filter-membrane with high photocatalytic activity. To solve this issue, with carbon fiber (CF) cloth as a flexible porous substrate, herein we have reported the in-situ growth of BiOBr/AgPO heterostructures. BiOBr nanosheets (thickness: ~10 nm, diameter: 0.5-1 μm) and AgPO particles (size: 50-200 nm) are synthesized on CF cloth successively via a solvothermal-chemical deposition two-step strategy. CF/BiOBr/AgPO cloth displays excellent visible photoabsorption (edge: ~520 nm). Under visible-light illumination, CF/BiOBr/AgPO cloth (4 × 4 cm) could degrade ~90.0% tetracycline hydrochloride (TCH) as a model of antibiotics in 30 min in a beaker. Especially, CF/BiOBr/AgPO cloth can be used as the filter-membrane to construct multiple photocatalytic-setup for degrading the flowing antibiotic wastewater. The removal efficiency of TCH goes up from 12.8% at the first grade to 89.6% at the sixth grade. Furthermore, the photocatalytic mechanism of CF/BiOBr/AgPO cloth and the possible decomposition pathway of TCH have been proposed based on simulation and experiment results. Therefore, the present work provides some insight for developing flexible filter-membrane-shaped photocatalysts for degrading the flowing wastewater.
已经有许多纳米级光催化剂被证明可以有效地在烧杯中处理抗生素溶液，但仍有大量抗生素被排放到流动的河流中。为了光催化降解流动的抗生素废水，前提是要开发具有高光催化活性的柔性大规模过滤膜。为了解决这个问题，以碳纤维（CF）布为柔性多孔基底，本文报道了 BiOBr/AgPO 异质结构的原位生长。通过溶剂热-化学沉积两步法，在 CF 布上成功合成了 BiOBr 纳米片（厚度：10nm，直径：0.5-1μm）和 AgPO 颗粒（尺寸：50-200nm）。CF/BiOBr/AgPO 布表现出优异的可见光吸收（边缘：520nm）。在可见光照射下，CF/BiOBr/AgPO 布（4×4cm）在烧杯中 30 分钟内可降解~90.0%盐酸四环素（TCH）作为抗生素的模型。特别地，CF/BiOBr/AgPO 布可用作过滤膜，构建多个光催化装置，用于降解流动的抗生素废水。TCH 的去除效率从第一级的 12.8%上升到第六级的 89.6%。此外，根据模拟和实验结果，提出了 CF/BiOBr/AgPO 布的光催化机制和 TCH 的可能分解途径。因此，本工作为开发用于降解流动废水的柔性过滤膜形状的光催化剂提供了一些见解。
