Process Intensification Laboratory, Department of Chemical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, 769008, India.
Process Intensification Laboratory, Department of Chemical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, 769008, India.
Environ Pollut. 2023 Sep 15;333:122057. doi: 10.1016/j.envpol.2023.122057. Epub 2023 Jun 30.
The facile preparation of visible-light-driven low-cost photocatalysts with extraordinary catalytic activity is highly beneficial in treating emerging pharmaceutical contaminants. Herein, oxalic acid-induced chemically functionalized graphitic carbon nitride (OCN) was prepared using a one-pot calcination method for the degradation of tetracycline. The estimated structural, morphological, and optical properties proved the formation of highly porous oxalic acid functionalized g-CN (OCN) with enhanced surface area and abundant amino groups. The photocatalytic degradation studies reported a maximum tetracycline removal of 92% within 90 min of visible light illumination and followed pseudo-first-order kinetics (k = 0.03068min). The phenomenal photocatalytic efficacy of the functionalized OCN is ascribed to the increased presence of amino groups, strengthening visible light absorption. The enriched surface area also generated many active sites for the reclamation of tetracycline. The radicals trapping studies show that holes and superoxides are mainly responsible for the redemption of tetracycline. The degradation pathways of the tetracycline using OCN were predicted using HRMS. This study provides more insights into the reclamation of tetracycline using a highly efficient metal-free photocatalyst.
可见光驱动的具有非凡催化活性的低成本光催化剂的简便制备在处理新兴药物污染物方面非常有益。本文采用一锅煅烧法制备了草酸诱导化学功能化石墨相氮化碳（OCN），用于四环素的降解。估计的结构、形态和光学性质证明了高度多孔的草酸功能化 g-CN（OCN）的形成，具有增强的比表面积和丰富的氨基。光催化降解研究表明，在可见光照射 90 分钟内，四环素的去除率最高可达 92%，并遵循拟一级动力学（k = 0.03068min）。功能化 OCN 的卓越光催化效果归因于氨基的增加，增强了可见光吸收。丰富的比表面积也为四环素的回收生成了许多活性位点。自由基捕获研究表明，空穴和超氧自由基是还原四环素的主要原因。使用高分辨质谱预测了 OCN 降解四环素的途径。这项研究为使用高效无金属光催化剂回收四环素提供了更深入的了解。
