Hasham Firooz Masoumeh, Naderi Azra, Moradi Masoud, Kalantary Roshanak Rezaei
Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
Sci Rep. 2024 Feb 29;14(1):4954. doi: 10.1038/s41598-024-54549-0.
In this study, TiO nanoparticles were employed as a photocatalyst for the degradation of tetracycline (TC) under visible light irradiation. The TiO nanoparticles were decorated on natural pyrite (TiO/NP) and characterized using XRD, FTIR, and SEM-EDX methods. This study evaluated the impacts of various operational parameters such as pH, catalyst dosage, initial TC concentration, and light intensity on TC removal. The findings revealed that under optimal conditions (pH 7, catalyst: 2 g/L, TC: 30 mg/L, and light intensity: 60 mW/cm), 100% of TC and 84% of TOC were removed within 180 min. The kinetics of TC elimination followed a first-order model. The dominant oxidation species involved in the photocatalytic elimination of TC was found to be OH radicals in the TiO/NP system. The reuse experiments showed the high capability of the catalyst after four consecutive cycles. This study confirmed that the TiO/NP system has high performance in photocatalytic TC removal under optimized experimental conditions.
在本研究中，二氧化钛纳米颗粒被用作光催化剂，用于在可见光照射下降解四环素（TC）。二氧化钛纳米颗粒负载于天然黄铁矿上（TiO/NP），并采用X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和扫描电子显微镜-能谱分析（SEM-EDX）方法对其进行表征。本研究评估了各种操作参数，如pH值、催化剂用量、初始TC浓度和光照强度对TC去除的影响。研究结果表明，在最佳条件下（pH 7、催化剂：2 g/L、TC：30 mg/L和光照强度：60 mW/cm²），180分钟内可去除100%的TC和84%的总有机碳（TOC）。TC去除动力学遵循一级模型。发现TiO/NP体系中光催化去除TC所涉及的主要氧化物种是羟基自由基。重复使用实验表明，该催化剂在连续四个循环后仍具有较高的性能。本研究证实，在优化的实验条件下，TiO/NP体系在光催化去除TC方面具有高性能。
