George V Theodorakopoulos, Sergios K Papageorgiou, Fotios K Katsaros, George Em Romanos, Margarita Beazi-Katsioti
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引用次数: 0
摘要
这项综合研究利用一种先进的铜装饰中空纤维(HFs)光催化剂,探讨了甲基橙(MO)的吸附动力学及其光催化降解。为了提高吸附能力和光催化活性,该光催化剂在批量实验中进行了测试,以有效去除水溶液中的 MO。利用各种等温线模型,包括 Langmuir、Freundlich、Sips、Temkin 和 Dubinin-Radushkevich,以及动力学模型,如伪一阶、伪二阶、Elovich、Bangham 和 Weber-Morris,来评估不同初始浓度下的吸附能力和动力学。结果表明,在特定条件下,纳米复合光催化剂对 MO 具有良好的物理吸附作用。对紫外线照射下光催化降解的进一步分析表明,该材料在不同的 MO 浓度下都能保持较高的降解效率和稳定性。通过促进活性氧的生成,氧气在提高光催化性能方面发挥了关键作用,同时降解过程遵循 Langmuir-Hinshelwood 模型。该研究还证实了纳米复合光催化剂的稳健性和持续活性,它可以再生和重复使用,连续循环五次,在浓度高达 15 毫克/升时仍能保持 92% 的初始性能。总之,这种以 HF 为结构形式的高效纳米复合光催化剂有望通过吸附和光催化相结合的方式有效去除有机污染物,为废水处理和环境修复提供了宝贵的潜力。
Investigation of MO Adsorption Kinetics and Photocatalytic Degradation Utilizing Hollow Fibers of Cu-CuO/TiO2 Nanocomposite.
This comprehensive study explores the kinetics of adsorption and its photocatalytic degradation of methyl orange (MO) using an advanced copper-decorated photocatalyst in the form of hollow fibers (HFs). Designed to boost both adsorption capacity and photocatalytic activity, the photocatalyst was tested in batch experiments to efficiently remove MO from aqueous solutions. Various isotherm models, including Langmuir, Freundlich, Sips, Temkin, and Dubinin-Radushkevich, along with kinetic models like pseudo-first and pseudo-second order, Elovich, Bangham, and Weber-Morris, were utilized to assess adsorption capacity and kinetics at varying initial concentrations. The results indicated a favorable MO physisorption on the nanocomposite photocatalyst under specific conditions. Further analysis of photocatalytic degradation under UV exposure revealed that the material maintained high degradation efficiency and stability across different MO concentrations. Through the facilitation of reactive oxygen species generation, oxygen played a crucial role in enhancing photocatalytic performance, while the degradation process following the Langmuir-Hinshelwood model. The study also confirmed the robustness and sustained activity of the nanocomposite photocatalyst, which could be regenerated and reused over five successive cycles, maintaining 92% of their initial performance at concentrations up to 15 mg/L. Overall, this effective nanocomposite photocatalyst structured in the form of HF shows great promise for effectively removing organic pollutants through combined adsorption and photocatalysis, offering valuable potential in wastewater treatment and environmental remediation.
期刊介绍:
Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.