Enhanced Photocatalytic Degradation of Ciprofloxacin from Pharmaceutical Wastewater Using Microwave-Synthesized Lanthanum/MXene Nanocomposites

IF 3.7 3区化学 Q2 CHEMISTRY, APPLIED

Topics in Catalysis Pub Date : 2025-10-10 DOI:10.1007/s11244-025-02214-9

Upasana Bagri, Saima Jan, Ajit Sharma, Prabal Pratap Singh

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Abstract

The rampant misuse of pharmaceuticals, including ciprofloxacin, has severely harmed ecosystems. Although oxidative degradation of ciprofloxacin shows promise, it often requires substantial energy consumption. Therefore, developing an eco-friendly and efficient degradation method is crucial. This study investigates the degradation of ciprofloxacin using MXene (Ti₃C₂) synthesized via conventional and microwave-assisted (MW) methods. To enhance photocatalytic activity, La/MXene nanocomposites were synthesized using the MW method with three different ratios (1:1, 1:2, and 2:1). Characterization techniques, including FTIR, XRD, SEM, and EDX analysis, confirmed the development of MXene and La/MXene nanocomposites. SEM images revealed lanthanum nanoparticles attached to the surface of MXene layers. The effects of pH, time, and hydrogen peroxide concentration on ciprofloxacin removal were examined. Photocatalytic investigations showed that La/MXene nanocomposites significantly outperformed pure MXene in ciprofloxacin removal. Notably, the La/MXene nanocomposite (1:2) achieved a remarkable removal efficiency of 97.83% within 120 min. Adding 0.05% H₂O₂ further enhanced degradation to 99.05%. The La/MXene nanocomposite demonstrated good recyclability and stability.

Graphical Abstract

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微波合成镧/MXene纳米复合材料光催化降解制药废水中的环丙沙星

包括环丙沙星在内的药物滥用严重损害了生态系统。虽然环丙沙星的氧化降解有希望，但它通常需要大量的能量消耗。因此，开发一种环保高效的降解方法至关重要。研究了MXene （Ti3C2）对环丙沙星的降解作用，研究了MXene （Ti3C2）对环丙沙星的降解作用。为了提高La/MXene纳米复合材料的光催化活性，采用MW法合成了三种不同比例的La/MXene纳米复合材料（1:1,1:2和2:1）。表征技术，包括FTIR， XRD， SEM和EDX分析，证实了MXene和La/MXene纳米复合材料的发展。SEM图像显示镧纳米粒子附着在MXene层的表面。考察了pH、时间、过氧化氢浓度对环丙沙星去除率的影响。光催化研究表明，La/MXene纳米复合材料对环丙沙星的去除效果明显优于纯MXene。值得注意的是，La/MXene纳米复合材料（1:2）在120 min内的去除率达到了97.83%。添加0.05%的H2O2进一步将降解率提高到99.05%。La/MXene纳米复合材料具有良好的可回收性和稳定性。图形抽象

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来源期刊

Topics in Catalysis 化学-物理化学

CiteScore

5.70

自引率

5.60%

发文量

197

审稿时长

2 months

期刊介绍： Topics in Catalysis publishes topical collections in all fields of catalysis which are composed only of invited articles from leading authors. The journal documents today’s emerging and critical trends in all branches of catalysis. Each themed issue is organized by renowned Guest Editors in collaboration with the Editors-in-Chief. Proposals for new topics are welcome and should be submitted directly to the Editors-in-Chief. The publication of individual uninvited original research articles can be sent to our sister journal Catalysis Letters. This journal aims for rapid publication of high-impact original research articles in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.