Highly efficient CuO/Cu@PC composite membranes for the photocatalytic degradation and sorption of roxithromycin from aqueous solutions

Results in Materials Pub Date : 2025-03-06 DOI:10.1016/j.rinma.2025.100677

Dinara T. Nurpeisova , Anastassiya A. Mashentseva , Fatima Abuova , Saida H. Aleskhanova , Murat Barsbay

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Abstract

This study presents an effective approach to synthesis, characterization, and application of composite polycarbonate (PC) track-etched membranes (TeMs) embedded with copper (Cu) and copper(II) oxide (CuO) microtubes (CuO/Cu@PC) for the efficient removal of the antibiotic roxithromycin (ROX) from aqueous solutions. Using an environmentally friendly glyoxylic acid-based deposition method, Cu microtubes were deposited onto the PC TeMs and subsequently thermally annealed to generate a catalytically active CuO phase. Comprehensive structural analyses (SEM, SEM-EDX, XRD, XPS, AFM) confirmed the successful transformation of Cu into CuO, enhancing the material's photocatalytic and sorptive performance. Under UV irradiation, the CuO/Cu@PC composites achieved a remarkable 96.8 % degradation of ROX within 180 min, significantly outperforming unannealed samples (85.9 %). Furthermore, adsorption studies demonstrated a maximum ROX uptake capacity of 410 mg/g at optimal pH 5.5, following a pseudo-second-order kinetic model and Freundlich isotherm, suggesting a heterogeneous chemisorption process. The composite membranes exhibited outstanding long-term stability, maintaining over 85 % photocatalytic efficiency after 10 cycles. These results highlight the potential of CuO/Cu@PC membranes as highly effective and reusable materials for the sustainable removal of pharmaceutical contaminants, offering a scalable solution for water purification.

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高效CuO/Cu@PC复合膜光催化降解和吸附罗红霉素水溶液

本研究提出了一种有效的方法来合成、表征和应用包埋铜（Cu）和氧化铜（CuO）微管（CuO/Cu@PC）的复合聚碳酸酯（PC）轨迹蚀刻膜（tem），以有效去除水溶液中的抗生素罗红霉素（roxithromycin， ROX）。采用环境友好的乙醛酸沉积方法，将Cu微管沉积在PC tem上，随后进行热退火以生成催化活性的CuO相。综合结构分析（SEM, SEM- edx， XRD， XPS， AFM）证实Cu成功转化为CuO，增强了材料的光催化和吸附性能。在紫外线照射下，CuO/Cu@PC复合材料在180分钟内对ROX的降解率达到了96.8%，明显优于未退火样品（85.9%）。此外，吸附研究表明，在最佳pH为5.5时，ROX的最大吸收率为410 mg/g，符合准二级动力学模型和Freundlich等温线，表明这是一个非均相的化学吸附过程。复合膜表现出优异的长期稳定性，在10次循环后保持85%以上的光催化效率。这些结果突出了CuO/Cu@PC膜作为高效可重复使用材料的潜力，可用于可持续去除药物污染物，为水净化提供了可扩展的解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Results in Materials

CiteScore

5.30

自引率

0.00%

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