Zhao Run, Zong Shirong, Ma Qingfu, Xu Zhenling, Yuan Jiahong
Yunnan Academy of Ecological and Environmental Sciences, Kunming City, 650034, Yunnan province, China.
Yunnan Key Laboratory for Pollution Processes and Control of Plateau Lake-Watersheds, Kunming City, Yunnan, 650034, China.
Sci Rep. 2025 Feb 21;15(1):6306. doi: 10.1038/s41598-024-75153-2.
A composite membrane based on zinc oxide (ZnO) and polyacrylonitrile (PAN) is proposed to enhance the dye removal efficiency of materials in wastewater treatment. Firstly, this study introduces the structure and properties of zinc oxide, which serve as the basis for fabricating the ZnO-PAN composite membrane. Secondly, ZnO powder is prepared via hydrothermal reaction and furnace cooling. Moreover, spinning solutions with different mass fractions are prepared by dissolving PAN powder in N, N-dimethylformamide, and PAN nanofiber films are obtained through heating and stirring. Subsequently, the composite membrane's electrochemical performance, electrocatalytic performance, and dye removal capability are thoroughly investigated through experiments to validate its potential for improving water purification. The study reveals significant findings: (1) The electrocatalytic properties of M-10 membranes vary at different voltages. Notably, at 30 V, the membrane achieves the highest removal rate, reaching 99%. (2) In the electrocatalytic stability test, the initial organic contents of Congo Red (CR), Rhodamine B (Rh B), Yellow Sunset (YS), Methyl Orange (MO), and Methylene Blue (MB) dye solutions are 28.53 mg/L, 14.89 mg/L, 9.62 mg/L, 11.47 mg/L, and 13.16 mg/L, respectively. After 10 h of electrocatalysis, the organic content in the filtrate of different dye solutions is reduced by 90%. (3) Within 1 h after a 5-minute electro-cleaning process, the composite membrane exhibits a remarkable recovery rate of 85% for permeate flux. These research findings demonstrate the excellent performance of the ZnO-PAN composite membrane in enhancing water purification, with the removal rate of various dyes by the composite membrane reaching up to 90%. (4) The composite membrane demonstrated excellent mechanical stability throughout the electrocatalytic process. The membrane modification substantially decreased concentration polarization, leading to a 16% reduction in the fouling rate during long-term use and significantly enhancing its anti-fouling capability. Consequently, this membrane presents strong potential for industrial wastewater treatment applications, offering a noteworthy advancement in dye removal efficiency. This study significantly advances dye removal efficiency and highlights the substantial potential of ZnO-PAN composite membranes in water treatment technology. These findings are expected to drive further advancements in wastewater treatment technology.
提出了一种基于氧化锌（ZnO）和聚丙烯腈（PAN）的复合膜，以提高材料在废水处理中的染料去除效率。首先，本研究介绍了氧化锌的结构和性能，这为制备ZnO-PAN复合膜奠定了基础。其次，通过水热反应和炉冷制备ZnO粉末。此外，将PAN粉末溶解在N，N-二甲基甲酰胺中制备不同质量分数的纺丝溶液，并通过加热和搅拌获得PAN纳米纤维膜。随后，通过实验对复合膜的电化学性能、电催化性能和染料去除能力进行了深入研究，以验证其改善水净化的潜力。研究得出了重要发现：（1）M-10膜在不同电压下的电催化性能有所不同。值得注意的是，在30V时，该膜的去除率最高，达到99%。（2）在电催化稳定性测试中，刚果红（CR）、罗丹明B（Rh B）、日落黄（YS）、甲基橙（MO）和亚甲基蓝（MB）染料溶液的初始有机物含量分别为28.53mg/L、14.89mg/L、9.62mg/L、11.47mg/L和13.16mg/L。电催化10小时后，不同染料溶液滤液中的有机物含量降低了90%。（3）在5分钟的电清洗过程后的1小时内，复合膜的渗透通量恢复率高达85%。这些研究结果表明，ZnO-PAN复合膜在提高水净化方面具有优异的性能，复合膜对各种染料的去除率高达90%。（4）复合膜在整个电催化过程中表现出优异的机械稳定性。膜改性大大降低了浓差极化，使长期使用过程中的污染率降低了16%，并显著提高了其抗污染能力。因此，这种膜在工业废水处理应用中具有很大的潜力，在染料去除效率方面有显著进展。本研究显著提高了染料去除效率，并突出了ZnO-PAN复合膜在水处理技术中的巨大潜力。这些发现有望推动废水处理技术的进一步发展。
