Han Zhenyang, Xiao Xiao, Qu Huaijiao, Hu Menglei, Au Christian, Nashalian Ardo, Xiao Xiao, Wang Yanxin, Yang Liu, Jia Fengchun, Wang Tianmei, Ye Zhi, Servati Peyman, Huang Linjun, Zhu Zhijun, Tang Jianguo, Chen Jun
Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, United States.
ACS Appl Mater Interfaces. 2022 Jan 12;14(1):1850-1860. doi: 10.1021/acsami.1c17201. Epub 2021 Dec 3.
Carbon nanomaterials have proven their wide applicability in molecular separation and water purification techniques. Here, an unzipped carbon nanotubes (CNT) embedded graphene oxide (GO) membrane (uCNTm) is reported. The multiwalled CNTs were longitudinally cut into multilayer graphene oxide nanoribbons by a modified Hummer method. To investigate the varying effects of different bandwidths of unzipped CNTs on their properties, four uCNTms were prepared by a vacuum-assisted filtration process. Unzipped-CNTs with different bandwidths were made by unzipping multiwalled CNTs with outer diameters of 0-10, 10-20, 20-30, and 30-50 nm and named uCNTm-1, uCNTm-2, uCNTm-3, and uCNTm-4, respectively. The uCNTms exhibited good stability in different pH solutions, and the water permeability of the composite membranes showed an increasing trend with the increase of the inserted uCNTm's bandwidth up to 107 L·m·h·bar, which was more than 10 times greater than that of pure GO membranes. The composite membranes showed decent dye screening performance with the rejection rate of methylene blue and rhodamine B both greater than 99%.
碳纳米材料已在分子分离和水净化技术中展现出广泛的适用性。在此，报道了一种嵌入氧化石墨烯（GO）膜的开拉链碳纳米管（CNT）（uCNTm）。通过改进的Hummer方法将多壁碳纳米管纵向切割成多层氧化石墨烯纳米带。为了研究不同带宽的开拉链碳纳米管对其性能的不同影响，通过真空辅助过滤工艺制备了四种uCNTm。通过将外径为0 - 10、10 - 20、20 - 30和30 - 50 nm的多壁碳纳米管开拉链制备了不同带宽的开拉链碳纳米管，并分别命名为uCNTm - 1、uCNTm - 2、uCNTm - 3和uCNTm - 4。uCNTm在不同pH值的溶液中表现出良好的稳定性，复合膜的水渗透率随着插入的uCNTm带宽增加呈现上升趋势，最高可达107 L·m·h·bar，比纯GO膜高出10倍以上。复合膜表现出良好的染料筛分性能，亚甲基蓝和罗丹明B的截留率均大于99%。
