膜
氧化物
渗透
石墨烯
材料科学
化学工程
水溶液中的金属离子
纳米技术
离子
界面聚合
化学
单体
聚合物
有机化学
复合材料
渗透
生物化学
工程类
冶金
作者
Jìng Guo,Yanqiu Zhang,Fan Yang,Bhekie B. Mamba,Jun Ma,Lu Shao,Shaomin Liu
标识
DOI:10.1002/anie.202302931
摘要
Two-dimensional graphene oxide (GO) membranes are gaining popularity as a promising means to address global water scarcity. However, current GO membranes fail to sufficiently exclude angstrom-sized ions from solution. Herein, a de novo "posterior" interfacial polymerization (p-IP) strategy is reported to construct a tailor-made polyamide (PA) network in situ in an ultrathin GO membrane to strengthen size exclusion while imparting a positively charged membrane surface to repel metal ions. The electrostatic repulsion toward metal ions, coupled with the reinforced size exclusion, synergistically drives the high-efficiency metal ion separation through the synthesized positively charged GO framework (PC-GOF) membrane. This dual-mechanism-driven PC-GOF membrane exhibits superior metal ion rejection, anti-fouling ability, good operational stability, and ultra-high permeance (five times that of pristine GO membranes), enabling a sound step towards a sustainable water-energy-food nexus.
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