渗透
膜
氧化物
石墨烯
水溶液中的金属离子
化学工程
离子
金属
材料科学
化学
纳米技术
生物化学
有机化学
渗透
工程类
作者
Junfan Liu,Shuai Wang,Rujie Yang,Lü Li,Shanshan Liang,Liang Chen
标识
DOI:10.1016/j.memsci.2022.120745
摘要
As increasing demand for wastewater treatment, membranes with excellent performance are still needed in recent years. Graphene-based membranes are promising candidates by virtue of their outstanding mechanical properties, chemically resistant and atomic thickness. In this work, a kind of membrane with nacre-like structure of the hydrothermal reduction graphene oxide (hrGO) cross-linked by amino acid were fabricated. The hrGO-amino acid membranes exhibited both high water permeance and high metal ions rejection. Typically, when treated FeCl 3 solutions, the hrGO membrane cross-linked by tryptophan (Trp) represented 191.0 L m −2 h −1 bar −1 water permeance which is 4.4-fold higher than that of pristine GO membrane, and is superior to other NF membranes while still maintained at 98.2% FeCl 3 rejection. Moreover, the hrGO-Trp membrane also exhibited a stable separation performance in a long time. Overall, our work reveals a facile method to realize ultrahigh water permeance of GO-based membranes for wastewater treatment. • The hrGO-Trp membrane was prepared based on cross-linking and hydrothermal reduction methods. • The water permeance of hrGO-Trp membrane has been enhanced significantly. • The hrGO-Trp membrane showed outstanding stability.
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