文献类型：期刊文献

英文题名：Ultrahigh water permeation with a high multivalent metal ion rejection rate through graphene oxide membranes

作者：Dai, Fangfang[1];Zhou, Feng[2];Chen, Junlang[1];Liang, Shanshan[3];Chen, Liang[1];Fang, Haiping[3]

机构：[1]Zhejiang A&F Univ, Coll Environm & Resource Sci, Dept Opt Engn, Zhejiang Prov Key Lab Carbon Cycling Forest Ecosy, Hangzhou 311300, Peoples R China;[2]Minist Environm Protect, State Environm Protect Key Lab Radiat Monitoring, Radiat Monitoring Tech Ctr, Key Lab Radiat Monitoring Zhejiang Prov, Hangzhou 310012, Peoples R China;[3]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2021

卷号：9

期号：17

起止页码：10672

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20212010347479);WOS:【SCI-EXPANDED(收录号:WOS:000643885600001)】；

基金：This work was supported by the National Natural Science Foundation of China (12074341, 12004110, U1832150, 11875236, and 11974366), the Fundamental Research Funds for the Central Universities and the Scienti.c Research and Developed Fund of Zhejiang A&F University (no. 2017FR032). The authors thank Prof. Guosheng Shi, Prof. Gongping Liu, and Dr Wangxi Fang for constructive suggestions.

语种：英文

外文关键词：Nanofiltration membranes - Wastewater treatment - Metals - Nanofiltration - Graphene - Microfiltration - Permeation - Water filtration

摘要：Graphene oxide (GO) membranes show exceptional molecular permeation properties and have gained tremendous attention in the area of wastewater treatment. However, they still suffer from some limitations, such as low water permeance when the ion rejection rate is at a satisfactory level and unstable performance. Here, we developed a class of GO membranes from GO suspensions using vacuum filtration without drying treatment, which exhibit an ultrahigh water permeance of up to 75 +/- 2 L m(-2) h(-1) bar(-1) while still maintaining a high rejection rate of 99.9 +/- 0.1% for multivalent metal ions. Importantly, of all state-of-the-art nanofiltration membranes, this is the most permeable membrane with a satisfactory level of the rejection rate for multivalent ions. Furthermore, the GO membranes exhibit outstanding stability over long-term operation. Our work provides a simple way to fabricate GO membranes with outstanding water purification performance.