高通量抗污染氧化石墨烯膜研究进展

Research progress of high flux and antifouling graphene oxide membranes

水资源短缺与水污染是21世纪人类面临的共同挑战之一。膜技术具有低能耗和低成本等优点,是一种绿色高效的水处理技术。氧化石墨烯具有分子级的厚度和优异的化学稳定性,是一种优异的二维膜材料,在水处理膜领域具有重要应用前景。综述了氧化石墨烯膜在水处理领域的研究进展,针对膜技术面临的通量低和膜污染的挑战,以氧化石墨烯膜通道和表面构建中的介尺度问题为重点,探讨了不同尺度插层材料对氧化石墨烯膜通道结构与分离性能的影响,并分析了氧化石墨烯膜抗污染表面构建策略及对不同尺度污染物的抗污染机制。最后,对高通量抗污染氧化石墨烯膜研究进行了总结和展望。

Water scarcity and pollution are one of most grand challenges facing humanity in the 21st century.Due to the low energy consumption and low cost,membrane technology is a green and efficient water treatment technology.Graphene oxide(GO)nanosheets with atomic thickness and excellent chemical stability have been recognized as an excellent two-dimensional(2D)membrane material,holding great promise in developing membranes for sustainable water treatment.In this paper,the development of GO membranes for water treatment is reviewed.Aiming to overcome two major challenges,low permeation flux and membrane fouling,of the membrane technology for water treatment,the mesoscale issues during the construction of nanochannels and surfaces of GO membranes are emphasized.In detail,the influence of the intercalator with different scales on the nanochannel structure and separation performance of the GO membranes is discussed.The antifouling strategies of GO membranes against foulants with different scales is analyzed.Finally,the brief summary and tentative perspectives of high permeation and antifouling graphene oxide membranes are presented.