High-performance Graphene Oxide Nanofiltration Membrane with Continuous Nanochannels...

 


Citation

 

Ruiyi Han, and Peiyi Wu*. High-Performance Graphene Oxide Nanofiltration Membrane with Continuous Nanochannels Prepared by in Situ Oxidation of Mxene. J. Mater. Chem. A 2019, 7, 6475-6481.


 

Abstract

 

Separation membrane with laminar structure assembled by two-dimensional materials has been widely explored to achieve precise molecular separation and high water permeability in the field of water purification. Herein, a novel GO-based nanofiltration membrane intercalated with TiO2 nanoparticles was fabricated by in situ oxidation of MXene nanosheets. The formation of TiO2 nanocrystals derived from the oxidation of MXene created additional channels for water permeation. Especially, the consecutively distributed TiO2 nanocrystals owning to the laminar structure as intercalators created continuous nanochannels within GO membrane for water transport, which shows great advantages over membrane prepared by traditional methods. The water flux of obtained membrane reached 89.6 L m-2 h-1 bar-1, which is 7.3 times higher than that of pristine GO membrane and 2.4 times that of GO/TiO2 membrane fabricated by traditional methods. The rejection rate for four different organic dyes are above 97%. The highly improved water flux with no obvious sacrifice of rejection rate was attributed to the continuous nanochannels derived from the in situ oxidation of MXene without destroying the intrinsic stacking structure of GO sheets. This study offers a novel strategy to fabricate continuous nanochannels within separation membrane with two-dimensional laminar structure.

上一篇
下一篇

友情链接

分享我们

浏览量