Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7019758 | Journal of Membrane Science | 2018 | 35 Pages |
Abstract
Graphene oxide quantum dots (GOQDs), which inherit the monolayer of sp2 carbon atoms structure and hydrophilic groups as graphene oxide (GO) sheets, but with a quantum lateral size less than 100â¯nm, may hold great promise in membrane preparation. In this study, a novel nanocomposite membrane by mixing GOQDs with sodium alginate (SA) matrix was prepared for ethanol dehydration. GOQDs with an average lateral dimension around 3.9â¯nm provided additional shorter and less tortuous transport pathways for water molecules to penetrate the membrane compared to microsized GO sheets. Benefiting from the nanosize and high hydrophilicity of GOQDs, the nanocomposite membrane exhibited favorable ethanol dehydration performance with a total permeation flux of 2432â¯Â±â¯58â¯gâ¯mâ2 hâ1, which was 60% higher than that of pristine alginate membrane, and a separation factor of 1152â¯Â±â¯48. Incorporating GOQDs into the membranes can be an effective approach to improving the water permeation for water-permselective pervaporation membranes.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Manru Wang, Fusheng Pan, Leixin Yang, Yimeng Song, Hong Wu, Xuanxuan Cheng, Guanhua Liu, Hao Yang, Hongjian Wang, Zhongyi Jiang, Xingzhong Cao,