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Efficient separation of dyes using two-dimensional heterogeneous composite membranes.
- Source :
-
Water Research . Dec2023, Vol. 247, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- • The MOF and GO nanosheets were tightly stacked through the π-π effect. • The shortened transport path of the MOF/GO membrane improved the water permeability. • MOF/GO composite membrane can efficiently separate cationic and anionic dyes. Two-dimensional materials are widely used in membrane separation, but the loose distribution and severe expansion between graphene oxide (GO) nanosheets limit its application. Here, we introduce a two-dimensional MOF material into the GO membrane to enhance its water permeance and separation performance. The MOF/GO composite membrane was prepared by vacuum filtration. The MOF and GO nanosheets were tightly stacked through the π-π effect, and the shortened transmission path and enhanced pore structure greatly improved the water permeance of the composite membrane. The MOF/GO membrane exhibited a high water permeance of 56.94 L m−2 h−1 bar−1. The rejection rates of methylene blue and was as methyl orange dyes were as high as 99.79% and 99.11%, respectively. At increased dye concentration, the rejection rate of methylene blue was still maintained greater than 99%. Dye rejection after 18 h of continuous operation remains above 90%. This work provides new ideas for improving membrane separation materials. The combination of two-dimensional heterogeneous materials can result in synergistic advantages for the development of composite membranes with high water permeance and high rejection rate. [Display omitted] [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00431354
- Volume :
- 247
- Database :
- Academic Search Index
- Journal :
- Water Research
- Publication Type :
- Academic Journal
- Accession number :
- 173852363
- Full Text :
- https://doi.org/10.1016/j.watres.2023.120693