AI Article Synopsis
- Thin-film composite (TFC) membranes are prone to fouling and biofouling, which affects their performance.
- Researchers developed a thin-film nanocomposite (TFN) membrane by adding graphene oxide (GO)-silver-based metal-organic framework (Ag-MOF), resulting in enhanced anti-biofouling and antifouling traits.
- The new GO-Ag-MOF TFN membrane showed significantly improved water permeability and a higher ability to eliminate E. coli compared to other membrane types, demonstrating its superior effectiveness against fouling.
Article Abstract
Thin-film composite (TFC) membranes still suffer from fouling and biofouling. In this work, by incorporating a graphene oxide (GO)-silver-based metal-organic framework (Ag-MOF) into the TFC selective layer, we synthesized a thin-film nanocomposite (TFN) membrane that has notably improved anti-biofouling and antifouling properties. The TFN membrane has a more negative surface charge, higher hydrophilicity, and higher water permeability compared with the TFC membrane. Fluorescence imaging revealed that the GO-Ag-MOF TFN membrane kills Escherichia (E.) coli more than the Ag-MOF TFN, GO TFN, and pristine TFC membranes by 16, 30, and 92%, respectively. Forward osmosis experiments with E. coli and sodium alginate suspensions showed that the GO-Ag-MOF TFN membrane by far has the lowest water flux reduction among the four membranes, proving the exceptional anti-biofouling and antifouling properties of the GO-Ag-MOF TFN membrane.
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| http://dx.doi.org/10.1021/acsami.8b12714 | DOI Listing |
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