期刊
DESALINATION
卷 426, 期 -, 页码 21-31出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.desal.2017.10.023
关键词
Biofouling; Graphene oxide membrane; Silver nanoparticle
资金
- Industrial Facilities and Infrastructure Research Program - Ministry of Land, Infrastructure and Transport of the Korean government [17IFIP-B087389-04]
- National Research Foundation of Korea - Korean government [NRF-2013R1A1A2066114]
Laminar graphene oxide (GO) membranes with excellent water permeability have demonstrated great potential in the field of membrane-based water purification. However, low ion rejection and controversy over their biofouling propensity are hurdles GO membranes face in realizing commercial applications. This study shows that silver nanoparticle (nAg)@polydopamine (pDA) deposition on chemically reduced GO (rGO) laminates can simultaneously enhance both biofouling resistance and ion rejection. In pressurized filtration tests, the salt rejection of nAg@pDA-rGO membranes outperformed that of GO membranes despite its lowered water permeability. In osmotic filtration tests, nAg@pDA-rGO membranes achieved an increased water flux of 28.9 LMH and reduced reverse solute flux of 0.21 mol/m(2).h, compared to GO membranes. Moreover, extremely low cell attachment and viability were seen on the nAg@pDA-rGO membrane, confirming the excellent antibiofouling ability of nAg-pDA-rGO membranes.
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