Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 553, Issue -, Pages 131-138Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2018.02.029
Keywords
Emulsion separation; Superhydrophilic; GO/SiO2 nanocomposite membrane; Ultrahigh flux
Categories
Funding
- National Natural Science Foundation of China [11525415, 51420105003, 11327901, 61274114]
- National Key Research and Development Program of China [2016YFA0501602]
- National Science Foundation of Jiangsu Province [BK20160702]
- Scientific Research Starting Foundation for Returned Overseas Chinese Scholars
- Chinese Postdoctoral Science Foundation [2015M580375]
- Jiangsu Province Postdoctoral Science Foundation [205020500001]
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The development of filtration membranes with ultrahigh water flux for separation of oil-in-water emulsions by low energy consumption approach is currently an urgent demand. A novel nanocomposite membrane with superhydrophilic and underwater superoleophobic properties has been successfully prepared by one-step vacuum filtration of an aqueous graphene/SiO2 dispersion on a microfiltration substrate. Owing to the addition of SiO2 nanoparticles, the interlayer space of graphene oxide (GO) layers is expanded, enabling this composite membrane to separate a variety of oil-in-water emulsions with ultrahigh water flux (> 4550 Lm(-2) h(-1) bar(-1)), a 2-order-of-magnitude improvement as compared to pure GO membrane, and also superior compared to most commercialized membranes. The proposed convenient, time-saving (< 10 min) and low cost strategy endows possibility of massive production and shed light on commercial applications of water treatment of oil-in-water wastes in industry and daily life.
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