期刊
JOURNAL OF MEMBRANE SCIENCE
卷 618, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2020.118442
关键词
Graphene oxide; Ceramic membrane; Thin-film composite; Hollow fiber; Ultrafiltration
资金
- National Research Foundation of Korea (NRF) - Ministry of Science and ICT of South Korea [KS2022-20]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of South Korea [201820101066550, 20172010106170]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20172010106170] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [5199990414694] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A facile graphene oxide pre-coating method was used to prepare defect-free, ultrathin film composite ceramic hollow fiber membranes with outstanding separation performance. The membranes showed 2-8 times higher water flux compared to commercial multilayered ceramic ultrafiltration membranes, highlighting the potential of cost-effective GO interlayer pre-coating methods for various molecular separation applications.
In this study, we report a facile and straightforward graphene oxide pre-coating method to prepare defect-free, ultrathin film composite ceramic hollow fiber membranes. By coating a graphene oxide (GO) interlayer, the defect-free thin alumina active layer with sub-micrometer thicknesses was successfully coated on highly porous substrates without thick interlayers. The GO interlayer not only prevents the pore-clogging of the substrate by boehmite nanoparticles but also helps the thin and uniform formation of active layers. Since the ultrathin GO interlayer was naturally removed during the calcination process of the active layer over 400 degrees C, the ceramic thin-film composite (TFC) membranes with controllable active layer thickness and pore size were obtained. Prepared ceramic TFC membranes showed outstanding separation performance, which was 2-8 times higher water flux at the same MWCO, compared to commercial multilayered ceramic ultrafiltration membranes. The results demonstrate the superior separation properties of ceramic TFC membranes, and the potential of cost-effective GO interlayer pre-coating methods for fabricating inorganic based membranes for various molecular separation applications.
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