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Water-floating nanohybrid films of layered titanate-graphene for sanitization of algae without secondary pollution

Title
Water-floating nanohybrid films of layered titanate-graphene for sanitization of algae without secondary pollution
Authors
Kim, In YoungLee, Jang MeeHwang, Eui-HoPei, Yi-RongJin, Woo-BinChoy, Jin-HoHwang, Seong-Ju
Ewha Authors
최진호황성주
SCOPUS Author ID
최진호scopus; 황성주scopus
Issue Date
2016
Journal Title
RSC ADVANCES
ISSN
2046-2069JCR Link
Citation
vol. 6, no. 100, pp. 98528 - 98535
Publisher
ROYAL SOC CHEMISTRY
Indexed
SCIE; SCOPUS WOS scopus
Abstract
A novel efficient and safe methodology to sanitize algae in natural water without secondary pollution is developed by fabricating floating graphene-inorganic hybrid films. Two kinds of floating freestanding hybrid films of layered titanate-graphene with efficient algae-killing functionality are fabricated by vacuum-assisted filtration of mixed colloidal suspensions of reduced graphene oxide (rG-O) nanosheets and exfoliated layered titanate nanosheets. Both the titanate nanosheets with lepidocrocite-and trititanate-type structures form homogeneous colloidal mixtures and hybrid freestanding films with rG-O nanosheets. The incorporation of a layered titanate nanosheet enhances the algae-killing activity of the graphene freestanding film, highlighting the beneficial role of photocatalytically-active titanate nanosheet. In comparison to the trititanate nanosheet, the lepidocrocite-type titanate nanosheet is more effective as a building block for enhancing the algae-killing activity of graphene film and for forming a novel nanoblade structure on the surface of the graphene film. The observed high sterilization functionality of the present layered titanate-graphene hybrid films is attributable to both the formation of the novel sharp nanoblade structure and the photocatalytic activity of layered titanate. The present result underscores that hybridization between graphene and photocatalytically-active inorganic nanosheets can provide a powerful way to explore pollution-free recoverable matrix efficient for removing harmful microorganisms in natural water.
DOI
10.1039/c6ra24140a
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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