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Coffee-Ground-Derived Quantum Dots for Aqueous Processable Nanoporous Graphene Membranes
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. Sichuan University, China.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
2017 (English)In: ACS Sustainable Chemistry and Engineering, ISSN 2168-0485, Vol. 5, no 6, 5360-5367 p.Article in journal (Refereed) Published
Abstract [en]

Carbon-based quantum dots (QDs) with ultralow dimensions and controllable surface chemistry have unique properties appealing to diverse applications. Here, we disclose a high-throughput transformation of spent coffee grounds into uniform QDs assembled by few-layer graphene oxide nanosheets, employing a microwave-assisted strategy under aqueous reaction conditions. Given the low dimensions (30 nm) and high structural integrity, the highly oxygenated QDs exhibited excellent dispersibility in water with tunable fluorescence. The structural attributes of QDs conferred excellent affinity to graphene nanosheets, permitting aqueous processing of nanoporous graphene membranes applicable to removing a broad spectrum of water pollutants ranging from organic compounds to heavy metals while sustaining a high flux rate. The proposed "trash-to-treasure" strategy opens up new possibilities for aqueous processing of nanoporous graphene membranes with great potential in the environmental field. © 2017 American Chemical Society.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017. Vol. 5, no 6, 5360-5367 p.
Keyword [en]
Aqueous processing, Biobased nanodots, Graphene membrane, Nanopores, Water purification
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-209886DOI: 10.1021/acssuschemeng.7b00663ISI: 000402950000098Scopus ID: 2-s2.0-85020220851OAI: oai:DiVA.org:kth-209886DiVA: diva2:1115051
Funder
Swedish Research Council, 2014-4091
Note

QC 20170626

Available from: 2017-06-26 Created: 2017-06-26 Last updated: 2017-07-03Bibliographically approved

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