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|Title:||High yield synthesis of graphene quantum dots from biomass waste as a highly selective probe for Fe3+ sensing||Authors:||Abbas, Aumber
Tabish, Tanveer A.
Bull, Steve J.
Lim, Tuti Mariana
Phan, Anh N.
|Keywords:||Engineering::Materials||Issue Date:||2020||Source:||Abbas, A., Tabish, T. A., Bull, S. J., Lim, T. M., & Phan, A. N. (2020). High yield synthesis of graphene quantum dots from biomass waste as a highly selective probe for Fe3+ sensing. Scientific Reports, 10(1), 21262-. doi:10.1038/s41598-020-78070-2||Journal:||Scientific Reports||Abstract:||Graphene quantum dots (GQDs), a novel type of zero-dimensional fluorescent materials, have gained considerable attention owing to their unique optical properties, size and quantum confinement. However, their high cost and low yield remain open challenges for practical applications. In this work, a low cost, green and renewable biomass resource is utilised for the high yield synthesis of GQDs via microwave treatment. The synthesis approach involves oxidative cutting of short range ordered carbon derived from pyrolysis of biomass waste. The GQDs are successfully synthesised with a high yield of over 84%, the highest value reported to date for biomass derived GQDs. As prepared GQDs are highly hydrophilic and exhibit unique excitation independent photoluminescence emission, attributed to their single-emission fluorescence centre. As prepared GQDs are further modified by simple hydrothermal treatment and exhibit pronounced optical properties with a high quantum yield of 0.23. These modified GQDs are used for the highly selective and sensitive sensing of ferric ions (Fe3+). A sensitive sensor is prepared for the selective detection of Fe3+ ions with a detection limit of as low as 2.5 × 10–6 M. The utilisation of renewable resource along with facile microwave treatment paves the way to sustainable, high yield and cost-effective synthesis of GQDs for practical applications.||URI:||https://hdl.handle.net/10356/146036||ISSN:||2045-2322||DOI:||10.1038/s41598-020-78070-2||Rights:||© 2020 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||CEE Journal Articles|
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