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Hydrothermal functionalization of graphene quantum dots extracted from cellulose

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dc.citedby1
dc.contributor.authorRabeya R.en_US
dc.contributor.authorMahalingam S.en_US
dc.contributor.authorLau K.S.en_US
dc.contributor.authorManap A.en_US
dc.contributor.authorSatgunam M.en_US
dc.contributor.authorChia C.H.en_US
dc.contributor.authorAkhtaruzzaman M.en_US
dc.contributor.authorid57207761973en_US
dc.contributor.authorid55434075500en_US
dc.contributor.authorid57196329217en_US
dc.contributor.authorid57200642155en_US
dc.contributor.authorid48561725600en_US
dc.contributor.authorid57215089308en_US
dc.contributor.authorid57195441001en_US
dc.date.accessioned2023-05-29T09:37:28Z
dc.date.available2023-05-29T09:37:28Z
dc.date.issued2022
dc.descriptionCellulose; Deionized water; Dye-sensitized solar cells; Graphene; High resolution transmission electron microscopy; Honeycomb structures; Hydrothermal synthesis; Ionic liquids; Semiconductor quantum dots; Solar power generation; X ray photoelectron spectroscopy; Functionalizations; Functionalized; Functionalized graphene; Hydrothermal; NFS-graphene quantum dot; Optimisations; Photovoltaic applications; Physical and chemical properties; Strongest acid; Synthesis route; Nanocrystals; Cellulose; Chemical Properties; Elements; Esca; Honeycomb Structures; Liquids; Synthesis; Transmission Electron Microscopy; X Ray Spectroscopyen_US
dc.description.abstractFunctionalization is a promising approach to modify the physical and chemical properties of graphene quantum dots (GQDs). However, the synthesis of functionalized GQDs (F-GQDs) is usually conducted with strong acids. Thus, the sustainable synthesis route of F-GQDs remains a challenge. This is important for suitable optimization of GQDs to be applied in sustainable photovoltaic applications, especially dye-sensitized solar cells owing to the strong attachment of functional group elements. This study presents a detailed study of optical, structural, and chemical changes that occurred in GQDs during the functionalization process by adding an ionic liquid, 1-ethyl-1-methylpyrrolidium bis(trifluoromethylsulfonyl)imide via hydrothermal synthesis approach using an eco-friendly route comprising only cellulose and deionized (DI) water. The presence of ionic liquid provides fundamental elements (nitrogen (N), fluorine (F), and sulfur (S)), which are added to GQDs producing F-GQDs. The optimum result shows that the 20 wt% N, F, S functionalized GQDs have the largest UV�vis absorption and photoluminescence emission. The F-GQDs also revealed a single crystalline hexagonal graphene-like honeycomb structure in transmission electron microscopy and increased roughness relatively from atomic force microscopy. Moreover, the Fourier transform infrared and x-ray photoelectron spectroscopy have also confirmed the presence of C-N, C=S, C-F, and N-H functional groups in the F-GQDs produced. � 2022 Elsevier B.V.en_US
dc.description.natureFinalen_US
dc.identifier.ArtNo139520
dc.identifier.doi10.1016/j.cplett.2022.139520
dc.identifier.scopus2-s2.0-85126003878
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85126003878&doi=10.1016%2fj.cplett.2022.139520&partnerID=40&md5=a7fe90f5a22311efcec283254cd05d47
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/26877
dc.identifier.volume795
dc.publisherElsevier B.V.en_US
dc.sourceScopus
dc.sourcetitleChemical Physics Letters
dc.titleHydrothermal functionalization of graphene quantum dots extracted from celluloseen_US
dc.typeArticleen_US
dspace.entity.typePublication
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