Hydrothermal functionalization of graphene quantum dots extracted from cellulose
Cellulose; 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; F...
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2023
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my.uniten.dspace-268772023-05-29T17:37:28Z Hydrothermal functionalization of graphene quantum dots extracted from cellulose Rabeya R. Mahalingam S. Lau K.S. Manap A. Satgunam M. Chia C.H. Akhtaruzzaman M. 57207761973 55434075500 57196329217 57200642155 48561725600 57215089308 57195441001 Cellulose; 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 Spectroscopy Functionalization 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. Final 2023-05-29T09:37:28Z 2023-05-29T09:37:28Z 2022 Article 10.1016/j.cplett.2022.139520 2-s2.0-85126003878 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126003878&doi=10.1016%2fj.cplett.2022.139520&partnerID=40&md5=a7fe90f5a22311efcec283254cd05d47 https://irepository.uniten.edu.my/handle/123456789/26877 795 139520 Elsevier B.V. Scopus |
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Cellulose; 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 Spectroscopy |
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57207761973 |
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57207761973 Rabeya R. Mahalingam S. Lau K.S. Manap A. Satgunam M. Chia C.H. Akhtaruzzaman M. |
| format |
Article |
| author |
Rabeya R. Mahalingam S. Lau K.S. Manap A. Satgunam M. Chia C.H. Akhtaruzzaman M. |
| spellingShingle |
Rabeya R. Mahalingam S. Lau K.S. Manap A. Satgunam M. Chia C.H. Akhtaruzzaman M. Hydrothermal functionalization of graphene quantum dots extracted from cellulose |
| author_sort |
Rabeya R. |
| title |
Hydrothermal functionalization of graphene quantum dots extracted from cellulose |
| title_short |
Hydrothermal functionalization of graphene quantum dots extracted from cellulose |
| title_full |
Hydrothermal functionalization of graphene quantum dots extracted from cellulose |
| title_fullStr |
Hydrothermal functionalization of graphene quantum dots extracted from cellulose |
| title_full_unstemmed |
Hydrothermal functionalization of graphene quantum dots extracted from cellulose |
| title_sort |
hydrothermal functionalization of graphene quantum dots extracted from cellulose |
| publisher |
Elsevier B.V. |
| publishDate |
2023 |
| _version_ |
1806427570296586240 |
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13.188404 |