Mohamad Aliff, Ali Rahman and Lee, Soon Poh and Chong, Kwok Feng and Teo, Ellie Yi Lih (2023) Facile preparation and characterisation of oxygen-rich reduced graphene oxide for improved electrochemical performance : A preliminary study. Malaysian Journal of Chemistry, 25 (5). pp. 13-22. ISSN 1511-2292. (Published)
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Abstract
Graphene is an excellent candidate as an electrode material for supercapacitors due to its exceptional properties. Among the many synthesis routes, reduced graphene oxide (rGO) synthesised through modified Hummers’ method followed by reduction has been the preferred route to obtain graphene due to its flexibility. Depending on the reaction condition, the degree of oxidation present on rGO will differ and affect its overall charge storage capability. But, the use of toxic reagents or harsh conditions will introduce environmental concerns. Herein, an environmental-friendly KCl was introduced to modify the degree of oxidation on rGO using a simple aggregation method. In this study, graphite oxide obtained through modified Hummers’ method was modifiedwith KCl followed by reduction using ammonia to produce chemically-modified rGO (S-rGO).S-rGO obtained was then characterised using UV-Vis and FT-IR while its electrochemical behaviourwas studied with cyclic voltammetry. The UV-Vis and FT-IR analyses showed that the oxidationlevel of S-rGO increased linearly with the mass of KCl used. Specific capacitance calculated from the CV curves revealed that a 3.5 times enhancement was observed. The results revealed the possible modification on S-rGO using environmental-friendly KCl and its potential use as an electrode material for supercapacitors application.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Aggregation; Electrode; Oxygen; Reduced graphene oxide; Surface modification |
| Subjects: | H Social Sciences > HD Industries. Land use. Labor Q Science > Q Science (General) T Technology > T Technology (General) |
| Faculty/Division: | Faculty of Industrial Sciences And Technology Institute of Postgraduate Studies |
| Depositing User: | Mr Muhamad Firdaus Janih@Jaini |
| Date Deposited: | 07 Jan 2025 04:36 |
| Last Modified: | 07 Jan 2025 04:36 |
| URI: | http://umpir.ump.edu.my/id/eprint/42804 |
| Download Statistic: | View Download Statistics |
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