Characterization of Graphene Synthesized by Modified Hummers and Liquid-phase Exfoliation Method

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Published: Feb 22, 2019
Keywords:
Graphene Graphene oxide Graphene characterization Modified Hummer’s method Liquid-phase mechanical exfoliation

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Worawat Jansomboon
National Center of Excellence for Petroleum, Petrochemicals and Advance Material, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, Thailand
Palivut Brikshasri
National Center of Excellence for Petroleum, Petrochemicals and Advance Material, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, Thailand
Sangchai Sarawutanukul
National Center of Excellence for Petroleum, Petrochemicals and Advance Material, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, Thailand
Paweena Prapainainar
National Center of Excellence for Petroleum, Petrochemicals and Advance Material, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, Thailand Center for Advanced Studies in Nanotechnology and Its Applications in Chemical Food and Agricultural Industries, Kasetsart University, Bangkok, Thailand NANOTEC-KU-Center of Excellence on Nanoscale Materials Design for Green Nanotechnology, Kasetsart University, Bangkok, Thailand

Abstract

Graphene was synthesized through chemical cleavage followed by reduction process and through liquid-phase exfoliation methods. The characteristics of synthesized graphene were investigated by Raman spectroscopy, FTIR, SEM, XRD and UV-Visible spectrophotometry. It was found that Graphene Oxide (GO) synthesized by modified Hummer’s method had carboxylic acid, hydroxyl, and ether groups confirming that graphite was successfully oxidized. The result also showed that graphene oxide consisted of 12 layers and the layer distance was in the range of 0.67–0.72 nm. In liquid-phase exfoliation method, graphene sheets were synthesized by mixing graphite with naphthalene and N-methyl-2-pyrrolidone (NMP) followed by sonication. The results indicated that the inter layer spacing of graphite was expanded from 0.3356 to 0.3364 nm. The highest graphene concentration was up to 3.26 mg/mL and the yield was 54.34%.

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How to Cite
Jansomboon, W., Brikshasri, P., Sarawutanukul, S., & Prapainainar, P. (2019). Characterization of Graphene Synthesized by Modified Hummers and Liquid-phase Exfoliation Method. Applied Science and Engineering Progress, 12(1), 14–19. Retrieved from https://ph02.tci-thaijo.org/index.php/ijast/article/view/187149
Issue
Vol. 12 No. 1 (2019)
Section
Research Articles

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