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Open AccessArticle

Gamma-Irradiation Induced Functionalization of Graphene Oxide with Organosilanes

1
Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
2
Materials Processing and Technology Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
3
Radiation Processing Technology Division, Malaysian Nuclear Agency, 43000 Bangi, Kajang, Malaysia
*
Authors to whom correspondence should be addressed.
Int. J. Mol. Sci. 2019, 20(8), 1910; https://doi.org/10.3390/ijms20081910
Received: 22 January 2019 / Revised: 13 March 2019 / Accepted: 19 March 2019 / Published: 18 April 2019
(This article belongs to the Special Issue Nano-Materials and Methods)
Gamma-ray radiation was used as a clean and easy method for turning the physicochemical properties of graphene oxide (GO) in this study. Silane functionalized-GO were synthesized by chemically grafting 3-aminopropyltriethoxysilane (APTES) and 3-glycidyloxypropyltrimethoxysilane (GPTES) onto GO surface using gamma-ray irradiation. This established non-contact process is used to create a reductive medium which is deemed simpler, purer and less harmful compared conventional chemical reduction. The resulting functionalized-GO were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA), and Raman spectroscopy. The chemical interaction of silane with the GO surface was confirmed by FT-IR. X-ray diffraction reveals the change in the crystalline phases was due to surface functionalization. Surface defects of the GO due to the introduction of silane mioties was revealed by Raman spectroscopy. Thermogravimetric analysis of the functionalized-GO exhibits a multiple peaks in the temperature range of 200–650 °C which corresponds to the degradation of chemically grafted silane on the GO surface. View Full-Text
Keywords: functionalization; silanes; graphene; gamma-ray functionalization; silanes; graphene; gamma-ray
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Aujara, K.M.; Chieng, B.W.; Ibrahim, N.A.; Zainuddin, N.; Thevy Ratnam, C. Gamma-Irradiation Induced Functionalization of Graphene Oxide with Organosilanes. Int. J. Mol. Sci. 2019, 20, 1910.

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