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Synthesis of Graphene Oxide Sulfonated and Estimation of its Catalytic Activity in Conversion Reaction of Fructose to 5-Hydroxymethylfurfural

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Synthesis of Graphene Oxide Sulfonated and Estimation of its Catalytic Activity in Conversion Reaction of Fructose to 5-Hydroxymethylfurfural Graphene oxide (GO) was synthesized by Hummer method and sulfonated by (NH4)2SO4 solution. The obtained material was characterized by different methods such as XRD, IR, TEM, EDS. The XRD pattern showed the successful exfoliation of graphite with shift of diffraction maximum from 2θ=26,5o to 10,4o. . | VNU Journal of Science: Natural Sciences and Technology, Vol. 32, No. 4 (2016) 137-142 Synthesis of Graphene Oxide Sulfonated and Estimation of its Catalytic Activity in Conversion Reaction of Fructose to 5-Hydroxymethylfurfural Ho Thi Hai1, Chu Ngoc Chau1, Nguyen Thi Ngoc Quynh2, Phan Thanh Hai1, Le Quang Tuan3, Nguyen Thanh Binh1,* 1 2 Faculty of Chemistry, University of Science Department of Physical Chemistry, Industrial University of Viet Tri 3 Military Institute of Sciences and Technologies Received 08 July 2016 Revised 19 August 2016; Accepted 01 Septeber 2016 Abstract: Graphene oxide (GO) was synthesized by Hummer method and sulfonated by (NH4)2SO4 solution. The obtained material was characterized by different methods such as XRD, IR, TEM, EDS. The XRD pattern showed the successful exfoliation of graphite with shift of diffraction maximum from 2θ=26,5o to 10,4o. The TEM images released the existence of graphene oxide sheet in various sizes. The sulfo group formation (–SO3H) on graphene oxide surface was confirmed by IR spectra with the appearance of characteristic picks at 1401 cm-1 và 1124 cm-1 attributed to vibrations of groups S-O and S=O. Catalytic activity of GO-SO3H was estimated by reaction of fructose conversion into 5-hydroxymethylfufural (HMF). The different reaction parameters (temperature, time, solvent), were examined. It results that highest yield reaction attained 56% at 120oC, for 2h of reaction time and in solvent dimethyl sulfoxide (DMSO). Keywords: 5-hydroxymetylfurfural, graphene oxide, fructose. 1. Introduction* from biomass, such as vegetable oils and lignocelluloses [1]. Between the two sources, fuel from lignocelluloses has more attention due its abundant lignocelluloses source and non-competitive with agricultural land. To synthesize biofuel from this source, one of the interesting ways passes an important intermediate compound, that is 5hydroxymethylfurfural (HMF). HMF is synthesized from glucose or fructose through triple .

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