Preparation and Characterization of Reduced Graphene Oxide Derived from Waste Biomass
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Abstract
This research studied the synthesis of reduced graphene oxide from biomass left over from agriculture, including macadamia shell scraps and hemp scraps. By transforming the biomass into graphite material through the carbonization process, graphene oxide was then synthesized from the prepared graphite powder. Graphene oxide was synthesized by using the modify Hummer method and the the synthesized reduced graphene oxide was carried out by reduction reaction of the graphene oxide with L-ascorbic acid in alkaline conditions (using sodium hydroxide solution), respectively. The results of this study found that the graphite prepared from macadamia nut shell fragments at a temperature of 800 0C for 3 hours, and graphite prepared from hemp scraps that were carbonized at a temperature of 600 0C for 1 hour, has the percentage of carbon element was 80.93% and 82.30%, respectively. The morphology was examined using a scanning electron microscope found that micron-level pores were distributed within the structure of the prepared graphite. Reduced graphene oxide is prepared by reducing graphene oxide with L-ascorbic acid solution at the pH 9.5±0.5 has carbon content more than 93 percent. From electrical properties investigateion, it was found that the prepared reduced graphene oxide has low resistance and good electrical conductivity. Therefore, reduced graphene oxide prepared from macadamia nut shells and hemp scraps has the potential to be further studies for future applications in supercapacitor development.
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