Synthesis of graphene nanoplatelets using chemical vapour deposition and waste cooking oil as carbon feedstock

Abd Mudtalib, Nur Elina Shahrina Amza (2017) Synthesis of graphene nanoplatelets using chemical vapour deposition and waste cooking oil as carbon feedstock. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The aim of this study is to evaluate the potential in using waste cooking oil (WCO) as an alternative carbon feedstock to replace existing hazardous, Alcohol-based gases in synthesizing Graphene Nanoplatelets (GrNPs) Nanoplatelets (GNPs). 6 ml of WCO utilize in this experiment is extracted from cooking oil use for fried chicken, while as much as 0.2 grams Nickel Oxide (NiO) in powder form is use as catalyst. Both materials are mixed together in alumina crucible and stirred approximately for 15 minutes. Following by synthesizing process inside catalytic chemical vapour deposition (CVD) furnace; with temperature variables of 850 °C, 875 °C and 900 °C in growth time of 5 minutes. Based on Raman spectroscopy analysis, results from those three temperature show a significant 2D peak around 2670 to 2680 cm-1, which signified the presence of Graphene material. Whilst, peak of G-band show 50 to 700 cm-1 more higher intensity than 2D-band peak with an I2D/IG ratio less than 1, indicates that the GrNPs obtained are in multilayer form. It is verified by the surface morphological results of FESEM taken from two localized spots, where the sample appeared in different shapes, and distributed irregularly in stacking form. At magnification of 200k, spot 1 demonstrate rectangular shape at certain part of its layers while spot 2 show broken piece of rectangular layers. Thermogravimetic analysis show the acceptance of the GrNPs towards heat, where the sample was heated up from 25 °C to 900°C with heat flowrate of 20 °C per minutes. During the 45 minutes of heating, the weight of GrNPs decrease 22% from initial weight. Deduce that the amount of oxidizes oxygen/moisture residues in the GrNPs content is acceptable. The technique to fabricate multilayer GrNPs from WCO is viable and scalable for potential thermal critical applications. All of this analysis confirming the potential of using WCO as a carbon source for Graphene Nanoplatelets (GrNPs) growth.

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