Authors : Mustafa N. Oleiwi, Fouad A. Al-Saady and Abdulkareem M. Ali Al-Sammarraie
Abstract: Graphene a two dimensional nanomaterial with extremely high surface area and highly sensitive to surface molecules adsorbates, it can be modified effectively by different chemical treatment processes. In this research, graphite flakes were converted to graphene oxide using modified Hummers procedure and then the product has been reduced by hydrazine to graphenenanosheets, this Reduced Graphene Oxide (RGO) serves as starting materials for the next chemical treatments. The effect of chemical treatment of RGO with nitric acid, sulfuric acid, boric acid and sodium hydroxide separately were studied from view of doping degree and morphological changes using SEM, AFM, EDS and FTIR. Graphite staring material, RGO and all chemical treated RGO products were tested for NO2 gas sensing capability. RGO treated with nitric acid show the best sensitivity towards NO2 gas at 25°C while graphite sample has the worst sensitivity towards NO2 gas.
Mustafa N. Oleiwi, Fouad A. Al-Saady and Abdulkareem M. Ali Al-Sammarraie, 2018. The Effect of Chemical Treatment of Reduced Graphene Oxide on NO2 Gas Sensing. Journal of Engineering and Applied Sciences, 13: 7721-7728.