Investigation of Metal-Oxide/Reduced Graphene-Oxide Nanocomposites for Gas Sensor Applications

Abstract

Recently, graphene-based nanocomposites were reported by several researchers in various fields such as gas sensors, lithium-ion batteries, and photodetectors. The gas sensor is useful in detecting the harmful chemicals and toxic gases for the protection of human health and the environment. A recent, some researchers have reported that the gas sensors made of GO or rGO with the addition of metal oxide enhance the sensing properties of the sensor. In this context, attempts are made in reviewing various gas sensors based on graphene and its derivatives based metal-oxide nanocomposite exhibiting different sensing properties for different gases like NO2, NH3, H2, LPG gas. Different synthesis methods and the results obtained from different characterization techniques for various gases were also discussed. Characterization techniques such as SEM, TEM, XRD, FTIR, UV, and CV were depicted.