A Study on Electrical and Gas Sensing Properties of rGO ZnO rGO SnO2 Nanocomposites

Abstract

In recent years, there have been various developments have taken place in rGO/Metal oxide for different applications. Several studies have been performed to improve the gas sensitivities of various reduced graphene oxide and their composites workable at higher temperature. rGO has more importance than other carbon compounds because of its different inimitable properties, viz., low cost, easiness of processing, better stability, the lightweight, successful combination of physical and chemical properties, better optical and electrical properties, etc. single MO semiconducting has good electrical conductivity and gas sensing ability because of its low density and larger surface area. There are many improvements taking place to rGO/MO composites, this leads to the development of high-performance electrical and gas sensing materials. The hybrid materials of rGO/MO nanocomposites show good electrical properties with lower dielectric losses, enhanced sensitivity, selectivity, and stability compared to the individual compounds. These nanocomposites have received greater attention in the past decades because of their exciting possibilities from structural modifications and promising applications in many fields. In the present research work, a simple and cost-effective method was adopted to synthesize the pure rGO/MO composites by keeping the above facts in view. rGO/MO composites were prepared by wet chemical mixing method. The prepared samples were characterized by thermo gravimetric analysis, X-ray diffractometer, Fourier transform infrared spectrometer, Field emission scanning electron microscope, energy dispersive X-ray analysis, and UV-Visible spectrophotometer. The dielectric and AC conductivity of the prepared samples were studied at room temperature in the frequency range of 100 to 5MHz. The prepared samples were subjected to acetone, ethanol, and butane gas sensing studies using in-house fabricated gas sensing chamber at room temperature. Increase number of gas leakages misfortunes are the major motivational...