Significance of Porous Graphene for Gas Sensing and Charge Storage Applications

Abstract

In recent, the air pollution problem has become more serious issue due to pernicious effects on human health. One of the most harmful pollutants, carbon monoxide (CO) has been adsorbed on the graphene for gas-sensing applications. In order to overcome these challenges, the proposed work demonstrates the impact of different numbers of CO molecules adsorption for different widths of graphene. The analysis suggests that the tetralayer demonstrates ∼69.2% better strength in adsorption than monolayer graphene for multiple pollutants, and is also found to be suitable for band-gap-related applications. Moreover, graphene has been studied as an electrode material due to its high surface area and good conductivity. The higher conductivity of porous graphene results in higher charge storage capability due to more conducting channels that play a major role in calculating the parasitic values. For more conducting channels, it is observed that the percentage change in quantum resistance and inductance are reduced by 21.62% and 26.67%, respectively for 10 atoms w.r.t. 8 atoms wide porous graphene. The quantum capacitance is increased by 11.5% for 10 atoms w.r.t. 8 atoms wide porous graphene that results in improved charge storage capability of graphene.