We used here a computational technique using DFT to simulate the adsorption of some small molecules specifically CO, CO2 and H2O gas molecules on the surface of pristine graphene as well as Al-doped graphene and investigated their effect on the electronic properties of the these surfaces.
To the best of our knowledge, there are no simultaneous theoretical studies towards adsorption of CO, CO2 and H2O gas molecules on the surface of Al-doped graphene. We selected the Al atom since AlG has been attracted a great deal of attentions [20]. In order to comparing and understanding the insightfulness relationship between chemical structure of AlG–CO, AlG–CO2 and AlG–H2O and their electronic properties, we examined the geometrical as well as quantum chemical studies of PG and AlG before and after interaction with CO, CO2 and H2O gas molecules.