The College of Education for Pure Sciences discussed a master’s thesis entitled “A computational study of the use of graphene as a gas sensor” by Aseel Uday Asaad. The study showed a clear change in the electronic properties such as the structures of the beams and the density of states and in certain cases the energy gap, which in turn affects the electrical conductivity. This means that doped graphene can be used to manufacture field-effect transistors (FET) and use them as gas sensors. The study recommended continuing to study the effect of adding other element molecules to the surface of pure graphene and comparing the results with previous studies in order to reach the highest adsorption energies and more suitable for devices based on graphene, and conducting a practical study on sensors made of graphene and tainted graphene to observe the practical benefit of these sensors.