Microwave-assisted quaternary nanocomposites containing NLM(NaLa (MoO4)2) semiconductors were combined with graphene-based polymers to activate gas sensing utilizing cyclic voltammetry. A cathode arranged for the scattering of graphene in NLM dependent on PPy conductive polymer is covered on a substrate with pre-assembled anodes, and concentrated to distinguish the location of CO2 and (CH3)2CO at room temperature (RT). Transmission electron microscopy, UV–visible spectroscopy, and Raman spectra affirm the closeness of few-layer graphene in the NLM-PPy polymeric nanocomposite and the current π–π collaboration between graphene and PPy. The NLM-graphene-PPy gas sensor demonstrates a high reaction and high selectivity for CO2 in a low focus scope of (25–1,000) ppm at RT. The acquired gas recognition exhibitions can be credited to the particular surface territory expanded by graphene, and to the improved collaboration between the film and the CO2 atoms through the π–electron arrangement. To examine the selectivity of the recognition of various gases dependent on graphene polymers, were made in (CH3)2CO, carbon dioxide (CO2) and air that explicitly express the perfect gas of compacted gas chambers in an unfilled vacuum chamber. The sensors offer direct electrical inspection. Finally, estimations have been presented that include various thicknesses of charge to represent the adsorption of CO2 and water molecules in graphene, and the alteration of the electronic structure of graphene achieved by the connection with the substrate and the particles.