Fe-doped graphene nanosheet as an adsorption platform of harmful gas molecules (CO, CO2, SO2 and H2S), and the co-adsorption in O2 environments. Appl. Surf. Sci. 2018, 427, 227–236. 19. Zhang, C.P.; Li, B.; Shao, Z.G. First-principle investigation of CO and CO2 absorption on...
As the SnO2 works as a n-type semiconductor characteristic, when the SnO2 grain is exposed to the air, the O2 molecules in air will adsorbed on the surface of the SnO2 grain to form the adsorbed oxygen ions (O2−, O− or O2−). As the electrons on the surface of SnO2 are ...