▎ 摘　　要

Improved Hummers technique employed for the synthesis of graphene oxide, the morphology, structure and composition characterized by (TEM) and (SEM). The device sensor fabricated by dispersing graphene oxide on an interdigitated Au-electrode for both gas and UV sensing. A graphene oxide gas sensor based on CO, H-2 and UV photodetector exhibited excellent responsivity, fast response and recovery time. The gas sensor sensitivities were around 17.12% and 22.83% for different gas (CO, H-2) concentrations at room temperature; as well the sensor resistance decreased in exposure to CO and H-2, revealing p-type semiconducting behaviour of the graphene oxide as excellent materials.