▎ 摘　　要

Carbon monoxide (CO) is one of the highly toxic gases which is extremely harmful to people when it crosses OSHA (Occupational Safety and Health Administration) PEL (Permeable exposure level). Therefore, search for new material which is highly sensitive and selective to carbon monoxide is a continuous process. In the present investigation, the cost-effective carbon monoxide sensor was developed on the interdigitated copper electrode based on PPy-GO composite materials. The PPy-GO composite was synthesized successfully using the in situ polymerization process. X-ray diffraction, Raman spectroscopy, FTIR spectroscopy, UV-Vis spectroscopy, and atomic force microscope were utilized to characterize the PPy-GO composite and to confirm the high interaction between GO sheets and PPy chains. The sensitivity of the sensor for various concentrations of carbon monoxide (CO) gas was investigated at room temperature. The sensor demonstrated quick response and recovery time to CO with excellent repeatability. Moreover, the sensor also exhibited long-term stability and better selectivity to carbon monoxide. Further, in the current study, the material properties and sensing mechanisms have been studied in detail. The findings of the study showed that PPy-GO composite is a promising material and a sensor device developed using interdigitated copper electrode on copper clad is a cost-effective approach for detection of CO. [GRAPHICS]