A Practical Hydrogenated Graphene Gas Sensor for CO2 Monitoring

The development of a practical gas sensor is of great interest for monitoring toxic and non-toxic gases that might endanger our safety and wellbeing in different settings. Here, we present a gas sensor based on hydrogenated graphene for monitoring carbon dioxide (CO2). Hydrogenated graphene was synthesized using a single-step method directly onto an insulating substrate plated with gold. The material was characterized using Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The interaction of the hydrogenated graphene with CO2 was systematically studied at different parts per million (PPM) to determine the detection limits of the sensor. Our results show that the hydrogenated graphene-based sensor is capable of sensing CO2 at mid-PPM levels with a CO2 responsivity of -176.21. The biosensor was also found to detect CO2 at low ppm values, making it suitable for use as a biosensor for aerobic cellular respiration and regular CO2 emission sensing. We have successfully developed a versatile and practical gas sensor based on hydrogenated graphene for CO2 monitoring. The sensor's detection limits, and responsivity make it suitable for a wide range of applications, including monitoring of CO2 emissions and aerobic cellular respiration. The simplicity of the synthesis method used also makes it a promising candidate for large-scale production.