Specific CH4 Gas Sensor Based on Tungsten Carbide /SnO2 Core-Shell Modified Interdigitated Electrode

In this study, a specific CH4 sensor is fabricated based on interdigitated electrode that modified with core-shell of tungsten carbide/tin oxide (WC/SnO2) nanoparticles by wetchemical method. The morphology of wet chemical-synthesized WC/SnO2 core-shell was evaluated by different methods such aspatterned X-ray diffraction (XRD), and particle size analyzer (PSA). The fabricated sensor is selected as specific nano material for CH4 detection. In the fabricated CH4 sensor, change in resistance of the sensor was considered as the detection system. In this study, figures of merits such aslinearity, specificity, response time were also evaluated. No serious interference was evaluated for different foreign gases, introduced to a certain concentration of CH4. The reliability of the fabricated CH4 sensor was evaluated via measuring CH4 in several gaseous samples. A fast response time about 22s has obtained from (5.0%WC-doped SnO2

کلیدواژه ها:

CH4 gas sensor ، SnO2 ، Core-shell ، Fast response time