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Methane gas sensor was fabricated based on electrocatalytic properties of the Pd/MWNT nanocomposites on indium tin oxide (ITO)glass substrates.A linear response for methane was obtained in the range of 0-16%(v/v)with a detection limit of 0.167%(v/ v)and R.S.D.of 4.1%.After 100 times sensing or stable stored more than 12 months in atmosphere,unconspicuous measurable decrease was observed.The response time was less than 60s at room temperature and ambient pressure.Some common potential interferents in samples such as N_2,CO,CO_2,ethane,propane,pentane,methanol,ethanol,H_2 and NH_3 were investigated and all the effects were less than 5%on the response for 3.0%(v/v)methane.The sensor was applied to methane determinations in man-made gas samples,the results are satisfied.
Methane gas sensor was fabricated based on electrocatalytic properties of the Pd / MWNT nanocomposites on indium tin oxide (ITO) glass substrates. A linear response for methane was obtained in the range of 0-16% (v / v) with a detection limit of 0.167% (v / v) and RSDof 4.1%. After 100 times sensing or stable stored more than 12 months in atmosphere, unconspicuous measurable decrease was observed. The response time was less than 60 seconds at room temperature and ambient pressure. interferents in samples such as N_2, CO, CO_2, ethane, propane, pentane, methanol, ethanol, H_2 and NH_3 were investigated and all the effects were less than 5% on the response for 3.0% (v / v) was applied to methane determinations in man-made gas samples, the results are satisfied.