نویسندگان
شیمی تجزیه، دانشکده شیمی، دانشگاه علم و صنعت ایران، تهران، تهران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
To monitor air quality and medical use, metal-oxide semiconductor are highly-sensitive and a good option for detecting small amounts of gases. In this paper, we study the analytical characteristics of the ethanol gas sensor made of ZnO nanotubes. For this purpose, ZnO nanotube were synthesized using a rapid electrochemical method in 40 minutes and used to make a sensor. The response of the gas sensor which based on the ratio of the electrical resistance of the sensor in the presence of gas samples to its electrical resistance in the air, was investigated. The sensor's analytical characteristics with a detection limit of 6.5 ppm and a good correlation coefficient of 0.9998 for the calibration curve, a relative standard deviation of 0.52 and a high recovery speed of 20 seconds, indicating that the sensor is sensitive, repeatable and have fast response.
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