With coal-based carbon as a hard template and zinc acetate as zinc source,a kind of ZnO nanomaterial with excellent crystal structure and pore properties was synthesized by adopting high-temperature roasting process.Then,the sensitivity of a gas sensor based on this ZnO nanomaterial to ethanol gas was investigated.The results are shown as follows:such ZnO sensor at 200℃presents higher sensitivity to lowly-concentrated ethanol gas,with a response value of 5.25;the response time and recovery time of the ZnO sensor to the ethanol gas with concentration of 1×10-5are 10 s and 6 s respectively;the ZnO sensor has its sensitivity to ethanol gas in a linear relationship with the concentration of ethanol gas,and can detect the lowest concentration level of 1×10-7;the ZnO sensor has a lower sensitivity to those kinds of gas,including acetic acid,methanol,ammonia and methane.Due to its higher sensitivity to ethanol gas,it is concluded that such sensor presents excellent selectivity in gas detection.
关键词
气体传感器/气敏材料/煤基炭/硬模板法/氧化锌/乙醇/气敏性能
Key words
gas sensor/gas-sensing material/coal-based carbon/hard templating/zinc oxide/ethanol/gas sensitivity
维普
万方数据