铜掺杂氧化锌纳米纤维宽线性响应乙醇气体传感器

采用电纺丝技术结合高温煅烧制备了铜掺杂氧化锌复合纳米纤维,并通过XRD,XPS,SEM和TEM等手段对材料进行表征.将所得材料作为敏感层构筑了气体传感器,器件对乙醇蒸气具有很好的传感特性,特别是当Cu/Zn摩尔比为1∶60时,由于Cu组分的活化作用,所得传感器不仅具有高灵敏度、快速响应恢复(2 s/7 s)特性及优良的稳定性,而且在5~104μg/g超大乙醇蒸气浓度范围内都能保持良好的线性关系(R2=0.99),这不仅有利于乙醇实际检测,而且对宽响应范围及高灵敏传感器的发展具有重要意义.

Cu Doped ZnO Electrospun Nanofibers for Ethanol Detector with Broad Linear Response

Saturation phenomena of sensing signal often appear when target molecular was still at a low concentration, which threatens the gas detection.Herein, Cu doped ZnO composite nanofibers were prepared via electrospinning combined with subsequent calcination, and then were characterized by XRD, XPS, SEM, TEM, and so on.The sensors based on Cu doped ZnO composite nanofibers exhibited excellent sensing performance towards ethanol vapor, when the molar ratio of Cu to Zn was 1∶60. Activated by the Cu dopant, the composite nanofibers presented high responsivity, long-term stability, rapid response and recovery(2 s/7 s).Notably, the linear range of the sensor for detecting ethanol was 5-104 μg/g, which was much wider than former reports and would be helpful for gas detecting in practical applications.