基于纳米ZnO-ZrO2催化发光丙酮传感器的研究

研究了丙酮在纳米ZnO-ZrO2(质量比为4:1)表面催化发光行为,发现基于这种纳米催化剂的气体传感器对丙酮的检测具有高灵敏度和较强的选择性。在波长460 nm,温度219℃,载气流速25 mL/min时进行定量分析,催化发光强度与丙酮浓度在一定范围内呈良好的线性关系,线性范围为0.1～4000 mL/m3(r=0.9996,n=6);检出限为1.6 mL/m3(S/N=3)。传感器工作时间可达106h以上,可用于丙酮的实时在线检测。

Study of an acetone sensor based on cataluminescence of ZnO-ZrO2 nanometerials

Cataluminescence of acetone on the surface of ZnO-ZrO2 hanomaterials with the mass ratio of 4∶1 was studied,and an acetone gas sensor based on this kind of CL was developed.The results showed that the sensor was of high sensitivity and selectivity to the determination of methanol gas.Quantitative analysis was performed at the wavelength of 460 nm,the surface temperature was 219 ℃,and the optimum flow rate of air carrier was around 25 mL/min.Under the optimized conditions,the linear range of cataluminescent(CTL) intensity versus concentration of methanol vapor was from 0.1 to 4000 mg/m3(r=0.9996,n=6),with a detection limit of 1.6 mg/m3(the signal-to-noise ratio was 3).The gas sensor could be working for more than 106 h and it was applied to the online determination of acetone.