论文部分内容阅读
本研究基于两个催化敏感材料,建立了一种鉴别不同醚蒸气的新方法.分别让四种醚蒸气经过纳米MgO(或ZrO2)表面进行催化发光(Cataluminescence,CTL)反应(称其为一级反应),产生CTL响应信号I1.再让反应后的尾气作为新的反应物经过纳米MgO(或ZrO2)表面进行CTL反应(称其为二级反应),产生新的CTL响应信号I2.实验发现:在波长425 nm、流速220 mL/min、温度240℃的检测条件下,四种醚蒸气分别依次经过MgO-MgO和ZrO2-MgO材料时产生的一、二级CTL信号比值I1/I2是常数,不随浓度变化而变化,可以鉴别和区分不同的醚蒸气.通过改变分析气体流经ZrO2-MgO的方向,可以得到每种醚蒸气的四组CTL强度比值I1/I2,据此可获得多维信息来增强传感器鉴别醚蒸气的能力.该传感器具有稳定性好、造价低和鉴别能力强的优点.
In this study, we established a new method for the identification of different ether vapors based on two catalysis-sensitive materials, respectively, by allowing four ether vapors to pass through the surface of nanometer MgO (or ZrO2) for Catalysis (CTL) Reaction) to generate a CTL response signal I1, and let the tail gas as a new reactant through the nano-MgO (or ZrO2) surface CTL reaction (called the second reaction), resulting in a new CTL response signal I2. : The ratio of primary and secondary CTL signals I1 / I2 generated when four kinds of ether vapors pass through MgO-MgO and ZrO2-MgO materials respectively at a wavelength of 425 nm, a flow rate of 220 mL / min and a temperature of 240 ° C are constant , Does not change with the concentration changes, you can identify and distinguish between the different ether vapor.By changing the direction of the analysis of gas flowing through the ZrO2-MgO, you can get each ether vapor four CTL intensity ratio I1 / I2, which can be multi-dimensional information To enhance the ability of the sensor to identify ether vapor.The sensor has the advantages of good stability, low cost and identification ability.