稀土配合物催化发光气体传感器的研究

发布时间：2018-02-14 19:52

  本文关键词： 催化发光 气体传感器 稀土配合物 挥发性有机物　出处：《延安大学》2017年硕士论文　论文类型：学位论文

【摘要】：催化发光(Cataluminescence,CTL)技术近些年来发展迅速,尤其是在VOCs气体检测方面,依靠催化发光原理设计的气体传感器在环境安全、排放监察、医疗健康等方面发挥了巨大作用。与体积庞大、操作复杂的大型气体检测仪器相比,催化发光气体传感器具有操作简便、高效快速、易于小型化等优点,对实现气体实时在线监测上展现出明显的优势。对低温、经济、高效的催化发光敏感材料的研究和开发是近年来催化发光传感器的研究热点,多种类型的材料已被应用于此,其中稀土类材料表现出优异的发光性能。而同样拥有优秀发光性能的稀土配合物在催化发光领域的应用却未见报道,因此本文便选用了稀土配合物作为传感器的敏感材料,系统的研究了其催化发光行为并设计了四种类型的催化发光气体传感器。拓展敏感材料类型,为催化发光气体传感器的发展和应用提供新思路。主要内容包括:1.在研究过程中发现正丙醇在硼酸镝材料表面有强烈的发光现象,设计了以硼酸镝为传感材料检测正丙醇的传感器。该传感器在波长为535 nm、温度为150℃、载气流速为200 mL/min时,测定正丙醇质量浓度工作曲线的线性范围为40~1800 mg/m3(R=0.9955),检出限为15 mg/m3。选择了13种干扰气体进行选择性测试,除二氯化碳、乙醇、正丁醇分别有4%、9%、5%左右的干扰外,其他气体并无干扰。连续通入45个小时300 mg/m3的正丙醇,发光强度无明显变化,说明该传感器具有良好的使用寿命。2.研究了环氧氯丙烷在层状纳米材料硼酸钇上的催化发光响应情况,提出了检测空气中环氧氯丙烷的新方法。该方法具有较好的选择性和较低的工作温度,对低浓度的环氧氯丙烷响应十分迅速,仅需1秒左右便达到峰值。在最优实验条件下,该传感器的线性范围为10~800 mg/m3,检出限为2.9 mg/m3。回收率测试在101%~104%之间,说明该方法可用于环氧氯丙烷的实时监测。3.研究了VOCS在草酸铈上的化学发光行为,研究过程中发现丙酮通过草酸铈表面时有强烈的化学发光信号,据此设计了基于草酸铈催化发光法检测丙酮的气体传感器,相比于之前报道的丙酮的催化发光传感器,具有敏感材料经济简单、工作温度低的特点。考察了9种可能与丙酮共存的VOCs(可与丙酮互溶的醇类、脂类、酮类、烃以及卤代烃等)对该传感器的干扰情况,除了乙醚和丙醛干扰较大外,其余气体均无干扰。4.实验发现乙醚在柠檬酸铈表面会产生强烈的化学发光现象,在考察了温度、波长、流速对其发光信号的影响后设计了乙醚催化发光气体传感器。该传感器具有较低的工作温度,可用于实际样品的检测。
[Abstract]:In recent years, the catalytic luminescence technology has developed rapidly, especially in the field of VOCs gas detection. The gas sensors based on the principle of catalytic luminescence have played a great role in environmental safety, emission monitoring, medical health and so on. Compared with large gas detection instrument with complex operation, catalytic luminous gas sensor has the advantages of simple operation, high efficiency and fast speed, easy miniaturization and so on. In recent years, the research and development of highly efficient catalytic luminescent sensitive materials has been a hot topic in the field of catalytic luminescence sensors, and many kinds of materials have been applied in this field. Rare earth materials exhibit excellent luminescence properties, but the applications of rare earth complexes with excellent luminescence properties in the field of catalytic luminescence have not been reported. Therefore, rare earth complexes have been selected as sensitive materials for sensors in this paper. The catalytic luminescence behavior was systematically studied and four types of catalytic luminescence gas sensors were designed. It provides a new idea for the development and application of catalytic luminescent gas sensors. The main contents include: 1. In the research process, it was found that there is a strong luminescence phenomenon of n-propanol on the surface of dysprosium borate. A sensor for detecting n-propanol using dysprosium borate as the sensing material is designed. The sensor has a wavelength of 535 nm, a temperature of 150 鈩，

本文编号：1511478