Molecular Sieve Sensor for Pollutants Detection at Elevated Temperat

本项目的目的是通过分子筛在石英衬底上形成的沸石膜来开发在高温下选择性的NOx和SO2传感器。这些传感器可用于检测锅炉、炉膛、发动机等的废气。，并将这些信息反馈给燃烧系统。这样的控制有利于人类节约能源和保护环境。在石英衬底上形成ZSM-5薄膜。将基板置于热压釜中进行水热反应。我们考察了TEOS （Si源）和水浓度以及结构导向剂类型的影响。用该预算购买的产品进行了XRD和SEM表征。找到了制备定向薄膜和定制晶体尺寸的合成条件。在石英上制备了一种基于金铬电极的传感系统。构建了微机控制的传感器检测系统。通过燃烧去除有机结构导向剂后，进行Na与Cu离子交换。该传感器在100℃时对NOx敏感。此外，我们还研究了Y分子筛的合成条件，确定了Y分子筛单相合成的条件。在150℃时检测SO2。

The aim of this project is to develop NOx and SO2 sensors selective at elevated temperature by molecular sieving zeolite film formed on quartz substrates. These sensors are useful to detect the exhaust gas from boiler, furnace engine...ets., and the information can be feeded back to the combustion system. Such a control contributes the human being in view of energy saving and environmental protection.ZSM-5 film was formed on quartz substrate. The substrate was placed in an autoclave where hydrothermal reaction proceeded. We examined the influence of TEOS (Si source) and water concentrations, and the type of structure directing agents. The products were characterized by XRD and SEM which were purchased by this budget. The synthesis condition to obtain oriented film and tailored crystal size was found. A sensor system was fabricated on Au-Cr electrode on quartz. Sensor testing system controled by microcomputer was constructed. After removing the organic structure directing agent by burning, ion-exchange of Na with Cu was performed. This sensor was sensitive to NOx at 100ﾟC.In addiion, we studied the synthesis condition for Zeolite Y,and fould the condition to synthesize Y as sigle phase. SO2 was was detected at 150ﾟC.