水热合成WO3薄膜乙醇传感器及其检测装置

摘要

以钨酸钠和硫酸氢钠为原料,采用水热热合成方法制备了纳米WO3,采用陶瓷管为基底构建了WO3薄膜传感器,测试了WO3薄膜传感器在不同工作温度下对乙醇的气敏性能.结果表明:WO3薄膜传感器在250 ℃时获得最佳响应,具有良好的乙醇气体敏感特性.开展相关硬件电路设计以及程序编写,采用ST M32微处理器和LabVIEW技术制作了乙醇气体检测装置.该装置具有稳定可靠、操作简便、实用性强的优点.%By taking sodium tungstate and sodium bisulfate as raw materials,nano WO3is prepared by the hydrothermal synthesis method.The WO3thin film sensor is constructed with the ceramic tube as the base and the gas sensitivity of the WO3thin film sensor to ethanol at different working temperatures is tested.The results show that the WO3thin film sensor has the best response at 250 ℃ and has a good sensitivity to ethanol gas.The related hardware circuit design and programming are carried out,and the STM32 microprocessor and LabVIEW technology are used to make the ethanol gas detection device.This device has the advantages of stability,reliability,easy operation and strong practicality.