基于COOH/SBA-15的谐振式氨气传感器气敏性能研究  

High performance QCM ammonia sensor based on COOH/SBA-15

作　　者：徐甲强[1] 曹研思 王炉煜 程知萱[1] 向群 Xu Jiaqiang;Cao Yansi;Wang Luyu;Cheng Zhixuan;Xiang Qun(College of Science,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学理学院,上海200444

出　　处：《河南师范大学学报（自然科学版）》2018年第3期46-53,共8页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金(61371021)

摘　　要：针对化工生产过程中易出现的氨气泄露等问题,采用共聚法合成了羧基功能化介孔硅材料(COOH/SBA-15),并将其作为敏感材料设计了一种石英晶体微天平(Quartz Crystal Microbalance,QCM)式氨气传感器.利用扫描电子显微镜、透射电子显微镜、X射线衍射仪、全自动比表面积和孔隙度分析仪、傅里叶变换红外光谱仪等对敏感材料的形貌和结构进行了表征,并系统地研究了基于COOH/SBA-15的QCM传感器的气敏性能.测试结果表明该传感器对氨气(NH3)的检测限可达到10-6(体积分数),所合成的COOH/SBA-15-2样品对体积分数为20×10-6的NH3响应恢复时间分别为5s和7s.同时,该传感器对NH3具有较高的化学选择性和稳定性,具有较高的实用价值.Novel quartz crystal microbalance(QCM)based ammonia sensors were designed to prevent the leakage of ammonia in the chemical industry.The carboxyl-functionalized mesoporous silicas(COOH/SBA-15)synthesized by co-condensation methods were employed as the sensitive materials.Subsequently,the morphology and structure of the sensitive materials were characterized by means of scanning electron microscopy,transmission electron microscopy,X-ray diffraction,automatic surface area and porosity analysis and fourier transform infrared spectroscopy.The QCM sensor based on COOH/SBA-15-2 showed that the limit of detection to ammonia(volume fraction)could reach 10-6 level.The response and recovery time to 20×10-6 ammonia was 5 s and 7 s,respectively.The results showed that the ammonia sensor was sensitive and stable accompanying with high practical value.

关 键 词：石英晶体微天平 SBA-15 羧基功能化 氨气传感器 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]