金属有机骨架材料ZIF-8(I_2)的湿敏性能  

Humidity sensing properties of metal-organic framework materials of ZIF-8(I_2)

作　　者：程鑫[1] 张莹[1] 王广平[2] 张宇鹏[1] 陆斌武 阮圣平[1] 刘彩霞[1] 

机构地区：[1]吉林大学电子科学与工程学院,长春130012 [2]吉视传媒股份有限公司,长春130021 [3]无锡海达安全玻璃有限公司,江苏无锡214000

出　　处：《中国科技论文》2013年第4期355-358,共4页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20090061110040);吉林省科技发展计划资助项目(20120324)

摘　　要：采用甲醇为溶剂合成了ZIF-8(分子筛咪唑酯骨架化合物)纳米晶材料,将碘成功掺入其(ZIF-8(I2))孔笼中。并且通过X射线衍射对ZIF-8进行了晶体结构表征,通过扫描电子显微镜对ZIF-8与ZIF-8(I2)进行了晶体形貌的表征。以ZIF-8(I2)为基体材料,采用涂膜法将其涂覆在Ag-Pd叉指电极上,制作成湿敏元件。对元件的湿敏性能进行测试,并且分析了ZIF-8(I2)的感湿机理。结果表明,中高湿条件下,元件阻抗随湿度变化的曲线有良好的线性关系,响应时间仅为25s,湿滞约为7%。ZIF-8 （zeolitic imidazolate frameworks） nanocrystals were synthesized using methanol as solvent, of which pores were successfully doped in with I2 （ZIF-8（I2））. The crystal structure of ZIF8 was characterized by X-ray diffraction （XRD）, and the morphology of ZIF8 and ZlF-8（I2） was observed by scanning electron microscope （SEM）. Then ZIF-8（I2） humidity sensor was fabricated by coating the nanocrystal materials on Ag-Pd interdigitated electrodes. The device shows a good impedance-RH （rela- tive humidity） relationship, and humidity sensing properties of the sensor based on ZIF-8（I2） were explored. Besides, complex impedance at different RHs was characterized to study sensing mechanism of ZIF-8 （I2）. The results indicate that the materials show high sensitivity at high relative humidity （RH）, response time is 25 s, and humidity hysteresis is about 7 ~.

关 键 词：纳米晶 ZIF-8(I2) 湿敏性能 感湿机理 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]