MIL-125(Ti)及其氨基功能化材料修饰石英晶体微天平的湿敏性能
Amino-Functionalization and Enhanced Humidity Sensing Properties of MIL-125 Based on Quartz Crystal Microbalance Sensor
作者单位E-mail
武月桃 湖南大学, 材料科学与工程学院, 长沙 410082  
樊煜 上海大学, 理学院化学系NEST实验室, 上海 200444  
刘艳丽 湖南大学, 材料科学与工程学院, 长沙 410082 yanliliu@hnu.edu.cn 
徐甲强 上海大学, 理学院化学系NEST实验室, 上海 200444 xujiaqiang@shu.edu.cn 
摘要: 采用简单的溶剂热法制备金属有机框架化合物MIL-125(Ti)和NH2-MIL-125(Ti)材料,并通过X射线衍射仪、扫描电子显微镜、傅氏转换红外线光谱分析仪和比表面积测试仪对所得样品进行表征。将2种材料修饰构建为石英晶体微天平传感器,测试其在11%~97% RH相对湿度范围内的湿度感测性能。实验结果表明,基于MIL-125(Ti)和NH2-MIL-125(Ti)构建的传感器对湿度具有灵敏度高、重复性好、响应/恢复快等特点。相对于没有氨基修饰的MIL-125(Ti),NH2-MIL-125(Ti)材料修饰的传感器对湿度表现出更高的响应性能。在环境湿度约52%时,NH2-MIL-125(Ti)传感器对11% RH湿度响应值比MIL-125(Ti)湿度传感器的大57 Hz,说明氨基功能化对MIL-125(Ti)的湿敏性能有显著的增强作用。此外,通过Materials Studio模拟计算获得了水分子与MIL-125(Ti)及NH2-MIL-125(Ti)作用的吸附焓,也证明氨基功能化对MIL-125(Ti)的湿度敏感性能具有增强作用。
关键词: 金属有机框架  石英晶体微天平  相对湿度  氨基功能化  湿度传感器
基金项目: 国家自然科学基金重大仪器专项项目(No.61527818)、上海市科委重大专项项目(No.17010500500)资助。
Abstract: The metal organic framework compounds MIL-125(Ti) and NH2-MIL-125(Ti) were prepared and chara-cterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR)and specific surface area (BET). The humidity sensing performances of the two materials based QCM sensors were studied by exposed to humidity range of 11%~97%RH (relative humidity). The experimental results show that the MIL-125(Ti) and NH2-MIL-125(Ti) sensors have some advantages, such as high sensitivity, good repeatability, fast response/recovery and etc. Compared with MIL-125(Ti), the sensor modified by NH2-MIL-125(Ti) exhibited higher response to humidity.when the indoor humidity was about 52%, the frequency shift of the NH2-MIL-125(Ti) sensor to a 11% relative humidity was 57 Hz higher than MIL-125(Ti), indicating that the amino-functionalized material had a certain enhancement to the response of the humidity sensor. Furthermore, the adsorption enthalpys between water molecules and MIL-125(Ti) or NH2-MIL-125(Ti) was obtained by Materials Studio, which proved that the amino functionalization could enhance the humidity sensitivity of MIL-125(Ti).
Keywords: metal-organic framework  quartz crystal microbalance  relative humidity  amino-functionalization  humidity sensor
投稿时间:2018-11-08 修订日期:2019-02-14
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武月桃,樊煜,刘艳丽,徐甲强.MIL-125(Ti)及其氨基功能化材料修饰石英晶体微天平的湿敏性能[J].无机化学学报,2019,35(4):635-642.
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