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Amino-Functionalization and Enhanced Humidity Sensing Properties of MIL-125 Based on Quartz Crystal Microbalance Sensor |
Author Name | Affiliation | E-mail | WU Yue-Tao | College of Material Science and Engineering, Hunan University, Changsha 410082, China | | FAN Yu | NEST Lab, Department of Physics, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China | | LIU Yan-Li | College of Material Science and Engineering, Hunan University, Changsha 410082, China | yanliliu@hnu.edu.cn | XU Jia-Qiang | NEST Lab, Department of Physics, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China | xujiaqiang@shu.edu.cn |
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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 |
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WU Yue-Tao,FAN Yu,LIU Yan-Li,XU Jia-Qiang.Amino-Functionalization and Enhanced Humidity Sensing Properties of MIL-125 Based on Quartz Crystal Microbalance Sensor[J].Chinese Journal of Inorganic Chemistry,2019,35(4):635-642. |
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