Ionic liquids used as QCM coating materials for the detection of alcohols |
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| Authors: | Xiuming Changzhi Kemei Kun Zongbao K Haiyang |
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| Affiliation: | aDalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China;bDepartment of Chemistry and the Key Laboratory of ATMMT(MOE), Zhejiang Sci-Tech University, Hangzhou 310018, PR China;cGraduate School of Chinese Academy of Sciences, Beijing 100039, PR China |
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| Abstract: | Six imidazolium-based ionic liquids (ILs) were synthesized and employed as sensing materials coated on quartz crystal microbalance for the detection of organic vapors. Acetone, ethanol, dichloromethane, benzene, toluene and hexane were selected as representatives for common environmental pollutants, and good linear responses from 0 to 100% of concentrations were observed. The halogen-anion-containing imidazolium ILs-coated sensors showed fast response, excellent reversibility, and considerable sensitivity and selectivity towards alcohols, and the selective factors were up to 30 times for ethanol versus other VOCs. The existence of water vapor reduced the frequency response of the sensor, but a good linear relationship remained. |
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| Keywords: | Quartz crystal microbalance Ionic liquids Alcohol sensor Volatile organic compounds |
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