P2NG.2 - A benzene vapor sensor with avoiding humidity false response based on metal-organic framework-modified quartz crystal microbalance
- Event
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria - Chapter
- P-2 - Nanomaterials for Gas Sensing
- Author(s)
- Z. Ma, Z. Cheng, Q. Xiang, X. Wang, J. Xu - NEST Lab, Department of chemistry, College of Science, Shanghai University, Shanghai (China)
- Pages
- 848 - 849
- DOI
- 10.5162/IMCS2018/P2NG.2
- ISBN
- 978-3-9816876-9-9
- Price
- free
Abstract
As one of typical VOCs,benzene is seriously harmful to human health. There is really lack of portable sensing method to directly detect benzene in air duo to its chemical inertness. Herein the metalorganic framework(MOF) of MOF-14(Cu3(BTB)2(H2O)32(DMF)9(H2O)2 MOF-14 is first explored for sensing to the nonpolar molecule of benzene. In previous studies, adsorption experiments all use the dry gas that neglect the influence of humidity, so we used a new method to detect benzene in order to avoid water vapor false response for practical use. By loading MOFs on quartz crystal microbalance(QCM), sensing experiments for four MOFs of MOF-177, HKUST-1, MOF-74, and MOF-14 approve that MOF-14 has a high selectivity, repeatability, long-term stability for benzene detection. The adsorption mechanism of benzene on sensor was identified that is via host-guest interaction of MOF with benzene molecule and studied by Van der Waals corrected density functional theory calculation.