以3-碘基丙基三甲氧基硅烷为媒介,将具有氢键酸性化合物2,2-双(4-羟基苯基)六氟丙烷(BH-PHFP)嫁接到具有3D 介孔结构和高比表面积的KIT-5介孔材料上,得到有机磷检测敏感材料。利用TEM、HR-SEM、傅立叶红外光谱、N2吸附脱附等温曲线和热重分析对材料进行了表征,并与石英晶体微天平(QCM)结合构建质量敏感型气体传感器,可实现了对有机磷气体的痕量检测,该传感器且具有灵敏度高、重复性好和选择性高的优点。
The hydrogen-bond acid compound 2,2-bis (4-hydroxyphenyl)-hexafluoropropane (BHPHFP)has been used as a sensing group progressively grafted on the mesoporous-silica KIT-5 via chemical coupling reac-tion by 3-iodopropyl trimethoxysilane.Furthermore,it has been successfully characterized by transmission elec-tron microscopy (TEM),high resolution scanning electron microscopy (HR-SEM),Flourier transform infrared (FT-IR),N2 sorption isotherms and thermogravimetry analysis (TGA)curves.Then taking the quartz crystal microbalance sensor (QCM)as platform to form the organophosphorus vapor detection sensor,the QCM sensor obtains a higher sensitivity,repeatability and selectivity to detect the ppb-level concentration of organophospho-rus vapor.
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