Hydrogen-Bond Acid Group Functionalized Mesoporous-Silica MCM-41 as Sensing Material to Detect Trace Level Organophosphorus Vapor

Abstract

The hydrogen-bond acid compound 2,2-bis (4-hydroxyphenyl)-hexafluoropropane (BHPHFP) has been used as the sensing group progressively grafted on the mesoporous-silica MCM-41 carrier featured higher BET surface area via chemical coupling reaction by trimethoxysilanebutyraldehyde. Furthermore, it is successfully characterized by transmission electron microscopy (TEM), high resolution scanning electron microscopy (HR-SEM), flourier transform infrared (FT-IR) and N2 sorption isotherms. Then taking the quartz crystal microbalance sensor (QCM) as platform to form the organophosphorus vapor detection sensor, the sensing date of QCM sensor obtains the high sensitivity, repeatability and selectivity properties to detect the ppb-level concentration of organophosphorus vapor, which strongly testify the new material is a suitable sensing material for detecting organophosphorus trace-level vapor.