NG.2 - Synthesis of amino-functionalized MIL-101(Cr) as high performance HF gas sensor
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- New Materials for Gas Sensing
- J. Xu - NEST Lab, Department of chemistry, College of Science, Shanghai University, Shanghai (China), Y. Wu, Y. Liu - College of Materials Science and Engineering, Hunan University, Changsha (China)
- 346 - 347
Metal-organic frameworks have attracted much attention because of their potential applications in many fields such as catalysis, adsorption, sensors, and environmental remediation due to their controllable composition, structure and pore size. In this work,The Amino-functionalized metal-organic framework NH2-MIL-101(Cr), Containing 2-aminobenzene-1,4-dicarboxylate as the linker, has been synthesized. The morphologies, microstructures and compositional characteristics of the NH2-MIL- 101(Cr) were sufficiently examined by X-ray diffraction (XRD), nitrogen sorption analysis, scanning electron microscopy (SEM), and transmission electron microscope (TEM). In this study, a hydrogen fluoride sensor was fabricated by drop-casting a NH2-MIL-101(Cr) onto a quartz crystal microbalance (QCM). The sensor were investigated under different concentrations of hydrogen fluoride gas from 500ppb to 15 ppm at room temperature. Upon exposure to hydrogen fluoride gas, the oscillation frequency of the QCM decreased immediately. The sensor can be regenerated by purging it with nitrogen gas, indicating reversibility of the response. The experimental results showed that the hydrogen fluoride gas sensor has a quite sensitive response, good repeatability and selectivity.