| Gas Sensing application of SiO2@MCM-41Core-Shell Nano-Structures in Detecting Ammonia |
| Paper ID : 1324-ICNS |
| Authors: |
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Samaneh Esmaeili *1, Mohammad Ali Zanjanchi1, Hossein Golmojdeh1, Shahab Shariati2 1University of Guilan 2Rasht Branch, Islamic Azad University |
| Abstract: |
| This study presents an effective and simple colorimetric probe for sensing ammonia in gas phase based on reaction of a sensitive dye loaded onto the silica based core–shell nano-structure. A core-shell nanostructure was designed and prepared via a sol-gel approach, and then a very simple impregnation method was employed to enrich it with a sensitive dye (Alizarin). Various analytical tools were used to characterize the structural and textural properties of prepared substrate which all of them proved the presence of a mesoporous system. A series of colorometric and spectroscopic experiments using diffuse reflectance spectroscope (DRS) were employed to investigate the extent of the changes in dye response. Certain concentrations of ammonia were released into a closed chamber with certain volume via evaporating ammonia solution on a hot plate. Also all responses were detectable with naked eye as long as the ammonia concentration in the air was more than 50 ppm. |
| Keywords: |
| Core-shell; Gas-Sensor; Photometric, MCM-41; Ammonia. |
| Status : Abstract Accepted (Poster Presentation) |