Adsorption of methanol on mesoporous SBA-15 |
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Authors: | SA Mirji SB Halligudi Nalini E Jacob AB Gaikwad |
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Affiliation: | a Physical Chemistry Division, National Chemical Laboratory, Pune 411008, India b Inorganic and Catalysis Division, National Chemical Laboratory, Pune 411008, India c Center for Material Characterization, National Chemical Laboratory, Pune-411008, India |
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Abstract: | The adsorption of methanol on mesoporous SBA-15 has been studied by using Brunauer-Emmett-Teller (BET) surface area analysis, scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA). The BET surface area analysis shows decreases of the surface area from 387 to 383 m2/g, pore volume from 0.88 to 0.81 cm3/g and pore diameter from 9.07 to 8.4 nm after methanol adsorption. The appearance of strong IR bands at 2862 and 2964 cm− 1 due to methyl (-CH3) symmetric and asymmetric stretching demonstrate the presence of methanol and evidence of successful methanol adsorption. XPS results show increase of carbon and oxygen content on the surface of SBA-15. Thermogravimetric analysis shows that the methanol adsorbed on SBA-15 is stable up to a temperature of 265 °C and that the methanol adlayers decompose between 265 and 588 °C. |
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Keywords: | 68 18 -g 68 43 -h 68 47 Pe 81 16 Dn |
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