Abstract
Nanoscale silica aerogels have a large surface area, low density, high porosity, and poor electrical and thermal conductivity. Sol–gel involves supercritical drying of wet silica gels to make silica aerogels that limit synthesis due to efficiency and costs. Ambient pressure drying utilizing methyltrimethoxysilane as a precursor is expected to increase commercially. The method produces silica aerogels with a very low bulk density and a high specific surface area of 0.083 g/cm3 and 787 m2/g, respectively, with an average pore diameter of 18.7 nm at a MeOH/MTMS molar ratio of 1::35. This aerogel has contact angle as high as 153° and exhibits remarkable chemical absorption (5–11 times) and recyclability for substances such as organic liquids and oils.
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Sharma, J., Shukla, S. & Behera, B.K. Fast production of silica aerogel using methyltrimethoxysilane by ambient drying process for superior chemical adsorption properties. J Porous Mater 30, 1663–1673 (2023). https://doi.org/10.1007/s10934-023-01455-x
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DOI: https://doi.org/10.1007/s10934-023-01455-x