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• W3105655448 abstract "Abstract In this present work, we successfully prepared aminated silica (ASiO 2 ) from rice husk ash (RHA) and functionalized with 3-aminopropyltriethoxysilane (APTES). Physical and chemical properties of the synthesized material were investigated by various techniques SEM–EDX, XPS, FTIR, TGA. The surface area of RHA was 223 m 2 /g, while for ASiO 2 was 101 m 2 /g. Molecular level DFT calculations revealed that the functionalization of ASiO 2 resulted in a significant decrease in the HOMO–LUMO energy gap, a reduction in hardness, and a consequent increase in charge transfer characteristics. The adsorption behavior at low pressure (1 atm.) of aminated silica on different gases CO 2 , CH 4 , H 2 , and N 2 at temperatures 77, 273, 298 K was studied. The adsorption of hydrogen was reported for the first time on aminated silica with an excellent adsorption capacity of 1.2 mmol/g. The ASiO 2 exhibited excellent performance in terms of gas separation in binary mixtures of CO 2 /CH 4 , CO 2 /N 2 and CO 2 /H 2 at 273, and 298 K, respectively. The catalyst further exhibits high stability during three cycles with less than 10% variation in the separation capacity." @default.
• W3105655448 created "2020-11-23" @default.
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• W3105655448 date "2020-11-11" @default.
• W3105655448 modified "2023-09-30" @default.
• W3105655448 title "Rice husk derived Aminated Silica for the efficient adsorption of different gases" @default.
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• W3105655448 doi "https://doi.org/10.1038/s41598-020-76460-0" @default.
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