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Issue 12, 2019
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Solution-phase synthesis of two-dimensional silica nanosheets using soft templates and their applications in CO2 capture

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Abstract

The solution-phase synthesis of silica nanosheets with tunable thickness and textural properties is still a challenge. We have developed a robust protocol to synthesize silica nanosheets using lamellar micelles as soft templates in a water–cyclohexane solvent mixture. The synthesized silica nanosheets (∼3.7 nm) possess significantly improved textural properties, with as high as 1420 m2 g−1 surface area and 3.47 cm3 g−1 pore volume. When functionalized with tetraethylenepentamine (TEPA) molecules using a physisorption method, the silica nanosheets showed a CO2 working capture capacity of 3.8 mmol g−1 at 75 °C with fast capture kinetics and good sorbent stability.

Graphical abstract: Solution-phase synthesis of two-dimensional silica nanosheets using soft templates and their applications in CO2 capture

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Supplementary files

Article information


Submitted
15 Dec 2018
Accepted
19 Feb 2019
First published
20 Feb 2019

Nanoscale, 2019,11, 5365-5376
Article type
Paper

Solution-phase synthesis of two-dimensional silica nanosheets using soft templates and their applications in CO2 capture

B. Singh and V. Polshettiwar, Nanoscale, 2019, 11, 5365
DOI: 10.1039/C8NR10119A

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