Issue 12, 2019

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

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

Supplementary files

Article information

Article type
Paper
Submitted
15 Dec 2018
Accepted
19 Feb 2019
First published
20 Feb 2019

Nanoscale, 2019,11, 5365-5376

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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