Issue 4, 2016

Amine-modified silica nanotubes and nanospheres: synthesis and CO2 sorption properties

Abstract

Silica nanotubes (SNT) and silica nanospheres (SNS) were prepared in the presence of Pluronic F127 triblock copolymer. Post-synthesis grafting and co-condensation were used to introduce aminopropyl groups on the surface of SNT and SNS, respectively. Nitrogen adsorption was employed to evaluate the surface area and porosity of unmodified and modified SNT and SNS. These materials were tested for CO2 capture at ambient (25 °C) and elevated (120 °C) temperatures and showed high sorption uptakes (0.91–2.87 mmol g−1) at 120 °C. The CO2 uptakes obtained at 1.2 atm and 25 °C for SNT, SNS, and aminopropyl-modified SNT and SNS are 2.81, 2.06, 2.35, and 1.54 mmol g−1, respectively. The microporosity of the samples was shown to be beneficial for CO2 physisorption under ambient conditions, while basic amine groups were essential for enhancing CO2 chemisorption at elevated temperatures.

Graphical abstract: Amine-modified silica nanotubes and nanospheres: synthesis and CO2 sorption properties

Supplementary files

Article information

Article type
Paper
Submitted
01 May 2016
Accepted
30 May 2016
First published
01 Jun 2016

Environ. Sci.: Nano, 2016,3, 806-817

Amine-modified silica nanotubes and nanospheres: synthesis and CO2 sorption properties

C. Gunathilake, A. S. Manchanda, P. Ghimire, M. Kruk and M. Jaroniec, Environ. Sci.: Nano, 2016, 3, 806 DOI: 10.1039/C6EN00125D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements