Direct synthesis of single-walled aminoaluminosilicate nanotubes with enhanced molecular adsorption selectivity

Dun-Yen Kang, Nicholas A. Brunelli, G. Ipek Yucelen, Anandram Venkatasubramanian, Ji Zang, Johannes Leisen, Peter J. Hesketh, Christopher W. Jones () and Sankar Nair ()
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Dun-Yen Kang: School of Chemical & Biomolecular Engineering, Georgia Institute of Technology
Nicholas A. Brunelli: School of Chemical & Biomolecular Engineering, Georgia Institute of Technology
G. Ipek Yucelen: School of Materials Science and Engineering, Georgia Institute of Technology
Anandram Venkatasubramanian: G.W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology
Ji Zang: School of Chemical & Biomolecular Engineering, Georgia Institute of Technology
Johannes Leisen: School of Chemistry and Biochemistry, Georgia Institute of Technology
Peter J. Hesketh: G.W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology
Christopher W. Jones: School of Chemical & Biomolecular Engineering, Georgia Institute of Technology
Sankar Nair: School of Chemical & Biomolecular Engineering, Georgia Institute of Technology

Nature Communications, 2014, vol. 5, issue 1, 1-9

Abstract: Abstract Internal functionalization of single-walled nanotubes is an attractive, yet difficult challenge in nanotube materials chemistry. Here we report single-walled metal oxide nanotubes with covalently bonded primary amine moieties on their inner wall, synthesized through a one-step approach. Conclusive molecular-level structural information on the amine-functionalized nanotubes is obtained through multiple solid-state techniques. The amine-functionalized nanotubes maintain a high carbon dioxide adsorption capacity while significantly suppressing the adsorption of methane and nitrogen, thereby leading to a large enhancement in adsorption selectivity over unfunctionalized nanotubes (up to four-fold for carbon dioxide/methane and ten-fold for carbon dioxide/nitrogen). The successful synthesis of single-walled nanotubes with functional, covalently-bound organic moieties may open up possibilities for new nanotube-based applications that are currently inaccessible to carbon nanotubes and other related materials.

Date: 2014
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DOI: 10.1038/ncomms4342

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