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Journal of Nanomaterials
Volume 2012 (2012), Article ID 920483, 7 pages
http://dx.doi.org/10.1155/2012/920483
Research Article

Chemical Tuning of Adsorption Properties of Titanate Nanotubes

1Faculty of Materials Science, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119992, Russia
2Faculty of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119992, Russia

Received 14 May 2012; Accepted 16 November 2012

Academic Editor: Jinquan Wei

Copyright © 2012 Anastasia V. Grigorieva et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A conventional hydrothermal method widely used for the preparation of titania-based nanotubes still generates many unsolved questions. One of them is definitely connected with the influence of a posthydrothermal treatment of titania nanotubes on their micromorphology, structure, and adsorption characteristics. Here, it was analyzed systematically by a group of methods including nitrogen adsorption and temperature-programmed desorption of ammonia and carbon dioxide. It is proved that adsorption characteristics and the surface state of titania nanotubes correlate with a sodium content, since sodium ions act as Lewis acid sites and shield Ti4+ acid sites of the nanotubes. To obey a balance between chemical and heat treatments of the nanotubes to design their functional properties has been suggested.