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Journal of Nanomaterials
Volume 2014 (2014), Article ID 876571, 6 pages
Research Article

Anodic CaO-TiO2 Nanotubes Composite Film for Low Temperature CO2 Adsorption

Nanotechnology & Catalysis Research Centre (NANOCAT), Institute of Postgraduate Studies (IPS), Universiti Malaya, 3rd Floor, Block A, 50603 Kuala Lumpur, Malaysia

Received 12 January 2014; Revised 8 April 2014; Accepted 9 April 2014; Published 4 May 2014

Academic Editor: Sun-Hwa Yeon

Copyright © 2014 Chin Wei Lai. 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.


A novel one-dimensional anodic CaO-TiO2 nanotubes composite film was prepared using a rapid-anodic oxidation electrochemical anodization technique for low temperature CO2 absorption application. This study aims to determine the optimum concentration of Ca(NO3)2·4H2O used as the CaO precursor for loading CaO species on TiO2 nanotubes. In this study, an optimum content of CaO on TiO2 nanotubes (0.15 at% of Ca element) could enhance the CO2 adsorption capacity up to 2.45 mmol/g at 400°C. This behavior was attributed to the large active surface area of CaO species were covered on the surface of TiO2 nanotubes. The conversion of CaO into CaCO3 could be achieved effectively for CO2 absorption during the carbonate looping process.