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International Journal of Photoenergy
Volume 2009 (2009), Article ID 240402, 8 pages
http://dx.doi.org/10.1155/2009/240402
Research Article

Hydrothermal Preparation of -Doped Titanate Nanotubes: Magnetic Properties and Photovoltaic Performance

1Environmental Studies and Research Institute (ESRI), Minoufiya University, Sadat Branch, 32897 Sadat City, Egypt
2Nano-Photochemistry and Solarchemistry Laboratories, Department of Chemistry, Faculty of Science, Ain Shams University, Abbassia, 11566 Cairo, Egypt
3Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, 32897 Cairo, Egypt
4Energy Conversion Systems Laboratory, Department of Mechanical Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
5Semi-Conductor Laboratory, Physics Department, Faculty of Education, Ain Shams University, Roxy, 32897 Cairo, Egypt
6Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warszawa, Poland

Received 9 September 2009; Accepted 6 November 2009

Academic Editor: Frank NĂ¼esch

Copyright © 2009 Hoda S. Hafez 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

Pure and -doped titanate nanotubes (TNTs) materials were synthesized by a hydrothermal method. Their morphology, optical properties, thermal stability, and magnetic properties were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), UV-Vis spectroscopy, thermal analysis, and magnetic measurements. It was found that doping renders -TNT visible light active and results in smaller crystallite size and larger surface area as well as higher thermal stability compared to pure titanate nanotubes. The estimated magnetic moments point to presence of weak antiferromagnetic interaction. Application of the prepared -TNT for modifying conventional photoanodes in polymer solar cells was attempted. Preliminary results show slightly improved photovoltaic energy conversion efficiency in the devices containing the newly designed -doped nanotubes.