dc.contributor.author | Gravani, S. | en |
dc.contributor.author | Polychronopoulou, K. | en |
dc.contributor.author | Stolojan, V. | en |
dc.contributor.author | Cui, Q. | en |
dc.contributor.author | Gibson, P. N. | en |
dc.contributor.author | Hinder, S. J. | en |
dc.contributor.author | Gu, Z. | en |
dc.contributor.author | Doumanidis, C. C. | en |
dc.contributor.author | Baker, M. A. | en |
dc.contributor.author | Rebholz, Claus | en |
dc.creator | Gravani, S. | en |
dc.creator | Polychronopoulou, K. | en |
dc.creator | Stolojan, V. | en |
dc.creator | Cui, Q. | en |
dc.creator | Gibson, P. N. | en |
dc.creator | Hinder, S. J. | en |
dc.creator | Gu, Z. | en |
dc.creator | Doumanidis, C. C. | en |
dc.creator | Baker, M. A. | en |
dc.creator | Rebholz, Claus | en |
dc.date.accessioned | 2019-05-06T12:23:38Z | |
dc.date.available | 2019-05-06T12:23:38Z | |
dc.date.issued | 2010 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/48374 | |
dc.description.abstract | γ - Al 2 O 3 is a well known catalyst support. The addition of Ce to γ - Al 2 O 3 is known to beneficially retard the phase transformation of γ - Al 2 O 3 to α - Al 2 O 3 and stabilize the γ-pore structure. In this work, Ce-doped γ - Al 2 O 3 nanowires have been prepared by a novel method employing an anodic aluminium oxide (AAO) template in a 0.01 M cerium nitrate solution, assisted by urea hydrolysis. Calcination at 500 °C for 6 h resulted in the crystallization of the Ce-doped AlOOH gel to form Ce-doped γ - Al 2 O 3 nanowires. Ce 3 + ions within the nanowires were present at a concentration of < 1 at.%. On the template surface, a nanocrystalline CeO 2 thin film was deposited with a cubic fluorite structure and a crystallite size of 6–7 nm. Characterization of the nanowires and thin films was performed using scanning electron microscopy, transmission electron microscopy, electron energy loss spectroscopy, x-ray photoelectron spectroscopy and x-ray diffraction. The nanowire formation mechanism and urea hydrolysis kinetics are discussed in terms of the pH evolution during the reaction. The Ce-doped γ - Al 2 O 3 nanowires are likely to find useful applications in catalysis and this novel method can be exploited further for doping alumina nanowires with other rare earth elements. | en |
dc.source | Nanotechnology | en |
dc.source.uri | http://stacks.iop.org/0957-4484/21/i=46/a=465606 | |
dc.title | Growth and characterization of ceria thin films and Ce-doped γ - Al 2 O 3 nanowires using sol-gel techniques | en |
dc.type | info:eu-repo/semantics/article | |
dc.description.volume | 21 | |
dc.author.faculty | Πολυτεχνική Σχολή / Faculty of Engineering | |
dc.author.department | Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering | |
dc.type.uhtype | Article | en |
dc.description.totalnumpages | 465606 | |