Implications of precursor chemistry on the alkaline hydrothermal synthesis of titania/titanate nanostructures
Data(s) |
2010
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Resumo |
A systematic study of four parameters within the alkaline hydrothermal treatment of three commercial titania powders—anatase, rutile, and Degussa P25—was made. These powders were treated with 5, 7.5, 9, and 10 M NaOH between 100 and 220 °C for 20 h. The effects of alkaline concentration, hydrothermal temperature, and precursor phase and crystallite size on the resultant nanostructure formation have been studied through X-ray diffraction, Raman spectroscopy, transmission electron microscopy, and nitrogen adsorption. Through the correlation of these data, morphological phase diagrams were constructed for each commercial powder. Interpretation of the resultant morphological phase diagrams indicates that alkaline concentration and hydrothermal temperature affect nanostructure formation independently, where nanoribbon formation is significantly influenced by temperature for initial formation. The phase and crystallite size of the precursor also significantly influenced nanostructure formation, with rutile displaying a slower rate of precursor consumption compared with anatase. Small crystallite titania precursors formed nanostructures at reduced hydrothermal temperatures. |
Formato |
application/pdf |
Identificador | |
Publicador |
American Chemical Society |
Relação |
http://eprints.qut.edu.au/29617/2/29617.pdf DOI:10.1021/jp908508z Morgan, Dana L., Liu, Hong-Wei, Frost, Ray L., & Waclawik, Eric R. (2010) Implications of precursor chemistry on the alkaline hydrothermal synthesis of titania/titanate nanostructures. Journal of Physical Chemistry C : Nanomaterials and Interfaces, 114(1), pp. 101-110. |
Direitos |
Copyright 2010 American Chemical Society |
Fonte |
Faculty of Science and Technology; Institute for Sustainable Resources; School of Physical & Chemical Sciences |
Palavras-Chave | #030304 Physical Chemistry of Materials #030206 Solid State Chemistry #030306 Synthesis of Materials #titania nanotube #layered titanate #hydrothermal synthesis #phase diagram |
Tipo |
Journal Article |