Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 93, Issue 3, Pages 609-613Publisher
WILEY
DOI: 10.1111/j.1551-2916.2009.03461.x
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Funding
- Hong Kong Research Grant Council [PolyU 5309/08E]
- Hong Kong Polytechnic University [1-BB84]
- National Science Foundation of China (NSFC) [50572026, 50902046]
- Research Fund for the Doctoral Program of Higher Education of China [20070512003]
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Single-crystalline KTa0.25Nb0.75O3 (KTN) nanorods with an orthorhombic perovskite structure were synthesized via a polymer-assisted hydrothermal method. The preferred crystallographic orientation of the nanorods were found to be controllable by using different types of polymers in the process; that is, [001]-oriented KTN were obtained upon the use of polyvinyl alcohol (PVA) and [110]-oriented ones were formed with the use of a combination of polyacrylic acid and PVA. The two types of nanorods showed different properties. The [110]-oriented nanorods exhibited a better photocatalytic decolorization efficiency but very likely a lower thermal conductivity (as indicated by the Raman spectrum measurements) than the [001] nanorods.
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