Orientation-Control Synthesis of KTa0.25Nb0.75O3 Nanorods
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, -oriented KTN were obtained upon the use of polyvinyl alcohol (PVA) and -oriented ones were formed with the use of a combination of polyacrylic acid and PVA. The two types of nanorods showed different properties. The -oriented nanorods exhibited a better photocatalytic decolorization efficiency but very likely a lower thermal conductivity (as indicated by the Raman spectrum measurements) than the  nanorods.
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Document Type: Research Article
Key Laboratory of Ferro- & Piezoelectric Materials and Devices of Hubei Province, Faculty of Physics & Electronic Technology, Hubei University, Wuhan 430062, China
Department of Applied Physics and Material Research Center, The Hong Kong Polytechnic University, Hong Kong SAR, China
Publication date: 2010-03-01