Journal
CERAMICS INTERNATIONAL
Volume 38, Issue 1, Pages 861-865Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2011.06.054
Keywords
Electron microscopy; Nanostructures; Layered compounds
Categories
Funding
- Program of Excellent Team
- Internationalization Foundation at Harbin Institute of Technology
- Postdoctoral Science Foundation of Heilongjiang Province [LBH-Z08112]
- China Postdoctoral Science Foundation [20080440126, 200902381]
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We report the topochemical synthesis of lamellar niobic acid (H2Nb2O6) nanorods via proton-exchange from single-crystal CaNb2O6 nanorods with layered structure. The obtained H2Nb2O6 nanorods were then converted to T-Nb2O5 nanorods with a pseudo-hexagonal structure by thermal treatment in air. The one-dimensional characteristic of the CaNb2O6 nanorods remained during their transformation to H2Nb2O6 and then to T-Nb2O5 nanorods. The structure transformation during the formation of T-Nb2O5 nanorods was investigated in detail using high-resolution transmission electron microscopy, and the results show that polycrystalline Nb2O5 nanorods were formed although the one-dimensional characteristic was well retained. The existence of texturing as well as dislocations in T-Nb2O5 nanorods was revealed. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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