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Controlled synthesis of single-crystal VOx·nH2O nanoribbons via a hydrothermal reduction method
- Source :
-
Journal of Solid State Chemistry . Mar2004, Vol. 177 Issue 3, p690. 6p. - Publication Year :
- 2004
-
Abstract
- VOx·nH2O (<f>2.0&les;x&les;2.5</f>) nanoribbons have been synthesized by direct hydrothermal processing of the aqueous solution of NH4VO3 and polyethylene glycol 400 (PEG-400) at pH 3.5–5.5. Techniques of XRD, SEM, TEM, HRTEM, ED, and XPS have been used to characterize the structure, morphology, and composition of the nanoribbons. The VOx·nH2O nanoribbons are up to ∼200 μm in length, 100–150 nm in width, 20–30 nm in thickness, and grow along the [010] direction. The ratios of V4+ to V5+ in the products can be readily controlled by carefully adjusting the periods of reaction time. PEG carries the roles of both transport and reducing agent. A coordination self-assembly mechanism was proposed to elucidate the formation of the VOx·nH2O nanoribbons. [Copyright &y& Elsevier]
- Subjects :
- *TRANSITION metals
*CHEMICAL reactions
*NANOSTRUCTURED materials
*X-ray diffraction
Subjects
Details
- Language :
- English
- ISSN :
- 00224596
- Volume :
- 177
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of Solid State Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 12504352
- Full Text :
- https://doi.org/10.1016/j.jssc.2003.08.035