Preparation and structural characterization of nanocrystalline SnO2 powders
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- Zheng, M., Ma, L., Xu, W. et al. Appl. Phys. A (2005) 81: 721. doi:10.1007/s00339-005-3223-3
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Nanocrystalline SnO2 powders have been prepared by solid–liquid reaction and solid-state thermal oxidizing techniques. The microstructures and phase compositions of the product were characterized by thermogravimetry analysis, X-ray diffraction, and the Raman spectrum. It is shown that at least two phases, SnO2 and SnOx, coexist at 450 °C. However, only the tetragonal rutile structure SnO2 phase is detected after the Sn powders were annealed at 550 °C. The Raman peaks of the nanocrystalline SnO2 powders reveal remarkable red shift and broadening, which could be attributed to the phonon confinement effect, oxygen vacancies, and the stress effect.