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Nitridation of Silica to an α-Silicon Nitride Nanorod Using NaNH2 in the Autoclave at 700°C

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α-silicon nitride nanorods have been synthesized through solid-state reduction–nitridation of silica using NaNH2 as both a reductant and a nitriding reagent. X-ray powder diffraction patterns show that the products have a hexagonal phase with lattice parameters a=7.767 Å and c=5.630 Å. Transmission electron microscopy reveals that the as-synthesized products are pure nanorods with an average size about 30 nm in diameter and 400 nm in length. X-ray photoelectron spectra indicate that the molar ratio of Si/N is 2.988:4. Fourier-transform infrared spectrum yields a strong Si–N absorption at 926 cm−1 that may be a red shift due to size effect.
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Document Type: Research Article

Affiliations: 1: Hefei National Laboratory of Physical at Microscale, University of Science and Technology of China, Hefei 230026, China 2: Department of Chemistry, Jinan University, Guangzhou 510623, China

Publication date: April 1, 2007

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