Synthesis of High-Purity Boron Nitride Nanocrystal at Low Temperatures

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• 作者：Li Hou ; Faming Gao ; Guifang Sun ; Huiyang Gou ; Min Tian
• 刊名：Crystal Growth & Design
• 出版年：2007
• 出版时间：March 2007
• 年：2007
• 卷：7
• 期：3
• 页码：535 - 540
• 全文大小：542K
• 年卷期：v.7,no.3(March 2007)
• ISSN：1528-7505

文摘

High-purity nanocrystalline boron nitride has been successfully synthesized by a simple synthesis method usingamorphous B powder and NaN₃ as the reactants and anhydrous CH₃CN as the solvent at 380 C. Results from XRD, FT-IR, EELS,and BET absorption measurements suggest that the synthesized product can be indexed as pure hexagonal BN with lattice constantsof a = 2.497 Å and c = 6.678 Å, and the specific surface area of product is 52.19 m²/g. The TEM images show the multiplex beltspherelike, fiberlike, sheetlike, and tubelike morphologies of the products. Here, the multiplex belt spherelike and sheetlike structuresare reported for the first time. When the temperature of reaction and the solvent are controlled, BN products with particularmorphologies can be selectively produced. The optical properties of the product are observed in the PL spectra, which shows thatthe as-prepared BN emits strong visible luminescence at 580 nm (_ex = 325 nm).