Synthesis of TiN Nanocrystals with High Specific Surface Area by Hydrazide Sol-gel Method

Chem. J. Chinese Universities

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Synthesis of TiN Nanocrystals with High Specific Surface Area by Hydrazide Sol-gel Method

LIU Mei-Ying, YOU Wan-Sheng, LEI Zhi-Bin, ZONG Xu, YING Pin-Liang, LI Can

State Key Laboratory of Catalysis Basis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

Received:2005-10-21 Revised:1900-01-01 Online:2006-08-10 Published:2006-08-10
Contact: LI Can

Abstract

Abstract: Nanocrystalline TiN with a high specific surface area was successfully prepared by the hydrazide sol-gel method with N₂H₄ as the nitrogen source. The effects of Ti sources, heat-treatment atmospheres, and temperature on the crystallization of TiN powder were studied and the crystallization mechanism of TiN nanocrystals was also discussed. TiCl₃ is superior to TiCl₄ and isopropoxide in the formation of well-crystallized TiN nanocrystals. NH₃ has the advantage over N₂ and Ar in the complete removal of residual carbon in TiN powder. In comparison with the traditional temperature-programmed reduction under flowing NH3 atmosphere, the hydrazide sol-gel route requires a relatively low temperature on the one hand(600 ℃) and TiN powder prepared by this synthetic approach exhibits a small particle size(10 nm) and an exceedingly high specific surface area(>135 m²/g) and disperses uniformly on the other hand. We expect that this methodology will provide a novel low-temperature route to synthesize nanocrystalline transition metal nitrides through choosing hydrazine as N-source precursor.

Key words: Hydrazine, Sol-gel, Low temperature, High specific surface area, Nano TiN

CLC Number:

O648

TrendMD:

LIU Mei-Ying, YOU Wan-Sheng, LEI Zhi-Bin, ZONG Xu, YING Pin-Liang, LI Can. Synthesis of TiN Nanocrystals with High Specific Surface Area by Hydrazide Sol-gel Method[J]. Chem. J. Chinese Universities, doi: .

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Synthesis of TiN Nanocrystals with High Specific Surface Area by Hydrazide Sol-gel Method

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