Synthesis of nanocrystalline nitrogen-rich carbon nitride powders at high pressure

被引：39

作者：

Andreyev, A ^{[1
]}

Akaishi, M ^{[1
]}

Golberg, D ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan

来源：

关键词：

synthesis; carbon nitride; high pressure; spectroscopy;

D O I：

10.1016/S0925-9635(02)00211-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nitrogen-rich carbon nitride powders with composition close to C4N2.8-3.3 were synthesized by using a chemical reaction between sodium azide and hexachlorobenzene under high pressure (7.7 GPa) and a temperature of 500 degreesC for 30 min. The final black powders were relatively hard materials with high resistance to hot acids and common organic solvents. Analytical electron microscopy and X-ray diffraction studies showed that the powders are predominantly amorphous, containing nanometer-sized crystallites. Carbon and nitrogen K-edge structures obtained by electron energy-loss spectroscopy suggest the existence of chemical bonding between C and N, and that the amorphous carbon nitride matrix is primarily sp(2)-bonded. Raman and infrared features of the carbon nitride powders closely resemble those in carbon and diamond-like films and also characterize the powders as strongly disordered, sp(2)-bonded carbon nitride exhibiting graphite-like microdomains with dimensions of approximately 1 nm. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：1885 / 1889

页数：5

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