Preparation and characterization of molybdenum carbides/carbon composites with high specific surface area

被引：10

作者：

Liu, Wei ^{[1
]}

Soneda, Yasushi ^{[1
]}

Kodama, Masaya ^{[1
]}

Yamashita, Junya ^{[1
]}

Hatori, Hiroaki ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058569, Japan

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 17-18期

关键词：

molybdenum carbides; porous carbon; composite; surface area;

D O I：

10.1016/j.matlet.2008.01.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Molybdenum carbides/carbon composites (MCCs) with high specific surface area were prepared using the direct carbonization of a mixture of hydroxylpropyl cellulose, polyvinyl alcohol, K2MoO4 and K2CO3 at 900 degrees C in flowing Ar. X-ray diffraction pattern showed the formation of alpha-Mo2C with small amount of Mo3C2 in carbon matrix. The particle size of carbides in MCCs varied from ca. 50 nm to 5 mu m by changing the precursor ratio. The BET specific surface areas of the synthesized MCCs could be controlled from 400 to 1200 m(2)/g depending on the amount of K2CO3 added during the preparation by increasing the microporosity. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：2766 / 2768

页数：3

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