期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 471, 期 1-2, 页码 166-171出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2008.03.037
关键词
MWCNTs; CoPd; Catalysts; Ethanol; Spray pyrolysis
资金
- Ministry of Education, Culture, Sports, Science and the Technology (MEXT) of Japan
A spray-pyrolysis technique for the direct synthesis of multi-wall carbon nanotubes (MWCNTs) on a hexagonal boron nitride (hBN) matrix has been developed. Cobalt palladium (CoPd) nanoparticles, hBN nanoparticles, and ethanol were used as the catalyst, matrix, and carbon source, respectively. The materials were mixed by ultrasonication and then sprayed into a vertical tubular reactor at 900 degrees C under an argon flow of 2L/min. As the aerosol passed through the reactor, the following processes occurred sequentially: solvent evaporation; formation of spherical particles composed of hBN and CoPd nanoparticles; catalytic decomposition of ethanol; and CNT growth on the surface of the CoPd nanoparticles. As a result, spherical-hairy particles were obtained, and both the hBN hexagonal phase and primary particle diameter were maintained during the reaction pathway because of the short residence time (1s). The results showed that the spray-dried particle size and population of MWCNTs depended on the residence time within the heating zone and on the initial CoPd concentration. The novel synthesis technique described in this paper can be broadly applied to the production of various types of functional inorganic material/CNT composite particles. (c) 2008 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据