Enhancement of catalytic activity by addition of chlorine in chemical vapor deposition growth of carbon nanotube forests

被引：0

作者：

Kinoshita, Toshiya ^{[1
]}

Karita, Motoyuki ^{[2
]}

Chikyu, Norikazu ^{[1
]}

Nakano, Takayuki ^{[1
,2
,3
]}

Inoue, Yoku ^{[1
,2
]}

机构：

[1] Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka,432-8561, Japan

[2] Department of Electronics and Materials Science, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka,432-8561, Japan

[3] Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka,432-8011, Japan

来源：

Carbon | 2022年 / 196卷

基金：

日本科学技术振兴机构;

关键词：

Carbon nanotubes - Catalyst activity - Chlorine - Crystal impurities - Crystals - Forestry - Growth rate - Precipitation (chemical) - Spinning (fibers);

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In carbon nanotube (CNT) growth, the role of catalytic nanoparticles involves complex processes of feedstock gas decomposition, carbon feedstock transport, and CNT crystal precipitation. We report on the improvement of the catalytic activity by chlorine addition during the CNT forest growth process. The addition of Cl2 enhanced the diffusion rate of carbon in the catalysts, and thus changed the rate-limiting step from iron diffusion in the catalyst to the feedstock gas decomposition on the catalyst surface, leading to a higher growth rate and longer catalyst lifetime. The addition of Cl2 directly affected numerous CNT structural parameters, including the CNT diameter, number of walls, and crystal quality. Furthermore, the Cl2 addition made the CNT forest super-aligned, and it enhanced the dry spin capability of the CNT forests, allowing CNT webs to be continuously drawn from the forests. © 2022 Elsevier Ltd

引用

页码：391 / 400

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