Characterization of multi-walled carbon nanotubes (MWNTs) synthesized by CCVD using zeolite template from acetylene

被引：11

作者：

Zhao, Wei ^{[1
]}

Seo, Dong Nam ^{[1
]}

Kim, Hyung Tae ^{[2
]}

Kim, Ik Jin ^{[1
]}

机构：

[1] Hanseo Univ, Inst Proc & Applicat Inorgan Mat PAIM, Dept Mat Sci & Engn, Seosan 356706, Chungnam, South Korea

[2] Korea Inst Ceram Engn & Technol KICET, Icheon Si 467843, Gyeonggi Do, South Korea

来源：

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2010年 / 118卷 / 1383期

关键词：

Multi-walled carbon nanotubes; Chemical vapor deposition; Catalyst; Zeolite; Template; CHEMICAL-VAPOR-DEPOSITION; CATALYTIC SYNTHESIS; GROWTH; PURIFICATION; TEMPERATURE; MEMBRANES; FE;

D O I：

10.2109/jcersj2.118.983

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High purity, multi-walled carbon nanotubes (MWNTs) were synthesized by catalytic chemical vapor deposition (CCVD) using acetylene as the carbon source based on a zeolite NaX template loaded with different iron contents. Well shaped zeolite NaX nanocrystals (FAU) of 50nm were synthesized by a hydrothermal method according to a well designed composition of 3.5Na(2)O:Al2O3:2.1SiO(2):1000H(2)O. The ion-exchange method was used for supporting different Fe2+ contents in the zeolite NaX nanocrystals to provide effective catalysts for carbon nanotube (CNT) formation. Thermal treatment of Fe2+-exchanged zeolite NaX nanocrystals resulted in the formation of alpha-Fe2O3 at phase at 450 degrees C in air. Transmission electron microscopy (TEM) images showed that the inner and outer tube diameters of the MWNTs were in the range of 3.8-5.0nm and 6.3-8.8nm, respectively, which were smaller than those of conventional thick MWNTs. The yield of the MWNTs was increased up to 47.1% with increasing iron content in pores of the zeolite crystals, which allowed the pores to be defined as containers for catalysts and as a guide template for MWNT growth. (C) 2010 The Ceramic Society of Japan. All rights reserved.

引用

页码：983 / 988

页数：6

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