Effect of H2 gas on carbon nanotubes synthesis

U. C. Chung; D. B. Lee; Y. U. Jeong; M. J. Ha; W. S. Chung

doi:10.4028/0-87849-960-1.3559

Effect of H₂ gas on carbon nanotubes synthesis

U. C. Chung, D. B. Lee, Y. U. Jeong, M. J. Ha, W. S. Chung

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

The effect of H₂ gas during the carbon nanotubes (CNTs) synthesis with CO-H₂ gas mixture was investigated using by mass measurement, and scanning electron microscopy (SEM). The maximum weight and yield of the synthesized carbon (C) were obtained when the mixture ratio of H₂:CO was 3:7 and 9:1, respectively. In case of 100% carbon monoxide (CO) without hydrogen (H₂) addition, the weight of carbon increased, but CNTs were not observed. The CNTs were formed when the contents of Ha reaches at least 10%, and their structures became more distinct with an increase of H₂ addition, and then the shapes of CNTs were more thin and straight. When the contents of H₂ was 80% (H₂:CO = 8:2), the shapes and growth of CNTs showed an optimal condition. On the other hand, when the contents of H₂ was higher than the critical value, the shapes of CNTs became worse due to transition into inactive surface of catalyst. It was found that H₂ played a major role in the shapes and structures of CNTs.

Original language	English
Pages (from-to)	3559-3562
Number of pages	4
Journal	Materials Science Forum
Volume	475-479
Issue number	V
DOIs	https://doi.org/10.4028/0-87849-960-1.3559
State	Published - 2005
Event	PRICM 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing - Beijing, China Duration: 2 Nov 2004 → 5 Nov 2004

Keywords

Carbon Nanotubes (CNTs)
Gasification Reaction
H Gas
Synthesized Carbon

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10.4028/0-87849-960-1.3559

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title = "Effect of H2 gas on carbon nanotubes synthesis",

abstract = "The effect of H2 gas during the carbon nanotubes (CNTs) synthesis with CO-H2 gas mixture was investigated using by mass measurement, and scanning electron microscopy (SEM). The maximum weight and yield of the synthesized carbon (C) were obtained when the mixture ratio of H2:CO was 3:7 and 9:1, respectively. In case of 100\% carbon monoxide (CO) without hydrogen (H2) addition, the weight of carbon increased, but CNTs were not observed. The CNTs were formed when the contents of Ha reaches at least 10\%, and their structures became more distinct with an increase of H2 addition, and then the shapes of CNTs were more thin and straight. When the contents of H2 was 80\% (H2:CO = 8:2), the shapes and growth of CNTs showed an optimal condition. On the other hand, when the contents of H2 was higher than the critical value, the shapes of CNTs became worse due to transition into inactive surface of catalyst. It was found that H2 played a major role in the shapes and structures of CNTs.",

keywords = "Carbon Nanotubes (CNTs), Gasification Reaction, H Gas, Synthesized Carbon",

author = "Chung, \{U. C.\} and Lee, \{D. B.\} and Jeong, \{Y. U.\} and Ha, \{M. J.\} and Chung, \{W. S.\}",

year = "2005",

doi = "10.4028/0-87849-960-1.3559",

language = "English",

volume = "475-479",

pages = "3559--3562",

journal = "Materials Science Forum",

issn = "0255-5476",

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note = "PRICM 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing ; Conference date: 02-11-2004 Through 05-11-2004",

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TY - JOUR

T1 - Effect of H2 gas on carbon nanotubes synthesis

AU - Chung, U. C.

AU - Lee, D. B.

AU - Jeong, Y. U.

AU - Ha, M. J.

AU - Chung, W. S.

PY - 2005

Y1 - 2005

N2 - The effect of H2 gas during the carbon nanotubes (CNTs) synthesis with CO-H2 gas mixture was investigated using by mass measurement, and scanning electron microscopy (SEM). The maximum weight and yield of the synthesized carbon (C) were obtained when the mixture ratio of H2:CO was 3:7 and 9:1, respectively. In case of 100% carbon monoxide (CO) without hydrogen (H2) addition, the weight of carbon increased, but CNTs were not observed. The CNTs were formed when the contents of Ha reaches at least 10%, and their structures became more distinct with an increase of H2 addition, and then the shapes of CNTs were more thin and straight. When the contents of H2 was 80% (H2:CO = 8:2), the shapes and growth of CNTs showed an optimal condition. On the other hand, when the contents of H2 was higher than the critical value, the shapes of CNTs became worse due to transition into inactive surface of catalyst. It was found that H2 played a major role in the shapes and structures of CNTs.

AB - The effect of H2 gas during the carbon nanotubes (CNTs) synthesis with CO-H2 gas mixture was investigated using by mass measurement, and scanning electron microscopy (SEM). The maximum weight and yield of the synthesized carbon (C) were obtained when the mixture ratio of H2:CO was 3:7 and 9:1, respectively. In case of 100% carbon monoxide (CO) without hydrogen (H2) addition, the weight of carbon increased, but CNTs were not observed. The CNTs were formed when the contents of Ha reaches at least 10%, and their structures became more distinct with an increase of H2 addition, and then the shapes of CNTs were more thin and straight. When the contents of H2 was 80% (H2:CO = 8:2), the shapes and growth of CNTs showed an optimal condition. On the other hand, when the contents of H2 was higher than the critical value, the shapes of CNTs became worse due to transition into inactive surface of catalyst. It was found that H2 played a major role in the shapes and structures of CNTs.

KW - Carbon Nanotubes (CNTs)

KW - Gasification Reaction

KW - H Gas

KW - Synthesized Carbon

UR - https://www.scopus.com/pages/publications/17044380695

U2 - 10.4028/0-87849-960-1.3559

DO - 10.4028/0-87849-960-1.3559

M3 - Conference article

AN - SCOPUS:17044380695

SN - 0255-5476

VL - 475-479

SP - 3559

EP - 3562

JO - Materials Science Forum

JF - Materials Science Forum

IS - V

T2 - PRICM 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing

Y2 - 2 November 2004 through 5 November 2004

ER -

Effect of H₂ gas on carbon nanotubes synthesis

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