Effects of ammonia on microstructure and graphitic degree of carbon nanotubes prepared by CVD method

Wanliang Mi; Jerry Lin; Yongdan Li; Baoquan Zhang

Effects of ammonia on microstructure and graphitic degree of carbon nanotubes prepared by CVD method

Wanliang Mi, Jerry Lin, Yongdan Li, Baoquan Zhang

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Vertically aligned carbon nanotubes (CNTs) was prepared on porous Al₂O₃ substrate by the CVD method with ferrocene as catalyst precursor, acetylene as carbon source and NH₃, N₂ as carrier gases. Raman spectrum, scanning electron microscope (SEM), high-resolution electron microscope (HRTEM), X-ray diffraction (XRD) and elemental analysis were employed to characterize the materials. Experiment results showed that CNTs grown in NH₃ were bamboo-shaped structure at 800°C, containing about 3.46% (mass) N element and had a space between graphitic layers about 0.384 nm. Moreover, Fe₃C and Fe₂N or Fe₃N compound were detected in the carbon product. Catalyst surface property changed as a result of the NH₃ adsorption in Fe catalyst and adulteration of N in the CNTs made the CNTs show some crystal distortion and a low graphitic degree. CNTs diameter increased with reaction temperature.

Original language	English (US)
Pages (from-to)	964-969
Number of pages	6
Journal	Huagong Xuebao/Journal of Chemical Industry and Engineering (China)
Volume	57
Issue number	4
State	Published - Apr 1 2006

Keywords

Acetylene
Adulteration
Bamboo-shaped structure
Carbon nanotube
FeC
Graphitic degree
NH
Porous substrate

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)

Cite this

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title = "Effects of ammonia on microstructure and graphitic degree of carbon nanotubes prepared by CVD method",

abstract = "Vertically aligned carbon nanotubes (CNTs) was prepared on porous Al2O3 substrate by the CVD method with ferrocene as catalyst precursor, acetylene as carbon source and NH3, N2 as carrier gases. Raman spectrum, scanning electron microscope (SEM), high-resolution electron microscope (HRTEM), X-ray diffraction (XRD) and elemental analysis were employed to characterize the materials. Experiment results showed that CNTs grown in NH3 were bamboo-shaped structure at 800°C, containing about 3.46% (mass) N element and had a space between graphitic layers about 0.384 nm. Moreover, Fe3C and Fe2N or Fe3N compound were detected in the carbon product. Catalyst surface property changed as a result of the NH3 adsorption in Fe catalyst and adulteration of N in the CNTs made the CNTs show some crystal distortion and a low graphitic degree. CNTs diameter increased with reaction temperature.",

keywords = "Acetylene, Adulteration, Bamboo-shaped structure, Carbon nanotube, FeC, Graphitic degree, NH, Porous substrate",

author = "Wanliang Mi and Jerry Lin and Yongdan Li and Baoquan Zhang",

year = "2006",

month = apr,

day = "1",

language = "English (US)",

volume = "57",

pages = "964--969",

journal = "Huagong Xuebao/Journal of Chemical Industry and Engineering (China)",

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T1 - Effects of ammonia on microstructure and graphitic degree of carbon nanotubes prepared by CVD method

AU - Mi, Wanliang

AU - Lin, Jerry

AU - Li, Yongdan

AU - Zhang, Baoquan

PY - 2006/4/1

Y1 - 2006/4/1

N2 - Vertically aligned carbon nanotubes (CNTs) was prepared on porous Al2O3 substrate by the CVD method with ferrocene as catalyst precursor, acetylene as carbon source and NH3, N2 as carrier gases. Raman spectrum, scanning electron microscope (SEM), high-resolution electron microscope (HRTEM), X-ray diffraction (XRD) and elemental analysis were employed to characterize the materials. Experiment results showed that CNTs grown in NH3 were bamboo-shaped structure at 800°C, containing about 3.46% (mass) N element and had a space between graphitic layers about 0.384 nm. Moreover, Fe3C and Fe2N or Fe3N compound were detected in the carbon product. Catalyst surface property changed as a result of the NH3 adsorption in Fe catalyst and adulteration of N in the CNTs made the CNTs show some crystal distortion and a low graphitic degree. CNTs diameter increased with reaction temperature.

AB - Vertically aligned carbon nanotubes (CNTs) was prepared on porous Al2O3 substrate by the CVD method with ferrocene as catalyst precursor, acetylene as carbon source and NH3, N2 as carrier gases. Raman spectrum, scanning electron microscope (SEM), high-resolution electron microscope (HRTEM), X-ray diffraction (XRD) and elemental analysis were employed to characterize the materials. Experiment results showed that CNTs grown in NH3 were bamboo-shaped structure at 800°C, containing about 3.46% (mass) N element and had a space between graphitic layers about 0.384 nm. Moreover, Fe3C and Fe2N or Fe3N compound were detected in the carbon product. Catalyst surface property changed as a result of the NH3 adsorption in Fe catalyst and adulteration of N in the CNTs made the CNTs show some crystal distortion and a low graphitic degree. CNTs diameter increased with reaction temperature.

KW - Acetylene

KW - Adulteration

KW - Bamboo-shaped structure

KW - Carbon nanotube

KW - FeC

KW - Graphitic degree

KW - NH

KW - Porous substrate

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AN - SCOPUS:33745292417

SN - 0438-1157

VL - 57

SP - 964

EP - 969

JO - Huagong Xuebao/Journal of Chemical Industry and Engineering (China)

JF - Huagong Xuebao/Journal of Chemical Industry and Engineering (China)

IS - 4

ER -

Effects of ammonia on microstructure and graphitic degree of carbon nanotubes prepared by CVD method

Abstract

Keywords

ASJC Scopus subject areas

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