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Purity-controllable growth of bamboo-like multi-walled carbon nanotubes over copper-based catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
51031 46826 2013 4 PDF Available
Title
Purity-controllable growth of bamboo-like multi-walled carbon nanotubes over copper-based catalysts
Abstract

The growth of bamboo-like multi-walled carbon nanotubes (CNTs) without the formation of amorphous carbons was performed using copper-based catalysts by catalytic chemical vapour deposition (CVD) with diluted ethylene at 700–900 °C. The as-grown CNT soot was characterised by transmission electron microscopy, thermogravimetric analysis and Raman spectroscopy. The weak metal–support interaction of a sulphate-assisted copper catalyst (CuSO4/SiO2) can provide high-purity growth with remarkable yields of CNTs (2.24–6.10 CNT/g Cu·h) at 850–900 °C. Additionally, hydrogen-assisted CVD can activate inert copper catalysts, e.g., Cu(NO3)2/SiO2 or Cu(CH3COO)2/SiO2, for the growth of CNTs.

► We report a method to grow carbon nanotubes without the formation of amorphous carbons. ► Weak metal–support interaction of sulphate-assisted copper catalysts can improve the growth quality of CNTs. ► The CNT growth yields will significantly increase at 800–900 °C. ► Hydrogen-assisted CVD can activate inner copper catalysts for the CNT growth.

Keywords
Purity-controllable; Bamboo-like; Carbon nanotubes; Copper catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 34, 5 April 2013, Pages 41–44
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us