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Investigating the Influence of Oxygen/Carbon Ratio on Fabrication of Composite Carbon Nanotubes by Self-Assembly Surface Treatment

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Abstract:

Through self-assembly monolayer surface treatment, metal oxide nanoparticles uniformly dispersed onto carbon nanotubes (CNTs) surface are investigated. At first, oxidation treatment was performed to increase O/C ratio of CNTs surface at 250°C for 1 hr under an oxygen atmosphere. X-ray photoelectron spectroscopy (XPS) analysis shows that O/C ratio is a increasing function of oxidating time. Distribution of oxygen functional groups on CNTs surface, i.e., carboxyl, carbonyl, phenolic groups, can be identified and deconvoluted by a symmetrical Gauss function. Experiments indicate that heat time for 5hr can produce a greater O/C ratio on CNTs surface. It is observed that carboxyl groups acts an important role to link with metal ions via an ionic interaction, thus, forming a monolayer adsorption on CNTs surface. By heating the treated CNTs, a completely composite nanostructure is thus formed. In the present work, we successfully fabricate three kinds of nanoparticles including SnO2, and RuO2, with an average diameter of 5-10 nm coated on the CNTs.

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Periodical:

Solid State Phenomena (Volumes 121-123)

Pages:

407-412

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.121-123.407

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Online since:

March 2007

Authors:

Heng Yi Su, Chien Te Hsieh, Jin Ming Chen, Han Chang Shih

Keywords:

Carbon Nanotube (CN), Oxygen/Carbo Ratio, Self-Assembly

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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