2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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Clean Technology 2008

Controlled Purification, Solubilisation, Dispersion and Cutting of Carbon Nanotubes using Phosphomolybdic Acid

C. Warakulwit, J. Majimel, M.-H. Delville, P. Garrigue, J. Limtrakul, A. Kuhn
Kasetsart University, TH

Keywords:
carbon nanotubes, purification, solubilization, dispersion, polyoxometalate, adsorption

Abstract:
In this work we describe a straight forward procedure that allows an easy purification, an efficient solubilization and, if desired, a controlled cutting of carbon nanotubes. Sonication in aqueous solutions of phosphomolybdic acid, that previously has been used to prepare stable suspensions of carbon nanoparticles or graphene sheets and to solubilize carbon nanotubes, leads to the adsorption of phosphomolybdate on the nanotube walls. This method generates a negative surface charge that allows the formation of very stable suspensions. Prolonged treatment results in a controlled shortening of the tubes. Because of its ability to purify, water-solubilize, disperse and shorten CNTs using a single experimental approach, this combined technique is considered to be an important step forward for many applications using carbon nanotubes.


Nanotech 2008 Conference Program Abstract