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Facile method to prepare magnetic multi-walled carbon nanotubes by in situ co-precipitation route

An effective method for preparing magnetic multi-walled carbon nanotubes (M-MWCNTs) was proposed by employing an in situ co-precipitation of ammonium ferrous sulfate hexahydrate and ammonium ferric sulfate dodecahydrate in a suspension of commercial MWCNTs. Microscopic and spectroscopic analyses cou...

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Bibliographic Details
Published in:Journal of industrial and engineering chemistry (Seoul, Korea) 2012, 18(5), , pp.1568-1571
Main Authors: Sowichai, Kanokwan, Supothina, Sitthisuntorn, Nimittrakoolchai, On-uma, Seto, Takafumi, Otani, Yoshio, Charinpanitkul, Tawatchai
Format: Article
Language:English
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Summary:An effective method for preparing magnetic multi-walled carbon nanotubes (M-MWCNTs) was proposed by employing an in situ co-precipitation of ammonium ferrous sulfate hexahydrate and ammonium ferric sulfate dodecahydrate in a suspension of commercial MWCNTs. Microscopic and spectroscopic analyses could confirm the presence of magnetite, maghemite and hematite on the surface of M-MWCNTs. Negative charges on the surfaces of acid-treated MWCNTs would lead to the attachment of iron derivatives which possessed positive charge due to electrostatic attraction. As a result, the prepared M-MWCNTs were clearly responsive to a permanent magnetic while the pristine MWCNTs were not.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2012.04.016