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Catalytic unzipping of carbon nanotubes to few-layer graphene sheets under microwaves irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
42381 45923 2009 9 PDF Available
Title
Catalytic unzipping of carbon nanotubes to few-layer graphene sheets under microwaves irradiation
Abstract

Catalytic unzipping of single-, double-, and multi-walled carbon nanotubes (SWNTs, DWNTs, and MWNTs), in the presence of Pd nanoparticles and an oxygen-containing liquid medium, to yield the few-layer graphene sheets, was performed under microwaves irradiation. In this unzipping process, the palladium particles act as a pair of scissors to cut the nanotube lengthways. Theoretical simulations with Reactive Forcefields confirm that the presence of Pd nanocatalysts and oxygen next to vacancies facilitate the unzipping process to form graphene from nanotube by significantly lowering the corresponding energy barrier. This synthesis method makes a link between nanotubes and graphene sheets, yielding a significant amount of graphene (between 4 and 8 wt.% with respect to the starting carbon material). Compared to previous methods, scaling-up can easily be achieved by increasing the number of synthesis reactors, leading to gram-amounts of graphene.

Graphical abstractCatalytic unzipping of single-, double-, and multi-walled carbon nanotubes (SWNTs, DWNTs, and MWNTs) in the presence of Pd nanoparticles and an oxygen-containing liquid medium was performed under microwaves irradiation. In this unzipping process, the palladium particles act as a pair of scissors to cut nanotubes lengthways. This synthesis method makes a link between nanotubes and graphene sheets, yielding a significant amount of graphene.Figure optionsDownload full-size imageDownload high-quality image (131 K)Download as PowerPoint slide

Keywords
Graphene; Carbon nanotubes; Catalysis; Microwaves; TEM
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Catalytic unzipping of carbon nanotubes to few-layer graphene sheets under microwaves irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 371, Issues 1–2, 15 December 2009, Pages 22–30
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
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