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Creation of 3-dimensional carbon nanostructures from UV irradiation of carbon dioxide at room temperature

Creation of 3-dimensional carbon nanostructures from UV irradiation of carbon dioxide at room temperature
Creation of 3-dimensional carbon nanostructures from UV irradiation of carbon dioxide at room temperature
A method is presented for the production of carbon nanomaterials from carbon dioxide in a low temperature process. In this method, carbon dioxide is irradiated with an ultraviolet laser at the conditions of critical opalescence where light is scattered and absorbed. Spherical carbon nanoparticles are obtained under these conditions on metal substrates without any additional catalyst near room temperature. The particles are of approximately uniform shape and size of around 100 nm. Some of the particles form clusters. The method is reproducible on different substrates. Quantum chemical calculations have been employed in order to elucidate the role of critical opalescence and of the substrate. The calculations show that the presence of molecular clusters at the critical point is essential in decreasing the excitation energy. The dissociation reaction most likely occurs on the surface of the substrate, where the excitation energy is decreased even further.
Carbon nanomaterials, Supercritical carbon dioxide, Critical opalescence, Photolysis, Carbon dioxide conversion
0896-8446
1-6
Aschenbrenner, Ortrud
ce755498-5199-4ec2-a817-61c3dae08182
Fukuda, Takahiro
b275a3a4-5788-46c1-bc91-10f76c9f2a96
Hasumura, Takashi
7ad1bc3e-021b-4b95-be0e-6f04467a1a19
Maekawa, Toru
c1a7a2df-a8fe-4317-b637-484aeadbafba
Gun’ko, Vladimir M.
9c0dc083-30e6-4729-9bb5-e3a1b66ab0d8
Mikhalovsky, Sergey V.
069cc234-fe97-4055-97ed-5bec73bf8d0d
Cundy, Andrew B.
994fdc96-2dce-40f4-b74b-dc638286eb08
Whitby, Raymond L.D.
aafe509a-7755-4843-8255-cf80f0b702ac
Aschenbrenner, Ortrud
ce755498-5199-4ec2-a817-61c3dae08182
Fukuda, Takahiro
b275a3a4-5788-46c1-bc91-10f76c9f2a96
Hasumura, Takashi
7ad1bc3e-021b-4b95-be0e-6f04467a1a19
Maekawa, Toru
c1a7a2df-a8fe-4317-b637-484aeadbafba
Gun’ko, Vladimir M.
9c0dc083-30e6-4729-9bb5-e3a1b66ab0d8
Mikhalovsky, Sergey V.
069cc234-fe97-4055-97ed-5bec73bf8d0d
Cundy, Andrew B.
994fdc96-2dce-40f4-b74b-dc638286eb08
Whitby, Raymond L.D.
aafe509a-7755-4843-8255-cf80f0b702ac

Aschenbrenner, Ortrud, Fukuda, Takahiro, Hasumura, Takashi, Maekawa, Toru, Gun’ko, Vladimir M., Mikhalovsky, Sergey V., Cundy, Andrew B. and Whitby, Raymond L.D. (2012) Creation of 3-dimensional carbon nanostructures from UV irradiation of carbon dioxide at room temperature. The Journal of Supercritical Fluids, 72, 1-6.

Record type: Article

Abstract

A method is presented for the production of carbon nanomaterials from carbon dioxide in a low temperature process. In this method, carbon dioxide is irradiated with an ultraviolet laser at the conditions of critical opalescence where light is scattered and absorbed. Spherical carbon nanoparticles are obtained under these conditions on metal substrates without any additional catalyst near room temperature. The particles are of approximately uniform shape and size of around 100 nm. Some of the particles form clusters. The method is reproducible on different substrates. Quantum chemical calculations have been employed in order to elucidate the role of critical opalescence and of the substrate. The calculations show that the presence of molecular clusters at the critical point is essential in decreasing the excitation energy. The dissociation reaction most likely occurs on the surface of the substrate, where the excitation energy is decreased even further.

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More information

Published date: December 2012
Keywords: Carbon nanomaterials, Supercritical carbon dioxide, Critical opalescence, Photolysis, Carbon dioxide conversion
Organisations: Geochemistry

Identifiers

Local EPrints ID: 399291
URI: https://eprints.soton.ac.uk/id/eprint/399291
ISSN: 0896-8446
PURE UUID: 7c64070c-a27d-46ba-8ac7-15e7f9ed7569
ORCID for Andrew B. Cundy: ORCID iD orcid.org/0000-0003-4368-2569

Catalogue record

Date deposited: 10 Aug 2016 15:23
Last modified: 06 Jun 2018 12:21

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Contributors

Author: Ortrud Aschenbrenner
Author: Takahiro Fukuda
Author: Takashi Hasumura
Author: Toru Maekawa
Author: Vladimir M. Gun’ko
Author: Sergey V. Mikhalovsky
Author: Andrew B. Cundy ORCID iD
Author: Raymond L.D. Whitby

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