TY - JOUR
T1 - Creation of 3-dimensional carbon nanostructures from UV irradiation of carbon dioxide at room temperature
AU - Aschenbrenner, Ortrud
AU - Fukuda, Takahiro
AU - Hasumura, Takashi
AU - Maekawa, Toru
AU - Gun'Ko, Vladimir M.
AU - Mikhalovsky, Sergey V.
AU - Cundy, Andrew B.
AU - Whitby, Raymond L.D.
N1 - Funding Information:
Funding by Michael Chowen is gratefully acknowledged. This work was supported by the European Commission under the EU FP7 Marie Curie Industry-Academia Partnerships and Pathways, GA 251429.
PY - 2012/12
Y1 - 2012/12
N2 - 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.
AB - 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.
KW - Carbon dioxide conversion
KW - Carbon nanomaterials
KW - Critical opalescence
KW - Photolysis
KW - Supercritical carbon dioxide
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U2 - 10.1016/j.supflu.2012.07.017
DO - 10.1016/j.supflu.2012.07.017
M3 - Article
AN - SCOPUS:84865825893
VL - 72
SP - 1
EP - 6
JO - Journal of Supercritical Fluids
JF - Journal of Supercritical Fluids
SN - 0896-8446
ER -