Improved ozonolysis of carbon nanotubes

C - Chemistry – Metallurgy – 01 – B

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C01B 31/00 (2006.01) C07C 27/06 (2006.01)

Patent

CA 2584433

Methods of treating single walled and multiwalled carbon nanotubes with ozone are provided. The carbon nanotubes are treated by contacting the carbon nanotubes with ozone at a temperature range between 0~C and 100~C to yield functionalized nanotubes which are greater in weight than the untreated carbon nonotubes. The carbon nonotubes treated according to methods of the invention can be used to prepare complex structures such as three dimensional networks or rigid porous structures which can be utilized to form electordes for fabrication of improved electrochemical capacitors. Useful catalyst supports are prepared by contacting carbon nanotube structures such as carbon nanotube aggregates, three dimensional network or rigid porous structures with ozone in the temperature range between 0~C and 100~C.

L'invention concerne des procédés de traitement de nanotubes de carbone à paroi unique et à multiparoi. Les nanotubes de carbone sont traités en les mettant en contact avec l'ozone, dans une plage de température s'étendant entre 0 °C et 100 °C pour fournir des nanotubes fonctionnalisés qui sont d'un plus grand poids que les nanotubes de carbone non traités. Les nanotubes de carbone traités conformément aux procédés de l'invention peuvent être utilisés pour préparer des structures complexes, telles que des structures à réseaux tridimensionnels ou des structures poreuses rigides qui peuvent être utilisées pour former des électrodes destinées à la fabrication de condensateurs électrochimiques améliorés. Des supports de catalyseurs utiles sont préparés par mise en contact des structures de nanotubes de carbone, telles que des agrégats de nanotubes de carbone, des structures à réseaux tridimensionnels ou des structures poreuses rigides, avec l'ozone, dans une plage de température s'étendant entre 0 °C et 100 °C.

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