Highly oxidized graphene oxide and methods for production...

C - Chemistry – Metallurgy – 01 – B

Patent

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C01B 31/04 (2006.01) C01B 13/32 (2006.01) C01B 31/00 (2006.01) C08F 301/00 (2006.01) D01F 9/12 (2006.01)

Patent

CA 2762430

A highly oxidized form of graphene oxide and methods for production thereof are described in various embodiments of the present disclosure. In general, the methods include mixing a graphite source with a solution containing at least one oxidant and at least one protecting agent and then oxidizing the graphite source with the at least one oxidant in the presence of the at least one protecting agent to form the graphene oxide. Graphene oxide synthesized by the presently described methods is of a high structural quality that is more oxidized and maintains a higher proportion of aromatic rings and aromatic domains than does graphene oxide prepared in the absence of at least one protecting agent. Methods for reduction of graphene oxide into chemically converted graphene are also disclosed herein. The chemically converted graphene of the present disclosure is significantly more electrically conductive than is chemically converted graphene prepared from other sources of graphene oxide.

La présente invention concerne conformément à divers modes de réalisation une forme hautement oxydée d'oxyde de graphène et des procédés permettant de les fabriquer. D'une manière générale, les procédés comprennent les opérations consistant à mélanger une source de graphite avec une solution contenant au moins un oxydant et au moins un agent protecteur, puis à oxyder la source de graphite par le ou les oxydants en présence du ou des agents protecteurs pour former l'oxyde de graphène. L'oxyde de graphène synthétisé par les procédés présentement décrits est d'une haute qualité structurale qui est davantage oxydée et conserve une proportion plus élevée de noyaux aromatiques et de domaines aromatiques que ne le fait l'oxyde de graphène préparé en l'absence d'au moins un agent protecteur. La présente invention porte également sur des procédés de réduction de l'oxyde de graphène en graphène chimiquement converti. Le graphène chimiquement converti de la présente invention est significativement plus électroconducteur que le graphène chimiquement converti qui est préparé à partir d'autres sources d'oxyde de graphène.

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