A New Member of the Graphene Family: Graphene Acid

Ondřej Jankovský; Michal Nováček; Jan Luxa; David Sedmidubský; Vlastimil Fila; Martin Pumera; Zdeněk Sofer

doi:10.1002/chem.201603766

A New Member of the Graphene Family: Graphene Acid

Ondřej Jankovský, Michal Nováček, Jan Luxa, David Sedmidubský, Vlastimil Fila, Martin Pumera, Zdeněk Sofer

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

A new member of the family of graphene derivatives, namely, graphene acid with a composition close to C₁(COOH)₁, was prepared by oxidation of graphene oxide. The synthetic procedure is based on repeated oxidation of graphite with potassium permanganate in an acidic environment. The oxidation process was studied in detail after each step. The multiple oxidations led to oxidative removal of other oxygen functional groups formed in the first oxidation step. Detailed chemical analysis showed only a minor amount of other oxygen-containing functional groups such as hydroxyl and the dominant presence of carboxyl groups in a concentration of about 30 wt %. Further oxidation led to complete decomposition of graphene acid. The obtained material exhibits unique sorption capacity towards metal ions and carbon dioxide. The highly hydrophilic nature of graphene acid allowed the assembly of ultrathin free-standing membranes with high transparency.

Original language	English
Pages (from-to)	17416-17424
Number of pages	9
Journal	Chemistry - A European Journal
Volume	22
Issue number	48
DOIs	https://doi.org/10.1002/chem.201603766
Publication status	Published - 2016 Nov 21

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© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

All Science Journal Classification (ASJC) codes

Catalysis
Organic Chemistry

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abstract = "A new member of the family of graphene derivatives, namely, graphene acid with a composition close to C1(COOH)1, was prepared by oxidation of graphene oxide. The synthetic procedure is based on repeated oxidation of graphite with potassium permanganate in an acidic environment. The oxidation process was studied in detail after each step. The multiple oxidations led to oxidative removal of other oxygen functional groups formed in the first oxidation step. Detailed chemical analysis showed only a minor amount of other oxygen-containing functional groups such as hydroxyl and the dominant presence of carboxyl groups in a concentration of about 30 wt %. Further oxidation led to complete decomposition of graphene acid. The obtained material exhibits unique sorption capacity towards metal ions and carbon dioxide. The highly hydrophilic nature of graphene acid allowed the assembly of ultrathin free-standing membranes with high transparency.",

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AU - Nováček, Michal

AU - Luxa, Jan

AU - Sedmidubský, David

AU - Fila, Vlastimil

AU - Pumera, Martin

AU - Sofer, Zdeněk

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A New Member of the Graphene Family: Graphene Acid

Abstract

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