Tuning of graphene oxide composition by multiple oxidations for carbon dioxide storage and capture of toxic metals

0474933 - ÚOCHB 2018 RIV GB eng J - Journal Article
Nováček, M. - Jankovský, O. - Luxa, J. - Sedmidubský, D. - Pumera, M. - Fíla, V. - Lhotka, M. - Klímová, K. - Matějková, Stanislava - Sofer, Z.
Tuning of graphene oxide composition by multiple oxidations for carbon dioxide storage and capture of toxic metals.
Journal of Materials Chemistry A. Roč. 5, č. 6 (2017), s. 2739-2748. ISSN 2050-7488. E-ISSN 2050-7496
R&D Projects: GA ČR(CZ) GA15-09001S
Institutional support: RVO:61388963
Keywords : graphite oxide * thermal reduction * aqueous solution
OECD category: Inorganic and nuclear chemistry
Impact factor: 9.931, year: 2017
http://pubs.rsc.org/en/content/articlehtml/1952/ta/c6ta03631g

Graphene oxide (GO) is a material used as a precursor for the synthesis of graphene and its derivatives. Chemical properties of graphene are strongly influenced by the chemical composition of the original GO. In this paper we would like to show that the amount as well as the type of functional groups can be significantly increased and controlled by multiple oxidations of GO. For this purpose we performed multiple oxidations using two chlorate methods (Staudenmaier and Hofmann) and a permanganate method (Hummers). The results show a possibility of tuning the composition of GO functionalities by multiple oxidations. The obtained results also show that the second and third subsequent reoxidation reactions significantly increase the amount of oxygen containing groups in GO, mainly carboxylic groups. The multiple oxidation of graphene oxide led to a significant increase of carbon storage capacity. The high concentration of oxygen functionalities led to an increase of sorption capacity by more than one order of magnitude.
Permanent Link: http://hdl.handle.net/11104/0271832