Solvent-driven electron trapping and mass transport in reduced graphites to access perfect graphene

Autor(en)

Philipp Vecera, Johannes Holzwarth, Konstantin F. Edelthalhammer, Udo Mundloch, Herwig Peterlik, Frank Hauke, Andreas Hirsch

Abstrakt

Herein, we report on a significant discovery, namely, the quantitative discharging of reduced graphite forms, such as graphite intercalation compounds, graphenide dispersions and graphenides deposited on surfaces with the simple solvent benzonitrile. Because of its comparatively low reduction potential, benzonitrile is reduced during this process to the radical anion, which exhibits a red colour and serves as a reporter molecule for the quantitative determination of negative charges on the carbon sheets. Moreover, this discovery reveals a very fundamental physical-chemical phenomenon, namely a quantitative solvent reduction induced and electrostatically driven mass transport of K+ ions from the graphite intercalation compounds into the liquid. The simple treatment of dispersed graphenides suspended on silica substrates with benzonitrile leads to the clean conversion to graphene. This unprecedented procedure represents a rather mild, scalable and inexpensive method for graphene production surpassing previous wet-chemical approaches

Organisation(en)

Dynamik Kondensierter Systeme

Externe Organisation(en)

Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)

Journal

Nature Communications

Band

7

Anzahl der Seiten

7

ISSN

2041-1723

DOI

https://doi.org/10.1038/ncomms12411

Publikationsdatum

08-2016

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103009 Festkörperphysik

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie, Allgemeine Chemie, Allgemeine Biochemie, Genetik und Molekularbiologie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/6a7180a7-3ea2-4d66-b128-cf9233200351