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

Abstract:

: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.

journal_name

Nat Commun

journal_title

Nature communications

authors

Vecera P,Holzwarth J,Edelthalhammer KF,Mundloch U,Peterlik H,Hauke F,Hirsch A

doi

10.1038/ncomms12411

subject

Has Abstract

pub_date

2016-08-10 00:00:00

pages

12411

issn

2041-1723

pii

ncomms12411

journal_volume

7

pub_type

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