A simple method for graphene production based on exfoliation of graphite in water using 1-pyrenesulfonic acid sodium salt

作者：Yang H; Hernandez Y; Schlierf A; Felten A; Eckmann A; Johal S; Louette P; Pireaux J J; Feng X; Mueellen K; Palermo V; Casiraghi C^*

来源：Carbon, 2013, 53: 357-365.

DOI：10.1016/j.carbon.2012.11.022

In this work we use a chemical approach based on supra-molecular and non-covalent interactions between graphene and 1-pyrenesulfonic acid sodium salt (Py-1SO(3)) to obtain a stable dispersion of graphene by using only water as solvent. The material has been characterized by a combination of spectroscopic and microscopic techniques. In particular, an extensive Raman analysis shows that we have similar to 70% few-graphene layers (%26lt;7). We also show that the exfoliation efficiency strongly depends on the number of functional groups by comparing suspensions obtained by Py-1SO(3) and 1,3,6,8-pyrenetetrasulfonic acid (Py-4SO(3)). A strong decrease in the exfoliation yield has been observed by using pyrene with 4 sulphonic groups (Py-4SO(3)), as compared to one sulphonic group (Py-1SO(3)). Being completely water-based, these suspensions can be used as inks for printable tattoo-based electro-chemical sensors.

• 出版日期2013-3