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Issue 6, 2018
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Anode coverage for enhanced electrochemical oxidation: a green and efficient strategy towards water-dispersible graphene†

Hui Shan Wang,ab   Su Yun Tian,abc   Si Wei Yang, ORCID logo ab   Gang Wang, ORCID logo d   Xiao Fei You, ORCID logo ab   Li Xuan Xu,ab   Qing Tian Li,ab   Peng He, ORCID logo *ab   Gu Qiao Ding, ORCID logo *ab   Zhi Liuabc  and  Xiao Ming Xieabc  
Author affiliations

* Corresponding authors

a Center for Excellence in Superconducting Electronics, State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, P. R. China
E-mail: hepeng@mail.sim.ac.cn, gqding@mail.sim.ac.cn

b University of Chinese Academy of Sciences, Beijing 100049, P. R. China

c School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, P. R. China

d Department of Microelectronic Science and Engineering, Faculty of Science, Ningbo University, Ningbo 315211, P. R. China

Abstract

The synthesis of water-dispersible graphene (W-Gr) is essential for both laboratory-scale studies and practical applications. Herein, we report a green electrochemical route followed by post-sonication to prepare few-layered W-Gr of 1–6 atomic layers in thickness and 1.0–7.0 μm2 in area with a remarkably high yield (87.3%). Both outstanding dispersibility (8.2 mg mL−1) and good stability (at least 6 months) are achieved in water. Mechanism analysis indicates the critical effect of terephthalic acid coverage on the anode for adequate electrochemical oxidation, which is the prerequisite for subsequent bubble- and sonication-exfoliation. This partial anode coverage strategy provides a new possibility of a simple electrochemical setup to greenly and scalably fabricate graphene with specific functionality.

Graphical abstract: Anode coverage for enhanced electrochemical oxidation: a green and efficient strategy towards water-dispersible graphene

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Supplementary files

Article information

https://doi.org/10.1039/C7GC03345A
Submitted
06 Nov 2017
Accepted
08 Feb 2018
First published
08 Feb 2018
Green Chem., 2018,20, 1306-1315
Article type
Paper
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Anode coverage for enhanced electrochemical oxidation: a green and efficient strategy towards water-dispersible graphene

H. S. Wang, S. Y. Tian, S. W. Yang, G. Wang, X. F. You, L. X. Xu, Q. T. Li, P. He, G. Q. Ding, Z. Liu and X. M. Xie, Green Chem., 2018, 20, 1306
DOI: 10.1039/C7GC03345A

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