Preparation of porous graphene from electrochemically and sonoelectrochemically exfoliated graphene

Porous graphene synergistically takes advantage of both graphene and porous materials, providing rich transfer channels for electrons/ions in many practical applications. In this study, porous graphene was prepared via a chemical etching reaction between graphene and hydrogen peroxide under hydrothe...

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Bibliographic Details
Published in:Bulletin of materials science 2023-12, Vol.46 (4), p.232, Article 232
Main Authors: Pishgahinejad, Sara, Hassanzadeh, Nafiseh
Format: Article
Language:English
Subjects:
Chemical etching
Chemistry and Materials Science
Electrodes
Electrolytes
Engineering
Exfoliation
Fragmentation
Graphene
Graphite
Hydrogen peroxide
Materials Science
Morphology
Multilayers
Pore formation
Porous materials
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Summary:Porous graphene synergistically takes advantage of both graphene and porous materials, providing rich transfer channels for electrons/ions in many practical applications. In this study, porous graphene was prepared via a chemical etching reaction between graphene and hydrogen peroxide under hydrothermal conditions. Although graphene oxide is mainly used as the starting material for preparing porous graphene, the rapidly and eco-friendly prepared electrochemically exfoliated graphene (EEG) was used, which is desirable for large-scale production of porous graphene. Furthermore, the effect of applying ultrasonic during the electrochemical exfoliation was systematically investigated. Morphological studies revealed that applying ultrasonic during exfoliation would result in the fragmentation of graphene sheets into small pieces, which could be favourable for some applications. After the hydrothermal process, despite the restacking of graphene sheets, the formation of pores showed a dominant effect and increased the specific surface area from 8.67 to 30.08 m 2 g −1 . Besides, the aforementioned fragmentation of graphene sheets (under ultrasonic waves) resulted in the severe restacking of graphene sheets after the pore formation process, which is not desirable. Consequently, sonoelectrochemical exfoliation could be significantly beneficial for producing multilayer graphene, but not desirable for producing porous graphene. Graphical Abstract
ISSN:0973-7669
0250-4707
0973-7669
DOI:10.1007/s12034-023-03078-z