Assisted Tip Sonication Approach for Graphene Synthesis in Aqueous Dispersion

Graphene (G) is a newcomer material that holds promising properties for many applications. The production of high quality G with a good yield is a long-standing goal for many researchers. This work emphasizes synthesis of dispersed graphene nanoplatelets (DGP) through aqueous dispersion technique in...

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Main Authors: Ahmed F. Ghanem, Mona H. Abdel Rehim
Format: Article
Language:English
Published: MDPI AG 2018-05-01
Series:Biomedicines
Subjects:
Online Access:http://www.mdpi.com/2227-9059/6/2/63
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spelling doaj-e7fbee145d154bd7bb0358e785604bf82020-11-24T21:35:58ZengMDPI AGBiomedicines2227-90592018-05-01626310.3390/biomedicines6020063biomedicines6020063Assisted Tip Sonication Approach for Graphene Synthesis in Aqueous DispersionAhmed F. Ghanem0Mona H. Abdel Rehim1Packaging Materials Department, National Research Centre, Elbehoth Street 33, Dokki, Cairo 12622, EgyptPackaging Materials Department, National Research Centre, Elbehoth Street 33, Dokki, Cairo 12622, EgyptGraphene (G) is a newcomer material that holds promising properties for many applications. The production of high quality G with a good yield is a long-standing goal for many researchers. This work emphasizes synthesis of dispersed graphene nanoplatelets (DGP) through aqueous dispersion technique in surfactant/water solution with the aid of tip sonication. A chemical method was also used to prepare graphene oxide (GO) and reduced graphene oxide (RGO) for comparison. Elemental analysis revealed the C:O ratio to be 12:1 for DGP but much lower for other graphene structures. Optical characterization of DGP, GO and RGO with UV and Raman spectroscopy confirmed the ideal structure of DGP. Moreover, X-ray diffraction (XRD) revealed the amorphous structure of DGP. Transmission electron microscope (TEM) imaging showed that DGP was composed of a few flat layers, unlike the wrinkled and partially bent multilayered G. Topological study of the DGP surface with scanning electron microscope (SEM) depicted its rough surface with (ra) value of 35 nm, as revealed using an atomic force microscope (AFM). Electrochemical measurements confirmed the higher conductivity of DGP over graphene prepared by chemical method due to lack of structural defects. Its perfect structure facilitates the mobility of charge carriers that makes it preferable in optoelectronic applications.http://www.mdpi.com/2227-9059/6/2/63graphenechemical methodliquid dispersion approachelectrical conductivity
collection DOAJ
language English
format Article
sources DOAJ
author Ahmed F. Ghanem
Mona H. Abdel Rehim
spellingShingle Ahmed F. Ghanem
Mona H. Abdel Rehim
Assisted Tip Sonication Approach for Graphene Synthesis in Aqueous Dispersion
Biomedicines
graphene
chemical method
liquid dispersion approach
electrical conductivity
author_facet Ahmed F. Ghanem
Mona H. Abdel Rehim
author_sort Ahmed F. Ghanem
title Assisted Tip Sonication Approach for Graphene Synthesis in Aqueous Dispersion
title_short Assisted Tip Sonication Approach for Graphene Synthesis in Aqueous Dispersion
title_full Assisted Tip Sonication Approach for Graphene Synthesis in Aqueous Dispersion
title_fullStr Assisted Tip Sonication Approach for Graphene Synthesis in Aqueous Dispersion
title_full_unstemmed Assisted Tip Sonication Approach for Graphene Synthesis in Aqueous Dispersion
title_sort assisted tip sonication approach for graphene synthesis in aqueous dispersion
publisher MDPI AG
series Biomedicines
issn 2227-9059
publishDate 2018-05-01
description Graphene (G) is a newcomer material that holds promising properties for many applications. The production of high quality G with a good yield is a long-standing goal for many researchers. This work emphasizes synthesis of dispersed graphene nanoplatelets (DGP) through aqueous dispersion technique in surfactant/water solution with the aid of tip sonication. A chemical method was also used to prepare graphene oxide (GO) and reduced graphene oxide (RGO) for comparison. Elemental analysis revealed the C:O ratio to be 12:1 for DGP but much lower for other graphene structures. Optical characterization of DGP, GO and RGO with UV and Raman spectroscopy confirmed the ideal structure of DGP. Moreover, X-ray diffraction (XRD) revealed the amorphous structure of DGP. Transmission electron microscope (TEM) imaging showed that DGP was composed of a few flat layers, unlike the wrinkled and partially bent multilayered G. Topological study of the DGP surface with scanning electron microscope (SEM) depicted its rough surface with (ra) value of 35 nm, as revealed using an atomic force microscope (AFM). Electrochemical measurements confirmed the higher conductivity of DGP over graphene prepared by chemical method due to lack of structural defects. Its perfect structure facilitates the mobility of charge carriers that makes it preferable in optoelectronic applications.
topic graphene
chemical method
liquid dispersion approach
electrical conductivity
url http://www.mdpi.com/2227-9059/6/2/63
work_keys_str_mv AT ahmedfghanem assistedtipsonicationapproachforgraphenesynthesisinaqueousdispersion
AT monahabdelrehim assistedtipsonicationapproachforgraphenesynthesisinaqueousdispersion
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