Microwave-assisted exfoliation and tearing of graphene oxide in the presence of TiO2 nanoparticles

In this paper, we present a facile approach to reduce, exfoliate, and tear graphene oxide (GO) sheets, which can be used to produce graphene quantum dots. The prepared GO sheets were easily exfoliated and teared under UV and microwave (MW) irradiation in the presence of TiO2 nanoparticles (NPs). Res...

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Main Authors: Hadi Rasuli, Reza Rasuli, Mahdi Alizadeh, Goh BoonTong
Format: Article
Language:English
Published: Elsevier 2020-09-01
Series:Results in Physics
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2211379720316673
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author Hadi Rasuli
Reza Rasuli
Mahdi Alizadeh
Goh BoonTong
author_facet Hadi Rasuli
Reza Rasuli
Mahdi Alizadeh
Goh BoonTong
author_sort Hadi Rasuli
collection DOAJ
description In this paper, we present a facile approach to reduce, exfoliate, and tear graphene oxide (GO) sheets, which can be used to produce graphene quantum dots. The prepared GO sheets were easily exfoliated and teared under UV and microwave (MW) irradiation in the presence of TiO2 nanoparticles (NPs). Results show that the GO sheets can be reduced/fragments by MW depending on the irradiation power. We found that; GO sheets are partially reduced under MW irradiation with a power of 90 W and crushed to nanosheets by increasing the MW power up to 450 W. In addition, the photoluminescence peak is broadened, confirming a decrease in the size of GO sheets. The optical bandgap of the nanosheets was measured about 3 eV in agreement with the results of the tight-binding calculation. In addition, HR-TEM results show the size of prepared nanosheets is about 20 nm, while X-ray photoelectron spectroscopy shows a bond formation between residual TiO2 NPs and the prepared nanosheets.
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spelling doaj.art-faf6a9387c054f35942a149b5fae0e712022-12-22T00:28:01ZengElsevierResults in Physics2211-37972020-09-0118103200Microwave-assisted exfoliation and tearing of graphene oxide in the presence of TiO2 nanoparticlesHadi Rasuli0Reza Rasuli1Mahdi Alizadeh2Goh BoonTong3Department of Physics, Faculty of Science, University of Zanjan, Zanjan, IranDepartment of Physics, Faculty of Science, University of Zanjan, Zanjan, IranDepartment of Physics, Faculty of Science, University of Zanjan, Zanjan, IranLow Dimensional Materials Research Centre (LDMRC), Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia; Corresponding author.In this paper, we present a facile approach to reduce, exfoliate, and tear graphene oxide (GO) sheets, which can be used to produce graphene quantum dots. The prepared GO sheets were easily exfoliated and teared under UV and microwave (MW) irradiation in the presence of TiO2 nanoparticles (NPs). Results show that the GO sheets can be reduced/fragments by MW depending on the irradiation power. We found that; GO sheets are partially reduced under MW irradiation with a power of 90 W and crushed to nanosheets by increasing the MW power up to 450 W. In addition, the photoluminescence peak is broadened, confirming a decrease in the size of GO sheets. The optical bandgap of the nanosheets was measured about 3 eV in agreement with the results of the tight-binding calculation. In addition, HR-TEM results show the size of prepared nanosheets is about 20 nm, while X-ray photoelectron spectroscopy shows a bond formation between residual TiO2 NPs and the prepared nanosheets.http://www.sciencedirect.com/science/article/pii/S2211379720316673Graphene oxideTiO2 nanoparticlesMicrowave
spellingShingle Hadi Rasuli
Reza Rasuli
Mahdi Alizadeh
Goh BoonTong
Microwave-assisted exfoliation and tearing of graphene oxide in the presence of TiO2 nanoparticles
Results in Physics
Graphene oxide
TiO2 nanoparticles
Microwave
title Microwave-assisted exfoliation and tearing of graphene oxide in the presence of TiO2 nanoparticles
title_full Microwave-assisted exfoliation and tearing of graphene oxide in the presence of TiO2 nanoparticles
title_fullStr Microwave-assisted exfoliation and tearing of graphene oxide in the presence of TiO2 nanoparticles
title_full_unstemmed Microwave-assisted exfoliation and tearing of graphene oxide in the presence of TiO2 nanoparticles
title_short Microwave-assisted exfoliation and tearing of graphene oxide in the presence of TiO2 nanoparticles
title_sort microwave assisted exfoliation and tearing of graphene oxide in the presence of tio2 nanoparticles
topic Graphene oxide
TiO2 nanoparticles
Microwave
url http://www.sciencedirect.com/science/article/pii/S2211379720316673
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AT rezarasuli microwaveassistedexfoliationandtearingofgrapheneoxideinthepresenceoftio2nanoparticles
AT mahdializadeh microwaveassistedexfoliationandtearingofgrapheneoxideinthepresenceoftio2nanoparticles
AT gohboontong microwaveassistedexfoliationandtearingofgrapheneoxideinthepresenceoftio2nanoparticles