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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: Rasuli, Hadi, Rasuli, Reza, Alizadeh, Mahdi, Goh, Boon Tong
Format: Article
Published: Elsevier 2020
Subjects:
Q Science (General)
QC Physics
Online Access:http://eprints.um.edu.my/25324/
https://doi.org/10.1016/j.rinp.2020.103200
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spelling my.um.eprints.253242020-08-13T02:52:35Z http://eprints.um.edu.my/25324/ Microwave-assisted exfoliation and tearing of graphene oxide in the presence of TiO2 nanoparticles Rasuli, Hadi Rasuli, Reza Alizadeh, Mahdi Goh, Boon Tong Q Science (General) QC Physics 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. © 2020 The Author(s) Elsevier 2020 Article PeerReviewed Rasuli, Hadi and Rasuli, Reza and Alizadeh, Mahdi and Goh, Boon Tong (2020) Microwave-assisted exfoliation and tearing of graphene oxide in the presence of TiO2 nanoparticles. Results in Physics, 18. p. 103200. ISSN 2211-3797 https://doi.org/10.1016/j.rinp.2020.103200 doi:10.1016/j.rinp.2020.103200
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
QC Physics
spellingShingle Q Science (General)
QC Physics
Rasuli, Hadi
Rasuli, Reza
Alizadeh, Mahdi
Goh, Boon Tong
Microwave-assisted exfoliation and tearing of graphene oxide in the presence of TiO2 nanoparticles
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. © 2020 The Author(s)
format Article
author Rasuli, Hadi
Rasuli, Reza
Alizadeh, Mahdi
Goh, Boon Tong
author_facet Rasuli, Hadi
Rasuli, Reza
Alizadeh, Mahdi
Goh, Boon Tong
author_sort Rasuli, Hadi
title 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_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_sort microwave-assisted exfoliation and tearing of graphene oxide in the presence of tio2 nanoparticles
publisher Elsevier
publishDate 2020
url http://eprints.um.edu.my/25324/
https://doi.org/10.1016/j.rinp.2020.103200
_version_ 1680857018671300608
score 13.211869

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