Probing the Role of Thermally Reduced Graphene Oxide in Enhancing Performance of TiO2 in Photocatalytic Phenol Removal from Aqueous Environments

Haruna Adamu; Prashant Dubey; James A. Anderson

doi:10.1016/j.cej.2015.08.147

Probing the Role of Thermally Reduced Graphene Oxide in Enhancing Performance of TiO2 in Photocatalytic Phenol Removal from Aqueous Environments

Haruna Adamu, Prashant Dubey, James A. Anderson

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Abstract

A simple one-pot syntheses of TiO2-graphene oxide (GO)/ thermally reduced graphene oxide (TGO) composites were performed with different concentrations of GO/ TGO (0.25, 0.5 and 1.0 wt %). The materials were characterised by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, and nitrogen adsorption-desorption isotherms in order to evaluate structural and physiochemical properties of synthesised materials. The TiO2-0.25% TGO exhibited the highest photocatalytic activity for phenol degradation in aqueous solution and this was attributed to optimal adsorption efficiency of phenol along with prolonged lifetime of electron-hole pairs. Photocatalytic activity in the absence of dissolved oxygen (under nitrogen) was also performed and, in the case of TGO, confirmed the role of graphene as an electron sink and transporter for suppression of electron-hole pair recombination.

Original language	English
Pages (from-to)	380-388
Number of pages	9
Journal	Chemical Engineering Journal
Volume	284
Early online date	9 Sep 2015
DOIs	https://doi.org/10.1016/j.cej.2015.08.147
Publication status	Published - 15 Jan 2016

Keywords

phenol
photodegradation
graphene oxide
thermally reduced graphene oxide
adsorption

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© 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 71.5 KBLicence: CC BY-NC-ND
TABLES AND FIGURES revisedAccepted author manuscript, 2.01 MBLicence: CC BY-NC-ND

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title = "Probing the Role of Thermally Reduced Graphene Oxide in Enhancing Performance of TiO2 in Photocatalytic Phenol Removal from Aqueous Environments",

abstract = "A simple one-pot syntheses of TiO2-graphene oxide (GO)/ thermally reduced graphene oxide (TGO) composites were performed with different concentrations of GO/ TGO (0.25, 0.5 and 1.0 wt %). The materials were characterised by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, and nitrogen adsorption-desorption isotherms in order to evaluate structural and physiochemical properties of synthesised materials. The TiO2-0.25% TGO exhibited the highest photocatalytic activity for phenol degradation in aqueous solution and this was attributed to optimal adsorption efficiency of phenol along with prolonged lifetime of electron-hole pairs. Photocatalytic activity in the absence of dissolved oxygen (under nitrogen) was also performed and, in the case of TGO, confirmed the role of graphene as an electron sink and transporter for suppression of electron-hole pair recombination.",

keywords = "phenol, photodegradation, graphene oxide, thermally reduced graphene oxide, adsorption",

author = "Haruna Adamu and Prashant Dubey and Anderson, {James A.}",

note = "We thank the INSA-RSE bilateral exchange programme for financial assistance (PD) and the Petroleum Technology Development Fund (PTDF, Nigeria) for the award of PhD scholarship, as well as Abubakar Tafawa Balewa University, Bauchi-Nigeria for the granted fellowship (H.A).",

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doi = "10.1016/j.cej.2015.08.147",

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AU - Dubey, Prashant

AU - Anderson, James A.

N1 - We thank the INSA-RSE bilateral exchange programme for financial assistance (PD) and the Petroleum Technology Development Fund (PTDF, Nigeria) for the award of PhD scholarship, as well as Abubakar Tafawa Balewa University, Bauchi-Nigeria for the granted fellowship (H.A).

PY - 2016/1/15

Y1 - 2016/1/15

N2 - A simple one-pot syntheses of TiO2-graphene oxide (GO)/ thermally reduced graphene oxide (TGO) composites were performed with different concentrations of GO/ TGO (0.25, 0.5 and 1.0 wt %). The materials were characterised by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, and nitrogen adsorption-desorption isotherms in order to evaluate structural and physiochemical properties of synthesised materials. The TiO2-0.25% TGO exhibited the highest photocatalytic activity for phenol degradation in aqueous solution and this was attributed to optimal adsorption efficiency of phenol along with prolonged lifetime of electron-hole pairs. Photocatalytic activity in the absence of dissolved oxygen (under nitrogen) was also performed and, in the case of TGO, confirmed the role of graphene as an electron sink and transporter for suppression of electron-hole pair recombination.

AB - A simple one-pot syntheses of TiO2-graphene oxide (GO)/ thermally reduced graphene oxide (TGO) composites were performed with different concentrations of GO/ TGO (0.25, 0.5 and 1.0 wt %). The materials were characterised by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, and nitrogen adsorption-desorption isotherms in order to evaluate structural and physiochemical properties of synthesised materials. The TiO2-0.25% TGO exhibited the highest photocatalytic activity for phenol degradation in aqueous solution and this was attributed to optimal adsorption efficiency of phenol along with prolonged lifetime of electron-hole pairs. Photocatalytic activity in the absence of dissolved oxygen (under nitrogen) was also performed and, in the case of TGO, confirmed the role of graphene as an electron sink and transporter for suppression of electron-hole pair recombination.

KW - phenol

KW - photodegradation

KW - graphene oxide

KW - thermally reduced graphene oxide

KW - adsorption

U2 - 10.1016/j.cej.2015.08.147

DO - 10.1016/j.cej.2015.08.147

M3 - Article

VL - 284

SP - 380

EP - 388

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

SN - 1385-8947

ER -

Probing the Role of Thermally Reduced Graphene Oxide in Enhancing Performance of TiO2 in Photocatalytic Phenol Removal from Aqueous Environments

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Keywords

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