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

Research output: Contribution to journalArticle

61 Citations (Scopus)
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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 languageEnglish
Pages (from-to)380-388
Number of pages9
JournalChemical Engineering Journal
Volume284
Early online date9 Sep 2015
DOIs
Publication statusPublished - 15 Jan 2016

Keywords

  • phenol
  • photodegradation
  • graphene oxide
  • thermally reduced graphene oxide
  • adsorption

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