Magnetically separable reduced graphene oxide/iron oxide nanocomposite materials for environmental remediation

Teo Peik-See, Alagarsamy Pandikumar, Lim Hong Ngee, Huang Nay Ming, Chin Hua Chia

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

Magnetically separable reduced graphene oxide/iron oxide (rGO/Fe3O4) nanocomposite materials were synthesized at room temperature through a facile, eco-friendly and cost-effective approach. The prepared nanocomposite materials were characterized by different techniques. X-ray diffraction analysis revealed the formation of the rGO/Fe3O4 nanocomposites, while transmission electron microscope images showed that the Fe3O4 nanoparticles with an average size of 10 nm were embedded uniformly on the surface of rGO sheets. The synthesized rGO/Fe3O4 nanocomposite materials were found to be super-paramagnetic in nature at room temperature. The photocatalytic performance of the rGO/Fe3O4 nanocomposite materials was investigated under natural sunlight irradiation using methylene blue (MB) as a model target organic pollutant. The rGO/Fe3O4 showed better adsorption behaviour and excellent photocatalytic activity towards the degradation of MB, when compared to other samples such as rGO and pristine Fe3O4 nanoparticles. This enhanced photocatalytic activity could be attributed to the synergistic effect that arises between the rGO and Fe3O4, which significantly reduces charge recombination. Moreover, the rGO/Fe3O4 nanocomposite materials exhibited good sustainability, which was evidenced by their consistent photocatalytic performance and the absence of any observable changes in morphology, even after eight cycles of operation during photocatalytic experiments. The overall results of the study indicate that these newly prepared photocatalytically stable and magnetically separable rGO/Fe3O4 nanocomposites could be potentially utilized for many environmental remediation applications.

Original languageEnglish
Pages (from-to)4396-4405
Number of pages10
JournalCatalysis Science and Technology
Volume4
Issue number12
DOIs
Publication statusPublished - 1 Dec 2014

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Iron oxides
Graphene
Nanocomposites
Oxides
Methylene Blue
Nanoparticles
Organic pollutants
Environmental Restoration and Remediation
ferric oxide
X ray diffraction analysis
Sustainable development
Electron microscopes
Irradiation
Adsorption
Degradation
Temperature
Costs

ASJC Scopus subject areas

  • Catalysis

Cite this

Magnetically separable reduced graphene oxide/iron oxide nanocomposite materials for environmental remediation. / Peik-See, Teo; Pandikumar, Alagarsamy; Ngee, Lim Hong; Ming, Huang Nay; Chia, Chin Hua.

In: Catalysis Science and Technology, Vol. 4, No. 12, 01.12.2014, p. 4396-4405.

Research output: Contribution to journalArticle

Peik-See, Teo ; Pandikumar, Alagarsamy ; Ngee, Lim Hong ; Ming, Huang Nay ; Chia, Chin Hua. / Magnetically separable reduced graphene oxide/iron oxide nanocomposite materials for environmental remediation. In: Catalysis Science and Technology. 2014 ; Vol. 4, No. 12. pp. 4396-4405.
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