Fenton-like degradation of acid orange 7 using graphene oxide-iron oxide nanocomposite

Zubir, Nor Aida, Zhang, Xiwang, Yacou, Christelle and Diniz da Costa, Joao C. (2014) Fenton-like degradation of acid orange 7 using graphene oxide-iron oxide nanocomposite. Science of Advanced Materials, 6 7: 1382-1388. doi:10.1166/sam.2014.1812

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Author Zubir, Nor Aida
Zhang, Xiwang
Yacou, Christelle
Diniz da Costa, Joao C.
Title Fenton-like degradation of acid orange 7 using graphene oxide-iron oxide nanocomposite
Journal name Science of Advanced Materials   Check publisher's open access policy
ISSN 1947-2943
Publication date 2014-07-01
Year available 2014
Sub-type Article (original research)
DOI 10.1166/sam.2014.1812
Open Access Status File (Author Post-print)
Volume 6
Issue 7
Start page 1382
End page 1388
Total pages 7
Place of publication Valencia, CA United States
Publisher American Scientific Publishers
Language eng
Formatted abstract
This work presents a facile, scalable method for the fabrication of graphene oxide-iron oxide (GO-Fe3O4) nanocomposites produced by co-precipitation of iron ions onto the GO surfaces in basic aqueous media. FTIR and XRD characterisation suggests that Fe3O4 was chemically anchored to the GO sheets, possibly via the carboxyl and hydroxyl groups. Small GO loadings of 0.5 and 1 wt% were not sufficient to alter the Fe3O4 structures. However, increasing the GO loading to 5 and 10 wt% resulted in significant loss in pore volume, thus suggesting the lamellar GO sheets decorated with Fe3O4 were assembling into GO-Fe3O4 nanocomposite stacks. It was found that the GO-Fe3O4 nanocomposites had an enhanced catalytic activity in the heterogeneous Fenton-like oxidation of Acid Orange 7 (AO7) compared to pure GO flat sheets and Fe3O4 nanoparticles. Interestingly, the GO-Fe3O4 nanocomposite with 5 wt% loading ratio exhibited the best catalytic activity with 76% degradation of AO7 dye observed within 90 min of reaction. This was attributed to the synergistic effect of GO by enriching the adsorbed AO7 molecules onto the nanocomposite to be further oxidised in the vicinities of active sites. This finding suggests the promising employment of GO-Fe3O4 nanocomposites in removing organic dyes from polluted water by heterogeneous Fenton-like reaction.
Keyword Acid orange 7
Fenton-like reaction
Graphene oxide
Iron oxide
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 13 times in Scopus Article | Citations
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