Green synthesis of Au decorated CoFe2O4 nanoparticles for catalytic reduction of 4-nitrophenol and dimethylphenylsilane oxidation

Samuel Saire-Saire, Eduardo C.M. Barbosa, Daniel Garcia, Leandro H. Andrade, Sergio GARCIA SEGURA, Pedro H.C. Camargo, Hugo Alarcon

Research output: Contribution to journalArticle

Abstract

Gold nanoparticles (Au NPs) have been widely employed in catalysis. Here, we report on the synthesis and catalytic evaluation of a hybrid material composed of Au NPs deposited at the surface of magnetic cobalt ferrite (CoFe2O4). Our reported approach enabled the synthesis of well-defined Au/CoFe2O4 NPs. The Au NPs were uniformly deposited at the surface of the support, displayed spherical shape, and were monodisperse in size. Their catalytic performance was investigated towards the reduction of 4-nitrophenol and the selective oxidation of dimethylphenylsilane to dimethylphenylsilanol. The material was active towards both transformations. In addition, the LSPR excitation in Au NPs could be employed to enhance the catalytic performance, which was demonstrated in the 4-nitrophenol reduction. Finally, the magnetic support allowed for the easy recovery and reuse of the Au/CoFe2O4 NPs. In this case, our data showed that no significant loss of performance took place even after 10 reaction cycles in the oxidation of dimethylphenylsilane to dimethylphenylsilanol. Overall, our results indicate that Au/CoFe2O4 are interesting systems for catalytic applications merging high performances, recovery and re-use, and enhancement of activities under solar light illumination.

Original languageEnglish (US)
Pages (from-to)22116-22123
Number of pages8
JournalRSC Advances
Volume9
Issue number38
DOIs
StatePublished - Jan 1 2019

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Nanoparticles
Recovery
Oxidation
Hybrid materials
Merging
Catalysis
Ferrite
Cobalt
Lighting
Gold
Nitrophenols
cobalt ferrite
4-nitrophenol

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Green synthesis of Au decorated CoFe2O4 nanoparticles for catalytic reduction of 4-nitrophenol and dimethylphenylsilane oxidation. / Saire-Saire, Samuel; Barbosa, Eduardo C.M.; Garcia, Daniel; Andrade, Leandro H.; GARCIA SEGURA, Sergio; Camargo, Pedro H.C.; Alarcon, Hugo.

In: RSC Advances, Vol. 9, No. 38, 01.01.2019, p. 22116-22123.

Research output: Contribution to journalArticle

Saire-Saire, Samuel ; Barbosa, Eduardo C.M. ; Garcia, Daniel ; Andrade, Leandro H. ; GARCIA SEGURA, Sergio ; Camargo, Pedro H.C. ; Alarcon, Hugo. / Green synthesis of Au decorated CoFe2O4 nanoparticles for catalytic reduction of 4-nitrophenol and dimethylphenylsilane oxidation. In: RSC Advances. 2019 ; Vol. 9, No. 38. pp. 22116-22123.
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