Highly visible-light-responsive Cu 2 O/rGO decorated with Fe 3 O 4 @SiO 2 nanoparticles as a magnetically recyclable photocatalyst

Shou-Heng Liu, Jun Sheng Lu, Sheng Wei Yang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The rhombic dodecahedral cuprous oxide-reduced graphene oxide/core-shell Fe 3 O 4 @SiO 2 composites (denoted as rCu 2 O-rGO/Fe 3 O 4 @SiO 2 ) are successfully synthesized facilely via a wet-chemical route. The resulting rCu 2 O-rGO/Fe 3 O 4 @SiO 2 combines the unique structure of Cu 2 O, electronic characteristics of reduced graphene oxide (rGO) and magnetic property of Fe 3 O 4 @SiO 2 to be an effective and recoverable photocatalyst for the degradation of methyl orange (MO). The obtained results show that rCu 2 O-rGO/Fe 3 O 4 @SiO 2 is capable of completely degrading MO in the presence of a very low catalyst concentration (0.125 g l -1 ) within a short time (60 min) under visible light compared to the reported catalysts. The observations may be due to the distinctive interfacial structures of rhombic dodecahedral Cu 2 O nanoparticles connected to rGO sheets that can enhance the separation of photogenerated electron-hole pairs, stabilize the Cu 2 O and increase MO adsorption, as evidenced by a variety of spectroscopic analyses (transmission electron microscopy, x-ray photoelectron spectroscopy and photoluminescence). More importantly, these efficient photocatalysts can easily be recovered under a magnetic field and remain highly photoactive towards the degradation of MO after cyclic tests, and may be promising photocatalysts for practical applications in the solar-energy purification of wastewater.

Original languageEnglish
Article number305606
JournalNanotechnology
Volume29
Issue number30
DOIs
Publication statusPublished - 2018 May 24

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Photocatalysts
Oxides
Graphene
Nanoparticles
Degradation
Catalysts
Photoelectron spectroscopy
Solar energy
Purification
Magnetic properties
Photoluminescence
Wastewater
Magnetic fields
Transmission electron microscopy
Adsorption
X rays
methyl orange
Electrons
Composite materials

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

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title = "Highly visible-light-responsive Cu 2 O/rGO decorated with Fe 3 O 4 @SiO 2 nanoparticles as a magnetically recyclable photocatalyst",
abstract = "The rhombic dodecahedral cuprous oxide-reduced graphene oxide/core-shell Fe 3 O 4 @SiO 2 composites (denoted as rCu 2 O-rGO/Fe 3 O 4 @SiO 2 ) are successfully synthesized facilely via a wet-chemical route. The resulting rCu 2 O-rGO/Fe 3 O 4 @SiO 2 combines the unique structure of Cu 2 O, electronic characteristics of reduced graphene oxide (rGO) and magnetic property of Fe 3 O 4 @SiO 2 to be an effective and recoverable photocatalyst for the degradation of methyl orange (MO). The obtained results show that rCu 2 O-rGO/Fe 3 O 4 @SiO 2 is capable of completely degrading MO in the presence of a very low catalyst concentration (0.125 g l -1 ) within a short time (60 min) under visible light compared to the reported catalysts. The observations may be due to the distinctive interfacial structures of rhombic dodecahedral Cu 2 O nanoparticles connected to rGO sheets that can enhance the separation of photogenerated electron-hole pairs, stabilize the Cu 2 O and increase MO adsorption, as evidenced by a variety of spectroscopic analyses (transmission electron microscopy, x-ray photoelectron spectroscopy and photoluminescence). More importantly, these efficient photocatalysts can easily be recovered under a magnetic field and remain highly photoactive towards the degradation of MO after cyclic tests, and may be promising photocatalysts for practical applications in the solar-energy purification of wastewater.",
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Highly visible-light-responsive Cu 2 O/rGO decorated with Fe 3 O 4 @SiO 2 nanoparticles as a magnetically recyclable photocatalyst . / Liu, Shou-Heng; Lu, Jun Sheng; Yang, Sheng Wei.

In: Nanotechnology, Vol. 29, No. 30, 305606, 24.05.2018.

Research output: Contribution to journalArticle

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