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

doi:10.1088/1361-6528/aac305

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

Department of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

13 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 language	English
Article number	305606
Journal	Nanotechnology
Volume	29
Issue number	30
DOIs	https://doi.org/10.1088/1361-6528/aac305
Publication status	Published - 2018 May 24

All Science Journal Classification (ASJC) codes

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

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10.1088/1361-6528/aac305

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Liu, S. H., Lu, J. S., & Yang, S. W. (2018). Highly visible-light-responsive Cu ₂ O/rGO decorated with Fe ₃ O ₄ @SiO ₂ nanoparticles as a magnetically recyclable photocatalyst Nanotechnology, 29(30), Article 305606. https://doi.org/10.1088/1361-6528/aac305

Liu, Shou Heng ; Lu, Jun Sheng ; Yang, Sheng Wei. / Highly visible-light-responsive Cu ₂ O/rGO decorated with Fe ₃ O ₄ @SiO ₂ nanoparticles as a magnetically recyclable photocatalyst In: Nanotechnology. 2018 ; Vol. 29, No. 30.

@article{7b7b842e31194914ad90241e3a6df9fb,

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. ",

author = "Liu, {Shou Heng} and Lu, {Jun Sheng} and Yang, {Sheng Wei}",

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doi = "10.1088/1361-6528/aac305",

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Liu, SH, Lu, JS & Yang, SW 2018, ' Highly visible-light-responsive Cu ₂ O/rGO decorated with Fe ₃ O ₄ @SiO ₂ nanoparticles as a magnetically recyclable photocatalyst ', Nanotechnology, vol. 29, no. 30, 305606. https://doi.org/10.1088/1361-6528/aac305

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 journal › Article › peer-review

TY - JOUR

T1 - Highly visible-light-responsive Cu 2 O/rGO decorated with Fe 3 O 4 @SiO 2 nanoparticles as a magnetically recyclable photocatalyst

AU - Liu, Shou Heng

AU - Lu, Jun Sheng

AU - Yang, Sheng Wei

PY - 2018/5/24

Y1 - 2018/5/24

N2 - 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.

AB - 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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Liu SH, Lu JS, Yang SW. Highly visible-light-responsive Cu ₂ O/rGO decorated with Fe ₃ O ₄ @SiO ₂ nanoparticles as a magnetically recyclable photocatalyst Nanotechnology. 2018 May 24;29(30):305606. doi: 10.1088/1361-6528/aac305

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

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