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Magnetic CoFe2O4 nanoparticles supported on graphene oxide (CoFe2O4/GO) with high catalytic activity for peroxymonosulfate activation and degradation of rhodamine B
Herein, we report the preparation of magnetic CoFe 2 O 4 nanoparticles and CoFe 2 O 4 /graphene oxide (GO) hybrids and evaluate their catalytic activity as heterogeneous peroxymonosulfate (PMS) activators for the decomposition of rhodamine B. The surface morphologies and structures of both CoFe 2 O...
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Published in: | RSC advances 2018-01, Vol.8 (3), p.1351-136 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | Herein, we report the preparation of magnetic CoFe
2
O
4
nanoparticles and CoFe
2
O
4
/graphene oxide (GO) hybrids and evaluate their catalytic activity as heterogeneous peroxymonosulfate (PMS) activators for the decomposition of rhodamine B. The surface morphologies and structures of both CoFe
2
O
4
nanoparticles and CoFe
2
O
4
/GO hybrids were investigated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and nitrogen adsorption-desorption isotherms. The magnetic properties of the samples were assessed using a SQUID magnetometer at 298 K. Catalytic oxidation experiments demonstrated that CoFe
2
O
4
/GO hybrids exhibited much better catalytic activity than CoFe
2
O
4
nanoparticles or CoFe
2
O
4
/reduced graphene oxide (rGO) hybrids, suggesting that GO plays an important role in CoFe
2
O
4
/GO hybrids in the decomposition of rhodamine B. The influence of various reaction conditions such as temperature, concentration of PMS, pH and decomposition time of rhodamine B over the CoFe
2
O
4
/GO catalyst were investigated and optimized. The rhodamine B degradation process was found to fit a pseudo-first order kinetics model. The catalyst could be easily separated from the reaction mixture by applying an external magnet. In particular, the as-prepared CoFe
2
O
4
/GO hybrid exhibited good reusability and stability in successive degradation experiments in PMS solution.
Herein, we report the preparation of magnetic CoFe
2
O
4
nanoparticles and CoFe
2
O
4
/graphene oxide (GO) hybrids and evaluate their catalytic activity as heterogeneous peroxymonosulfate (PMS) activators for the decomposition of rhodamine B. |
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ISSN: | 2046-2069 |
DOI: | 10.1039/c7ra09949e |