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From metal-organic frameworks to magnetic nanostructured porous carbon composites: towards highly efficient dye removal and degradationElectronic supplementary information (ESI) available. See DOI: 10.1039/c4ra15942j
A magnetic nanostructured porous carbon material (γ-Fe 2 O 3 /C) was easily synthesized using a microwave-enhanced high-temperature ionothermal method with an iron terephthalate metal-organic framework-MIL-53(Fe), as a template. The structure, morphology, magnetic properties, and porosity of γ-Fe 2...
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Main Authors: | , , , , , |
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Format: | Article |
Language: | English |
Online Access: | Get full text |
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Summary: | A magnetic nanostructured porous carbon material (γ-Fe
2
O
3
/C) was easily synthesized using a microwave-enhanced high-temperature ionothermal method with an iron terephthalate metal-organic framework-MIL-53(Fe), as a template. The structure, morphology, magnetic properties, and porosity of γ-Fe
2
O
3
/C were characterized by powder X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, high-resolution transmission electron microscopy, vibrating sample magnetometry, and Brunauer-Emmett-Teller surface area analysis. The obtained porous carbon materials (γ-Fe
2
O
3
/C), possessed a high specific surface area (397.2 m
2
g
−1
) and pore volume (0.495 cm
2
g
−1
). The adsorption properties were tested by removal of malachite green (MG) from an aqueous solution. After reaching adsorption equilibrium, the maximum adsorption capacity was 499 mg g
−1
at 30 °C, and reached 863 mg g
−1
at 60 °C. The excellent magnetism (20.10 emu g
−1
) provided an ideal magnetic-separation performance. Analysis of the sorption kinetics and isotherms showed that these sorption processes were better fitted to the pseudo-second-order and Langmuir equations than pseudo-first-order and Freundlich equations. Various thermodynamic parameters, such as Δ
G
, Δ
S
, and Δ
H
, were also calculated, and indicated that the present system was spontaneous and endothermic. It was further demonstrated that γ-Fe
2
O
3
showed powerful photocatalytic activity for the degradation of MG under sunlight in the presence of H
2
O
2
.
A magnetic nanostructured porous carbon material (γ-Fe
2
O
3
/C) was easily synthesized using a microwave-enhanced high-temperature ionothermal method with an iron terephthalate metal-organic framework-MIL-53(Fe), as a template. |
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ISSN: | 2046-2069 |
DOI: | 10.1039/c4ra15942j |