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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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Bibliographic Details
Main Authors: Zhang, Cong, Ye, Fanggui, Shen, Shufen, Xiong, Yuhao, Su, Linjing, Zhao, Shulin
Format: Article
Language:English
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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.
ISSN:2046-2069
DOI:10.1039/c4ra15942j