Abstract
Magnetically-separable hierarchically porous carbon monoliths with partially graphitized structures were synthesized through confinement self-assembly in polyurethane (PU) foam associated with a direct carbonization process from triblock copolymer F127, phenolic resol and ferric nitrate. It was observed that the magnetic Fe nanoparticles were embedded in the walls of graphitic porous carbon matrix, and the resulting materials exhibited hierarchically porous structure with macropores of 100–450 μm, mesopore size of 4.8 nm, BET surface area of 723 m2/g, pore volume of 0.46 cm3/g, and saturation magnetization of 3.1 emu/g. Using methylene blue as model dye pollutant in water, the carbon monolith materials showed high adsorption capacity of 190 mg/g, exhibiting excellent adsorption characteristics desirable for the application in adsorption of dyes and easy separation under an external magnetic field.
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The authors gratefully acknowledge the financial supports from the Program of Chongqing Municipal Education Commission (KJ121201), the First Excellent Young Teachers Program of Chongqing high school ([2011]65), Chongqing Yongchuan Key Technologies R&D Program (YCSTC, 2011AC4001) and Research Program of Chongqing University of Arts and Sciences (Z2011RCYJ04).
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Liu, Y., Lin, B., Li, D. et al. Magnetically-separable hierarchically porous carbon monoliths with partially graphitized structures as excellent adsorbents for dyes. J Porous Mater 21, 933–938 (2014). https://doi.org/10.1007/s10934-014-9841-4
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DOI: https://doi.org/10.1007/s10934-014-9841-4