Magnetically-separable hierarchically porous carbon monoliths with partially graphitized structures as excellent adsorbents for dyes

作者：Liu Yurong^*; Lin Baoping; Li Dan; Zhang Xueqin; Sun Ying; Yang Hong

来源：Journal of Porous Materials, 2014, 21(6): 933-938.

DOI：10.1007/s10934-014-9841-4

• Magnetically-separable
• Carbon monolith
• Hierarchically porous
• Graphitized structure
• Adsorbents for dyes

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 mu m, mesopore size of 4.8 nm, BET surface area of 723 m(2)/g, pore volume of 0.46 cm(3)/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.

• 出版日期2014-12
• 单位东南大学; 重庆大学