【摘要】 以三嵌段共聚物为软模,间苯二酚-甲醛为炭前躯体,硝酸铁为铁源合成了磁性有序介孔炭,用XRD、氮气吸附、磁性测试等方法对样品进行表征。结果表明,当硝酸铁与间苯二酚摩尔比为0.025、0.05及0.10时得到的介孔炭具有有序性,随着铁质量分数的增加,有序性降低,比表面积、孔容都相应减小。基本磁化曲线结果表明,随着铁质量分数的增加,饱和磁化强度随之增加(0.01～0.10 emu/g),材料具有较好的磁性,容易从溶液中分离,表现出良好的分离性能。为磁性有序介孔炭的优化合成及磁性分离应用提供科学依据。更多还原

【Abstract】 Magnetic ordered mesoporous carbon is synthesized through soft templating method by using triblock-copolymer Pluronic F127 as soft template,resorcinol-formaldehyde(RF) as carbon precursor and ferric nitrate as an iron source.HCl is used as the catalyst for RF polymerization.The resultant materials are characterized by X-ray diffraction,N2 sorption and vibrating-sample magnetometer measurements.The results show that magnetic ordered mesoporous carbons are obtained when the Fe/R ratio is 0.025.For those with Fe/R ratios greater than this value,the ordering,the BET surface area,pore volume and pore size decrease.N2 sorption isotherms of all the samples show representative type IV curves with H1 hysteresis loops,which indicates a typical mesoporous material.Magnetic hysteresis loops show that the remanent magnetization of Fe/OMC samples increases with the increase of the content of Fe.This research can provide scientific proof for the optimized synthesis and application in magnetic separation for magnetic ordered mesoporous carbons.更多还原