载铁有序介孔碳材料的合成及对对氯酚的吸附性能

Synthesis of ordered Fe-containingmesoporous carbon materials and its adsorption of 4-chlorophenol

以酚醛树脂为碳源,F127为模板剂,硝酸铁为铁源,采用软模板路线,一步合成了载铁有序介孔碳(Fe/OMC)复合材料。采用XRD、N2吸附、TEM手段对材料的结构进行了表征,结果表明Fe/OMC复合材料具有高度有序的二维六方介孔结构,孔径均一。在此基础上,比较了未载铁介孔碳(OMC)与Fe/OMC对对氯酚的吸附性能。在初始浓度为1.20×10-4,吸附剂用量为0.5g/L的条件下,OMC对对氯酚的去除率为46.6%,Fe/OMC对对氯酚的去除率94.6%,去除率约为OMC的2倍。采用Langmuir等温吸附线对吸附结果进行拟合。结果表明两种材料对氯酚的吸附行为均能较好地拟合Langmuir方程,OMC材料对4-CP的饱和吸附量为82mg/g,Fe/OMC材料对4-CP的饱和吸附量为284mg/g,Fe/OMC材料的饱和吸附容量约为OMC的3倍。

Ordered mesoporous carbon containing iron （Fe/OMC） materials were synthesized via soft-template routes, using phenol-formaldehyde resol （PF） polymerized as carbon precursor, triblock copolymer F127 as template agent, inorganic iron salts ferric nitrate as metal precursor in one pot. The structure was characterized by X-ray diffraction, N2 adsorption/desorption and transmission electron microscopy. The results show that or dered Fe-containing mesoporous carbon materials have well-ordered two dimensional hexagonal mesostructure, uniform pore diameter. On this basis, comparative adsorption properties of 4-chlorophenol（4-CP） of ordered mesoporous carbon（OMC）and ordered mesoporous carbon containing iron （Fe/OMC）. In the initial concentra tion was 1.20×10-4, adsorbent dosage was 0. 5g/L conditions, the removal of OMC to 4-CP was 46.6%. and the Fe/OMCwas94.6%, which was about twice thanOMC. The adsorption isotherm could be better fitted by Langmuir models, the greatest adsorption capacity of OMC to 4-CP was 82mg/g. and tbe Fe/OMC was 284mg： g, which was about three times than OMC.