以铁基离子液体[BMIm]FeCl₄和木质纤维类生物质废弃物为前驱体，采用离子热碳化方法制得铁/氮共掺杂生物炭（Fe-N/BC）催化剂，并对其性质进行了表征。研究了Fe-N/BC催化剂活化过一硫酸盐（PMS）处理有机污染物罗丹明B和双酚A的性能，并对Fe-N/BC催化剂进行了吸附实验、催化动力学实验和自由基淬灭实验。结果表明，Fe-N/BC为包覆有铁金属纳米颗粒的氮掺杂石墨化碳材料，空泡结构和发达的孔隙结构使其具有很强的吸附性能，60 min后才达到吸附平衡，吸附50%的双酚A；加入氧化剂过一硫酸盐后，30 min后对双酚A的降解率达到95.5%，远远快于氮掺杂生物炭（N/BC）材料和生物炭（BC）。Fe-N/BC活化PMS降解双酚A过程中对pH不敏感，反应方式主要通过非自由基路径实现。

Using ionic liquid[BMIm]FeCl₄ and lignocellulosic biomass wastes as precursors,iron/nitrogen co-doped biochar (Fe-N/BC) catalysts are prepared via a two-step ion-thermal carbonization process,and analyzed via various physicochemical methods.The as-prepared Fe-N/BC catalysts are employed to activate permonosulfate (PMS) for degrading rhodamine B and bisphenol A.The adsorption experiments,catalytic kinetics experiments and free radical quenching experiments are carried out to evaluate the catalytic performance of Fe-N/BC catalysts.It is indicated that Fe-N/BC catalysts show a high efficiency in the activation of PMS to degrade organic pollutants,much higher than the biochar materials without Fe or N doping.The degradation process of pollutants by Fe-N/BC activated PMS is insensitive to pH,and non-radical pathway is identified as the main mechanism for the degradation of pollutants.

季翔宇(1996-),男,硕士研究生,研究方向为废弃生物质利用,july@mail.ustc.edu.cn;刘武军(1985-),男,博士,研究员,研究方向为可持续化学与工程,通讯联系人,liuwujun@ustc.edu.cn。