蛋黄-壳介孔磁性炭微球的制备及其对红霉素的高效吸附  

Preparation of yolk-shell mesoporous magnetic carbon microspheres and its efficient adsorption of erythromycin

作　　者：刘念 陈葵[1] 武斌[1] 纪利俊[1] 吴艳阳[1] 韩金玲 LIU Nian;CHEN Kui;WU Bin;JI Lijun;WU Yanyang;HAN Jinling(College of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学化工学院,上海200237

出　　处：《化工进展》2023年第5期2724-2732,共9页Chemical Industry and Engineering Progress

摘　　要：以溶剂热法制得的Fe_(3)O_(4)纳米颗粒为磁核,正硅酸四乙酯(TEOS)为造孔前体,间苯二酚-甲醛树脂(RF)为碳源,一步法制备蛋黄-壳介孔磁性炭微球(Fe_(3)O_(4)@C),并将其作为吸附剂用于去除水中的红霉素。采用TEM、XRD、FTIR、BET和VSM对Fe_(3)O_(4)@C进行表征。结果表明,Fe_(3)O_(4)@C核壳之间具有大空腔,比表面积为444m^(2)/g,平均孔径为7.7nm,具有超顺磁性。通过静态吸附实验研究了Fe_(3)O_(4)@C对红霉素的吸附平衡和速率,并确定了优化的操作条件。结果表明,在吸附剂投加量为1.0g/L、初始红霉素浓度为300mg/L、pH为10的优化条件下,Fe_(3)O_(4)@C对红霉素的吸附量为210mg/g。Fe_(3)O_(4)@C对红霉素的吸附过程是自发的、吸热的和不可逆的,遵循准二级动力学和Langmuir等温线模型。经3次循环再生后,Fe_(3)O_(4)@C吸附量仍能维持在初始吸附量的86%以上。With Fe_(3)O_(4)nanoparticles prepared by solvothermal method as magnetic cores,tetraethyl orthosilicate as the pore-forming precursor,and resorcinol-formaldehyde resin as the carbon source,yolk-shell mesoporous magnetic carbon microspheres(abbreviated as Fe_(3)O_(4)@C)were prepared by one step method,and used as adsorbent to remove erythromycin from water.It was characterized by TEM,XRD,FTIR,BET and VSM.The results demonstrated that the prepared Fe_(3)O_(4)@C core-shell had a large cavity,with specific surface area of 444m^(2)/g and average pore diameter of 7.7nm,and exhibits superparamagnetic properties.The adsorption equilibrium and rate of Fe_(3)O_(4)@C to erythromycin were studied by batch experiments,and the optimal operating conditions were determined.The results indicated that the adsorption capacity of Fe_(3)O_(4)@C for erythromycin was 210mg/g under the optimized conditions of adsorbent dosage of 1.0g/L,initial erythromycin concentration of 300mg/L and pH of 10.The adsorption process of Fe_(3)O_(4)@C to erythromycin was spontaneous,endothermic and irreversible,following pseudo-second-order kinetics and Langmuir isotherm models.After three cycles of regeneration,the adsorption capacity of Fe_(3)O_(4)@C still remained above 86%of the initial adsorption capacity.

关 键 词：介孔 磁性碳微球 复合材料 吸附 红霉素 分离 

分 类 号：TB333[一般工业技术—材料科学与工程]