文献类型：期刊文献

中文题名：蛋黄-壳介孔磁性炭微球的制备及其对红霉素的高效吸附

英文题名：Preparation of yolk-shell mesoporous magnetic carbon microspheres and its efficient adsorption of erythromycin

作者：刘念[1];陈葵[1];武斌[1];纪利俊[1];吴艳阳[1];韩金玲[1]

机构：[1]华东理工大学化工学院,上海200237

年份：2023

卷号：42

期号：5

起止页码：2724

中文期刊名：化工进展

外文期刊名：Chemical Industry and Engineering Progress

收录：CSTPCD;;EI(收录号：20232614301237);Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

语种：中文

中文关键词：介孔;磁性碳微球;复合材料;吸附;红霉素;分离

外文关键词：mesoporous;magnetic carbon microspheres;composites;adsorption;erythromycin;separation

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.