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以碳纳米管、硝酸铁和硝酸锌为材料,通过化学沉积方法制备磁性功能化的碳纳米管。将铁氧体纳米粒子负载到多壁碳纳米管的表面,得到ZnFe2O4/CNTs磁性复合材料,通过SEM、TEM、XRD、VSM进行表征。该材料在室温下为超顺磁性,饱和磁化强度为16.104A.m2/kg,在酸性溶液(pH值为2)中,Fe3+的最大渗出量为10.56mg/g。用所制备的ZnFe2O4/CNTs复合材料对盐酸四环素溶液进行吸附试验。结果表明,该材料在一定范围内吸附容量随污染物质量浓度增加而增大,随温度升高而减小。在25℃、盐酸四环素初始质量浓度为20mg/L时,ZnFe2O4/CNTs复合材料的吸附容量为21.8 mg/g,污染物去除率达到54.5%。
Carbon nanotubes, ferric nitrate and zinc nitrate were used as materials to prepare magnetically functionalized carbon nanotubes by chemical deposition. The ferrite nanoparticles were loaded onto the surface of multi-walled carbon nanotubes to obtain magnetic composites of ZnFe2O4 / CNTs. The composites were characterized by SEM, TEM, XRD and VSM. The material is superparamagnetic at room temperature with a saturation magnetization of 16.104 A.m2 / kg. The maximum exudation of Fe3 + in an acidic solution (pH 2) is 10.56 mg / g. Adsorption experiments of tetracycline hydrochloride solution were carried out with the prepared ZnFe2O4 / CNTs composites. The results showed that the adsorption capacity of the material increased with the increase of pollutant concentration within a certain range, and decreased with the increase of temperature. The adsorption capacity of ZnFe2O4 / CNTs composites was 21.8 mg / g and the pollutant removal rate reached 54.5% when the initial concentration of tetracycline hydrochloride was 20 mg / L at 25 ℃.