中文摘要：

以Fe3O4为核心，采用具有亲水性基团的碳层为连接桥梁，利用钛酸丁酯水解过程中产生的二氧化钛与亲水性基团的键合作用，制得Fe3O4@TiO2磁性复合材料。通过改变原料的用量和反应条件，采用SEM、TEM、XRD等测试手段，对磁性复合材料的粒径大小、分散性以及改性效果进行了探究。结果表明：该磁性复合材料直径为300 nm，分散性良好，改性效果优异。

英文摘要：

The Fe3O4@TiO2 magnetic composite materials were prepared by putting the Fe3O4 in inner as the core, the carbon layer which has a amount of hydrophilic group as the connecting bridge, utilizing the combined effects of valence bond between the hydrophilic groups and TiO2 generated during the hydrolysis process of tetrabutyl titanate. By changing the amount of raw materials and the reaction conditions, the particle size, dispersion and modification effect of magnetic composites were explored with the aid of SEM, TEM, XRD and other testing methods. The results showed that the diameter of magnetic composites is 300 nm, and the magnetic composites have good dispersibility and excellent modification effect.