构建了一种在磁性纳米颗粒表面包覆介孔碳层的制备方法。探究了2种硅前驱体四乙氧基硅烷（TEOS）和四丙氧基硅烷（TPOS）造孔剂对碳层表面孔结构的影响，同时研究了在碳微球制备过程中硅前驱体引入方式对碳层孔结构形成的影响。利用X射线衍射仪、透射电子显微镜、全孔分析等手段对材料的组成、形貌、比表面和孔结构进行表征。结果表明，采用TEOS和TPOS造孔剂，碳微球的比表面积较硅前驱体引入前有显著提高，在选定实验条件下比表面积可提高1.5倍；同时丰富了介孔结构，介孔孔容占比由引入前的18%提高至90%以上。考察了该材料对抗生素红霉素的吸附性能，硅前驱体引入后的磁性介孔碳微球的吸附量提高3.1~5.5倍。

A preparation method for coating a mesoporous carbon layer on the surface of magnetic nanoparticles is built.The effects of two silicon precursors,tetraethoxysilane (TEOS) and tetrapropoxysilane (TPOS),as pore forming agents on the surface pore structure of the carbon layer are investigated.The influence of the silicon precursor feeding method on the pore structure formation is also studied in the preparation process of carbon microspheres.The composition,morphology,specific surface and pore structure of the carbon microspheres material are characterized by X-ray diffraction (XRD),transmission electron microscope (TEM) and full pore analysis.It is shown that the specific surface area of carbon microspheres is significantly improved compared with that before modification when TEOS and TPOS are used as pore-forming agents.The specific surface area is increased by 1.5 times under the selected experimental conditions.At the same time,the mesoporous pore volume ratio is increased to above 90% from 18% before modification,proving an enriched mesoporous structure.The carbon microspheres' adsorption performance on erythromycin is investigated,and the adsorption capacity is improved by 3.1-5.5 times after modification.

梁圣吉(1993-),女,硕士研究生,研究方向为磁性碳微球的制备与应用,alex_lsj@foxmail.com