以甲酸溶液为介质的磁性介孔硅纳米材料的制备及其吸附性能

发布时间：2018-01-12 13:06

本文关键词：以甲酸溶液为介质的磁性介孔硅纳米材料的制备及其吸附性能　出处：《华东理工大学学报(自然科学版)》2017年02期 　论文类型：期刊论文

【摘要】：以甲酸溶液为介质,采用溶剂热法、改良的Stober法,用聚乙烯-聚乳酸共聚物做模板剂制备磁性介孔硅纳米材料,通过X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、综合物性测量系统(PPMS)、比表面积及孔径分布测量仪等分析测试手段对所得磁性介孔硅纳米材料进行表征,并研究了其吸附性能。结果显示,以0.2mol/L甲酸溶液为介质制备的磁性介孔材料孔径为8.2nm、比表面积为258m2/g、孔体积为0.32cm3/g,饱和磁化强度达53A·m2/kg。这种磁性介孔硅纳米材料对牛血清蛋白、中性红、亚甲基蓝等物质有良好的吸附能力,其饱和吸附量分别达到53.6、24.1、66.8mg/g,表明制备的磁性介孔硅纳米材料在复杂环境样品的分离和富集方面具有一定的应用前景。
[Abstract]:Magnetic mesoporous silicon nanomaterials were prepared by solvothermal method, modified Stober method and poly (lactic acid) copolymers as template in formic acid solution. The magnetic mesoporous silicon nanomaterials were prepared by X-ray diffraction (XRD). Scanning electron microscope (SEM), transmission electron microscope (TEM), comprehensive physical property measurement system (PPMS). The magnetic mesoporous silicon nanomaterials were characterized by means of specific surface area and pore size distribution and their adsorption properties were studied. The magnetic mesoporous materials prepared in 0.2mol / L formic acid solution have a pore size of 8.2 nm, a specific surface area of 258m2 / g, and a pore volume of 0.32 cm ~ 3 / g. The saturation magnetization reached 53A 路m2 / kg. The magnetic mesoporous silicon nanomaterials have good adsorption capacity for bovine serum protein, neutral red, methylene blue and so on, and their saturated adsorption amounts are 53.6, respectively. The results show that the magnetic mesoporous silicon nanomaterials have a certain application prospect in the separation and enrichment of complex environmental samples.
【作者单位】：华东理工大学化学与分子工程学院上海市功能性材料化学重点实验室;青海大学化工学院;华东理工大学药学院上海市新药设计重点实验室;
【基金】：国家自然科学基金(81273481,81202493) 澳门科技大学开放基金(MUST-SKL-2016-06) 青海省科技厅自然基金(2016-ZJ-734)
【分类号】：TB383.1;TQ127.2
【正文快照】： 以介孔二氧化硅包覆的磁性纳米粒子具有良好生物相容性,其介孔结构使材料具有较大比表面积,磁性内核具有超顺磁性,在外磁场作用下有较好的磁响应性,广泛应用于催化剂载体、靶向载药、传感器及富集萃取等领域[1-2]。常用的磁性硅介孔材料的介孔外包覆层是以十六烷基三甲基溴化

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