中文摘要：

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。

英文摘要：

A n ew mag n e t ic me so p o ro u s silica nano ma te r ia l was sy n th e s iz ed by usin g imp ro v ed S to b e r and solvothermal methods wi th formic acid solut ion as acidic medium and PEG-PLA as template. X-ray dif fract ion （XRD）,field emission scanning electron microscopy （ FE-SEM）,t ransmiss ion electron microscopy （TEM）,physical proper ty measurement sys tem （PPMS）,and specific surface area and pore size dist r ibut ion measur ing inst rument were applied to character ize this mater ial . The resul ts showed that the magnet ic mesoporous silica nano mater ial which was synthes ized in 0. 2 mol /L formic acid solut ion had 8. 2 nm of pore cavi t ies,258 m2/g 〇 f su rface a r e a ,0 . 32 cm3/ g 〇 f pore volume an d 53 A ？ m 2/k g of s a tu ra t io n magnet izat ion. This magnet ic mesoporous silica nano mater ial had favorable adsorpt ion capacity of bovine serumalbumin, toluylene red and methylene blue wi th 53. 6,24. 1,66. 8 mg/g respect ively,which indicatedi t had cer tain applicat ion prospect in the separat ion and enr ichment complex aspects of environmental samples.