【摘要】 采用共沉淀法,合成了由两亲性嵌段共聚物聚（苯乙烯）-b-聚（甲基丙烯酸聚乙二醇酯）（PSt-bPMAPEG）修饰的Fe₃O₄-聚合物复合纳米粒子。以十六烷基三甲基溴化铵（CTAB）为模板剂,正硅酸乙酯（TEOS）为硅源,N-（2-氨乙基）-3-氨丙基三甲氧基硅烷（AAPTS）为功能化试剂,制备了氨基功能化介孔材料Fe₃O₄/SiO₂-NH2。采用X射线衍射（XRD）,傅里叶变换红外光谱（FT-IR）,透射电子显微镜（TEM）,N₂吸附/脱附等手段对Fe₃O₄/SiO₂-NH2进行了表征。结果表明,成功制备粒径约为50nm,孔径分别为3.3nm和42.9nm的Fe₃O₄/SiO₂介孔粒子。将磁性材料对水中酸性品红进行吸附性能研究,探讨了Fe₃O₄/SiO₂-NH2对染料酸性品红的吸附效率。结果表明:Fe₃O₄/SiO₂-NH2的用量为10mg,吸附时间为3.5min,溶液起始浓度为0.25mmol·L-1时吸附率达93.32%。更多还原

【Abstract】 Amphiphilic block copolymer poly（ styrene）-block-poly（ Polyethylene glycol methyl acrylate）（ PSt-b-PMAPEG） modified Fe₃O₄ magnetic nanoparticles were prepared by co-precipitation method.Amino-functionalized Fe₃O₄/ SiO₂-NH2 mesoporous materials were synthesized by a post-grafting method using? [1-（ 2-amino-ethyl）-3-aminopropyl]trimethoxysilane（ AAPTS） and tetraethyl orthosilicate（ TEOS） as a silica source,and CTAB as a structure directing agent.The as-synthesized materials were characterized by X-ray diffraction（ XRD）,Fourier-transform infrared spectroscopy（ FT-IR）,transmission electron microscopy（ TEM）,and N₂ adsorption / desorption isotherms.Characterization revealed that we successful prepared Fe₃O₄/ SiO₂ mesoporous particle,and its diameter size was about 50 nm,it also have mesoporous size of 3. 3 nm and 42. 9 nm,respectively.Adsorption performance was studied by the acid fuchsin in water,and discusses the dye adsorption efficiency of the sample. The results show that the adsorption rate was93. 32%,when Fe₃O₄/ SiO₂-NH2 dosage was 10 mg,adsorption time was 3. 5 min,initial concentration of 0. 25mmol·L-1.更多还原