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目的合成介孔材料MCM-41-(CH_2)_3NH_2-EDTP,并初步研究其对水中铜离子吸附性能。方法以硅酸钠作为硅源,十六烷基三甲基溴化铵(CTAB)作为结构模板剂,在碱性条件下,利用水热法合成了纯硅源的MCM-41介孔分子筛。用3-氨丙基三乙氧基硅烷(APTES)和正硅酸乙酯(TEOS)对MCM-41介孔分子筛进行功能化修饰,成功得到了氨丙基修饰的MCM-41。将其与乙二胺四丙酸(EDTP)反应制得了MCM-41-(CH_2)_3NH_2-EDTP。采用X射线粉末衍射(XRD)和傅里叶红外光谱(FT-IR)表征手段对合成的新型功能化介孔材料进行表征。结果结果表明,MCM-41-(CH_2)_3NH_2-EDTP成功合成,乙二胺四丙酸改性的MCM-41对铜离子的吸附量明显高于纯MCM-41的吸附量。结论乙二胺四丙酸的成功嫁接使介孔材料在吸附性方面有很大提高,在水安全检测方面有很好的应用前景。
Aim To synthesize mesoporous MCM-41- (CH_2) _3NH_2-EDTP and study its adsorption properties on Cu2 + in water. Methods Pure silica source MCM-41 mesoporous molecular sieve was synthesized by hydrothermal method using sodium silicate as a silicon source and cetyltrimethylammonium bromide (CTAB) as a structural template. MCM-41 mesoporous molecular sieve was functionalized with 3-aminopropyltriethoxysilane (APTES) and tetraethylorthosilicate (TEOS), and aminopropyl modified MCM-41 was successfully obtained. MCM-41- (CH_2) _3NH_2-EDTP was prepared by the reaction of ethylenediaminetetrapropionic acid (EDTP). The synthesized novel functionalized mesoporous materials were characterized by X-ray powder diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The results show that MCM-41- (CH_2) _3NH_2-EDTP successfully synthesized, ethylenediaminetetrapropionic acid modified MCM-41 adsorption of copper ions was significantly higher than pure MCM-41 adsorption capacity. Conclusion The successful grafting of ethylenediaminetetrapropionic acid has greatly improved the adsorption of mesoporous materials and has good application prospects in water safety testing.