Synthesis of magnetic core–shell structure Fe_3O_4@MCM-41 nanoparticle by vesicles in aqueous solutions  

囊泡相合成磁性Fe_3O_4@MCM-41纳米晶（英文）

作　　者：宋伟明 刘雪松 杨颖 韩雪佳 邓启刚 

机构地区：[1]College of Chemistry and Chemical Engineering of Qiqihar University

出　　处：《Chinese Journal of Chemical Engineering》2015年第8期1398-1402,共5页中国化学工程学报（英文版）

基　　金：Supported by the Natural Science Foundation of Heilongjiang Province(B201010);the Education Department of Heilongjiang Province(12511595)

摘　　要：In this study, magnetic core–shell structure Fe3O4@MCM-41 nanoparticles were synthesized with vesicles as soft templates. In the preparation, Fe Cl2 and tetraethy orthosilicate(TEOS) were selected as Fe processor and Si precursor, respectively. Stable vesicles first formed in 0.03 mol·L-11:2 mixture of anionic surfactant sodium dodecyl sulfate and cationic surfactant cetyltrimethyl ammonium bromide. Then, TEOS was added in the vesicle aqueous solution, leading to a highly dispersed solution. After high-temperature calcination, Fe3O4@MCM-41 nanoparticles were obtained. Their structure and morphology were characterized by Saturn Digisizer, transmission electron microscope and vibrating sample magneto-meter. The results indicate that the vesicles are spherical and their size could be tuned between 20 and 50 nm. The average grain diameter of synthesize magnetic core–shell Fe3O4@MCM-41 particles is 100–150 nm and most of them are in elliptical shape. The dispersion of magnetic particles is very good and magnetization values are up to 33.44 emu·g-1, which are superior to that of other Fe3O4 materials reported.In this study, magnetic core–shell structure Fe3O4@MCM-41 nanoparticles were synthesized with vesicles as soft templates. In the preparation, Fe Cl2 and tetraethy orthosilicate（TEOS） were selected as Fe processor and Si precursor, respectively. Stable vesicles first formed in 0.03 mol·L-11：2 mixture of anionic surfactant sodium dodecyl sulfate and cationic surfactant cetyltrimethyl ammonium bromide. Then, TEOS was added in the vesicle aqueous solution, leading to a highly dispersed solution. After high-temperature calcination, Fe3O4@MCM-41 nanoparticles were obtained. Their structure and morphology were characterized by Saturn Digisizer, transmission electron microscope and vibrating sample magneto-meter. The results indicate that the vesicles are spherical and their size could be tuned between 20 and 50 nm. The average grain diameter of synthesize magnetic core–shell Fe3O4@MCM-41 particles is 100–150 nm and most of them are in elliptical shape. The dispersion of magnetic particles is very good and magnetization values are up to 33.44 emu·g-1, which are superior to that of other Fe3O4 materials reported.

关 键 词：Fe3O4@MCM-41 Core–shell Nanoparticles 

分 类 号：TB383.1[一般工业技术—材料科学与工程]