首先通过化学共沉淀法制备出Fe3O4磁性纳米颗粒,考察了表面活性剂的用量、碱的用量、陈化时间以及三价铁与二价铁的摩尔比等因素对Fe3O4纳米颗粒性能的影响。制备出饱和磁化强度为73.85A.m2/kg、粒径大小为10nm以下的Fe3O4纳米颗粒。在此基础上,制备出Fe3O4/Au复合纳米颗粒,通过VSM、TEM、XRD、XPS对产物进行了表征,研究了HAuCl4的用量、还原剂的种类、硅烷偶联剂以及包金之前的Fe3O4纳米颗粒对复合颗粒的影响,结果表明所制得的Fe3O4/Au复合磁性纳米颗粒包覆良好,粒径大小为50～200nm,饱和磁化强度为10.08A.m2/kg。
The Fe3O4 magnetic nanoparticles were prepared by the method of chemical co-precipitation first,the effect factors of influencing the properties of magnetic nanoparticles,such as precipitator selection,the quantity of precipitator and the way of addition,aging time,quantity of surfactant and Fe2＋/Fe3＋ molar ratio were studied by authors.The saturation magnetization of prepared Fe3O4 magnetic nanoparticles is 73.85A·m2/kg,and the particle diameter is below 10nm.Then,the Fe3O4/Au composite nanoparticles were prepared and characterized by VSM,TEM,XRD,XPS means.The authors studied the influence of the amount of HAuCl4,the kind of reducing agent,silane coupling agent,as well as Fe3O4 nano-particles before coating Au on the properties of composite particles,the results show that the obtained Fe3O4/Au composite nanoparticles are well-coated,particle size is 50-200nm,saturation magnetization is 10.08A·m2/kg.
参考文献
| [1] | 张金升 .超细Fe<,3>O<,4>磁性液体的制备、表征和稳定机制研究[D].山东大学,2003. |
| [2] | 刘冰,王德平,黄文旵,周萘,姚爱华.核壳结构磁性复合纳米粒的制备及研究进展[J].材料导报,2007(z1):185-188. |
| [3] | 崔亚丽,惠文利,苏婧,王亚妮,陈超.Fe3O4/Au纳米复合粒子及其光学性质[J].中国科学B辑:化学,2005(02):89-93. |
| [4] | 刘祖黎,彭莉,姚凯伦,卢强华,汪汉斌.超小型Fe3O4/Au纳米复合微粒的制备与表征[J].功能材料,2005(02):196-199. |
| [5] | 何少蓉 .复合磁性粒子的制备及分析应用[D].重庆大学,2005. |
| [6] | Yu H;Chen M;Rice PM;Wang SX;White RL;Sun SH .Dumbbell-like bifunctional Au-Fe3O4 nanoparticles[J].Nano letters,2005(2):379-382. |
| [7] | 崔亚丽,张连营,苏婧,张彩峰,李琦,崔婷,金伯泉,陈超.组装型金磁微粒的制备及其在免疫学检测中的应用[J].中国科学B辑,2006(02):159-165. |
| [8] | 吴伟,贺全国,陈洪,汤建新,聂立波.Fe3O4磁性纳米粒子的超声包金及其表征[J].化学学报,2007(13):1273-1279. |
| [9] | Pham TTH;Cao C;Sim J .Application of citrate-stabilized gold-coated ferric oxide composite nanoparticles for biological separations[J].Journal of Magnetism and Magnetic Materials,2008(15):2049-2055. |
| [10] | 李建平,陈绪胄.基于Fe3O4/Au/GOx的新型磁性敏感膜葡萄糖传感器的研制[J].化学学报,2008(01):84-90. |
| [11] | 彭菊村,吴波英,陈杰.Fe3O4/Au磁性纳米复合微粒的制备及表征[J].稀有金属材料与工程,2008(03):504-508. |
| [12] | 王显祥,黄硕,单志,杨婉身.自组装制备Fe3O4@Au复合纳米粒子用于固定化葡萄糖氧化酶[J].科学通报,2009(04):430-435. |
| [13] | 崔亚丽,胡道道,房喻,马建标.核/壳型Fe3O4/Au超顺磁性微粒的制备及机理[J].中国科学B辑,2001(04):319-324. |
| [14] | 崔亚丽,惠文利,汪慧蓉,王利军,陈超.Fe3O4/Au复合微粒制备条件及性质研究[J].中国科学B辑,2003(06):482-488. |
| [15] | 王凯,杨光,龙华,李玉华,戴能利,陆培祥.金纳米颗粒的有序制备及其光学特性[J].物理学报,2008(06):3862-3867. |
| [16] | 吴青松 .金、银纳米颗粒及其纳米壳层的制备、形成机理与光学性能研究[D].东北大学,2006. |
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