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1、无机空心球的制备方法,组员:刘 琴 赵天行 朱治祥 闫文浩 陈 实 李怀瑞,目录,一 引言,二 制备方法,1.硬模板法,碳纳米球做模板,表面修饰羟基化,利于吸附铅,Pb吸附在碳球表面,TEOS为硅源,CTAB为软模板,形成一薄层介孔二氧化硅,煅烧去碳和CTAB,剩下内壁附着有Pb的SiO2的空心球,Chem Comm,2010,65246526,2.软模板法,Adv.Funct.Mater.2007.17,18141820,3.牺牲模板法Kirkendall效应,柯肯达尔效应(kirkendall effect)原来是指两种扩散速率不同的金属在扩散过程中会形成缺陷,现已 成为中空纳米颗粒的一种
2、制备方法。,Science.2004,304,711-714.,Angew.Chem.Int.Ed.2007,46,4155 4158,4.无模板法Ostwald熟化机制,熟化机制:由于实心球内部颗粒具有较高的表面能和较大的曲率,使其与球外层颗粒相比有较大的溶解度,内部的粒子逐渐向外溶解,空腔部分逐渐形成,最终形成完好的中空球。,Chem.Commun,2009,70427044.,三 各种制备方法的比较,四 参考文献,Jing Hu,Min Chen,Xiaosheng Fang and Limin Wu.Fabrication and application of inorganic ho
3、llow spheres.Chem.Soc.Rev.2011,5472-5491 Zhe Chen,Zhi-Min Cui,Fang Niu,Lei Jiang and Wei-Guo Song.Pd nanoparticles in silica hollow spheres with mesoporous walls:a nanoreactor with extremely high activity.ChemComm,2010,65246526Huai-Ping Cong,Shu-Hong Yu.Hybrid ZnO-Dye Hollow Spheres with New Optical
4、 Properties from a Self-Assembly Process Based on Evans Blue Dye and Cetyltrimethylammonium Bromide Adv.Funct.Mater.2007.17,18141820Sheng Peng,Shouheng Sun.Synthesis and Characterization of Monodisperse Hollow Fe3O4 Nanoparticles.Angew.Chem.Int.Ed.2007,46,4155 4158Seongho Jeon,Kijung Yong.A novel composite hierarchical hollow structure:one-pot synthesis and magnetic properties of W18O49WO2 hollow nanourchins.Chem.Commun,2009,70427044.,