Preparation of submicrometer-sized titania hollow spheres by templating sulfonated polystyrene latex particles
Preparation of submicrometer-sized titania hollow spheres by templating sulfonated polystyrene latex particles
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DOI：
10.1016/j.matlet.2006.07.081
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发表时间：
2007-03
影响因子：
3
通讯作者：
A. Syoufian;Y. Inoue;M. Yada;K. Nakashima
中科院分区：
文献类型：
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作者：
A. Syoufian;Y. Inoue;M. Yada;K. Nakashima
以磺化聚苯乙烯（PS）乳胶粒为模板，采用溶胶-凝胶法成功合成了壳层厚度可调、表面光滑的亚微米级二氧化钛空心球。用扫描电子显微镜和透射电子显微镜对粒子的结构进行了表征。壳的厚度很容易调整，通过改变四丁氧基钛（TBOT）在乙醇溶液中的浓度。随着TBOT浓度的增加，表面粗糙度和壳层厚度有增加的趋势。空心球的直径平均比模板PS胶乳颗粒的直径小20-26%。对于具有最高TBOT浓度的样品，也观察到一些二氧化钛碎片。
Submicrometer-sized titania hollow spheres with tunable shell thickness and smooth surfaces have been successfully synthesized by employing sulfonated polystyrene (PS) latex particles as a template in sol–gel method. The structure of the particles was characterized by scanning electron microscopy and transmission electron microscopy. The shell thickness was readily tuned by altering the concentration of titanium tetrabutoxide (TBOT) in ethanol solutions. The surface roughness as well as the shell thickness has the tendency to increase with the increase in the concentration of TBOT. The diameter of the hollow spheres was on the average of 20–26% smaller than the diameter of template PS latex particles. Some titania fragments were also observed for the sample with the highest TBOT concentration.