内部带有可移动二氧化硅球体的中空二氧化钛球体。

Hollow titania spheres with movable silica spheres inside.

作者信息

Zhang Kai, Zhang Xuehai, Chen Haitao, Chen Xin, Zheng Linli, Zhang Junhu, Yang Bai

机构信息

Key Lab of Supramolecular Structure & Materials, College of Chemistry, Jilin University, 10 # Qianwei Road, Changchun, People's Republic of China.

出版信息

Langmuir. 2004 Dec 21;20(26):11312-4. doi: 10.1021/la047736k.

DOI:10.1021/la047736k

PMID:15595751

Abstract

We demonstrate a flexible method for preparing hollow TiO2 nanospheres with movable silica nanoparticles inside (HTNMSNs). In this method, we used monodisperse silica--polystyrene core--shell nanospheres (SiO2-PS-CSNs) sulfonated as templates and prepared the composite shell consisting of TiO2 and sulfonated polystyrene (SPS) through adsorbing or depositing tetrabutyl titanate gel into the SPS shell. Finally the HTNMSNs were obtained after removal of all polymers in the composite nanospheres by dissolution or calcinations. We investigated the dependence of the morphologies of HTNMSNs on the thickness of PS shells and the size of SiO2 cores and prepared rare earth doped HTNMSNs by a sol-gel process.

摘要

我们展示了一种制备内部含有可移动二氧化硅纳米颗粒的中空二氧化钛纳米球（HTNMSNs）的灵活方法。在该方法中，我们使用磺化的单分散二氧化硅 - 聚苯乙烯核 - 壳纳米球（SiO2 - PS - CSNs）作为模板，并通过将钛酸四丁酯凝胶吸附或沉积到磺化聚苯乙烯（SPS）壳中来制备由二氧化钛和磺化聚苯乙烯组成的复合壳。最后，通过溶解或煅烧去除复合纳米球中的所有聚合物后获得了HTNMSNs。我们研究了HTNMSNs的形态对PS壳厚度和SiO2核尺寸的依赖性，并通过溶胶 - 凝胶法制备了稀土掺杂的HTNMSNs。