Monodisperse hollow TiO2 spheres for thermal insulation materials: Template-free synthesis, characterization and properties

被引：32
作者：
Bao, Yan [1 ,2 ,3 ]
Kang, Qiao Ling [1 ]
Ma, Jian Zhong [1 ,2 ]
Liu, Chao [4 ]
机构：
[1] Shaanxi Univ Sci & Technol, Coll Bioresources Chem & Mat Engn, Xian 710021, Peoples R China
[2] Shaanxi Res Inst Agr Prod Proc Technol, Xian 710021, Peoples R China
[3] Shaanxi Univ Sci & Technol, Natl Demonstrat Ctr Expt Light Chem Engn Educ, Xian 710021, Peoples R China
[4] Shaanxi Univ Sci & Technol, Shaanxi Collaborat Innovat Ctr Ind Auxiliary Chem, Xian 710021, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2017年 / 43卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Hollow TiO2 spheres; Template-free solvothermal route; Thermal insulation; Reflection performance; ANATASE; SILICA; BEADS; NANOSTRUCTURES; PHOTOCATALYST; NANOPARTICLES; MICROSPHERES; NANOCAPSULES; FABRICATION;
D O I：
10.1016/j.ceramint.2017.03.155
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Hollow TiO2 spheres were easily fabricated through a template-free solvothermal route only using tetrabutyl titanate (TBT) as raw material and absolute ethanol as solvent. The morphology of hollow TiO2 spheres was successfully controlled by adjusting the reaction time and reaction temperature. The formation process of hollow TiO2 spheres includes three steps based on the experimental results: the hydrolysis of TBT to produce Ti(OH)(4) clusters in water formed from an ethanol etherification reaction under high temperature and high pressure, the assembly of Ti(OH)(4) clusters into solid spheres, and the transformation of solid TiO2 spheres into hollow TiO2 spheres. Furthermore, the as-prepared hollow TiO2 spheres exhibited good thermal insulation performance including heat barrier and heat reflection.
引用
收藏
页码：8596 / 8602
页数：7
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