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大比表面积TiO2纳米片空心微球的水热制备研究
作者:杨玉娇1 王啸2 王刚1 林红1 2 
单位:1 青海大学机械工程学院 西宁810016 2 清华大学材料学院 新型陶瓷与精细工艺国家重点实验室 北京100084 
关键词:TiO2 纳米片空心球 比表面积 包覆 水热法 
分类号:
出版年,卷(期):页码:2014,42(10):0-0
DOI:
摘要:

摘要:常温下在SiO2纳米球表面包覆一层TiO2,通过碱性水热法移除SiO2纳米球后,被包覆的微球转变成由纳米片组成的TiO2空心微球。采用X射线衍射(XRD),扫描电镜(SEM),透射电镜(TEM)和氮气吸附-脱附装置对包覆微球和TiO2空心微球进行分析。结果表明,氨水和钛酸四丁酯的含量对包覆微球的形貌有重要影响,NaOH浓度也直接影响空心微球的形貌和比表面积。TiO2空心微球表面是由厚度仅为几个纳米,长度为100nm以上的纳米片组成,其晶体结构为锐钛矿相。TiO2 空心微球的比表面积高达185.7m2/g。

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Abstract:At room temperature, the surface of SiO2 nanospheres was coated by one layer of TiO2.  The coated mirospheres changed into TiO2 hollow microspheres composed by nanosheets after  SiO2 nanospheres were removed from the coated microspheres through alkaline hydrothermal method. The coated microspheres and TiO2 hollow microspheres were characterized by XRD, SEM, TEM and nitrogen adsorption-desorption apparatus. The results indicated that the amount of ammonia and tetrabutyl titanate had an important influence on the morphology of the coated microspheres and the concentration of NaOH affected the morphology and the surface area of the TiO2 hollow microspheres. The surface of TiO2 hollow microspheres were composed by TiO2 nanosheets with thickness of several nanometer and length of more than 100nm and the crystal form of TiO2 hollow microspheres were pure anatase. The specific surface area of the TiO2 hollow microspheres was up to 185.7m2/g.

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基金项目:
基金项目:国家自然科学基金;青海科技厅三江源项目(2010-N-S03)
作者简介:
杨玉娇,男,硕士研究生
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参考文献:

参考文献
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