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材料工程  2017, Vol. 45 Issue (2): 7-11    DOI: 10.11868/j.issn.1001-4381.2015.000780
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
高球形度、高比表面积SiO2/TiO2气凝胶小球的制备和表征
余煜玺, 朱孟伟
厦门大学 材料学院 材料科学与工程系 福建省特种先进材料重点实验室, 福建 厦门 361005
Preparation and Characterization of Highly Spherical Silica-titania Aerogel Beads with High Surface Area
YU Yu-xi, ZHU Meng-wei
Fujian Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, Fujian, China
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摘要 以正硅酸乙酯(TEOS)和钛酸丁酯(TBT)为共前驱体、乙醇为溶剂、乙酸和氨水为催化剂,采用快速溶胶-凝胶过程和超临界干燥制备得到SiO2/TiO2气凝胶小球。对SiO2/TiO2气凝胶小球进行SEM,TEM,XRD,FT-IR,TG-DTA和氮气吸附-脱附分析测试发现,SiO2/TiO2气凝胶小球粒径为1~8mm,平均粒径约为3.5mm,小球具有纳米多孔网络结构,比表面积高达914.5m2/g,TiO2颗粒均匀分布于气凝胶结构中,并在高温下保持锐钛矿晶型。
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余煜玺
朱孟伟
关键词 气凝胶小球SiO2/TiO2溶胶-凝胶超临界干燥    
Abstract:The silica-titania aerogel beads were synthesized through sol-gel reaction followed by supercritical drying, in which TEOS and TBT as co-precursors, EtOH as solvents, HAC and NH3·H2O as catalysts. The as-prepared aerogel beads were characterized by SEM,TEM,XRD,FT-IR,TG-DTA and nitrogen adsorption-desorption. The results indicate that the diameter distribution of beads are between 1-8mm, the average diameter of beads is 3.5mm. The aerogel beads have nanoporous network structure with high specific surface area of 914.5m2/g, and the TiO2 particles are distributed in the aerogel uniformly, which keep the anatase crystal under high temperature.
Key wordsaerogel bead    silica-titania    sol-gel    supercritical drying
收稿日期: 2015-06-17      出版日期: 2017-02-23
中图分类号:  TB33  
通讯作者: 余煜玺(1974-),男,教授,博士,从事极端环境应用的材料与器件以及气凝胶材料制备与应用研究,联系地址:福建省厦门市厦门大学材料学院(361005),yu_heart@xmu.edu.cn     E-mail: yu_heart@xmu.edu.cn
引用本文:   
余煜玺, 朱孟伟. 高球形度、高比表面积SiO2/TiO2气凝胶小球的制备和表征[J]. 材料工程, 2017, 45(2): 7-11.
YU Yu-xi, ZHU Meng-wei. Preparation and Characterization of Highly Spherical Silica-titania Aerogel Beads with High Surface Area. Journal of Materials Engineering, 2017, 45(2): 7-11.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.000780      或      http://jme.biam.ac.cn/CN/Y2017/V45/I2/7
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