Facile synthesis of mesoporous Si-containing γ-Al2O3 nanofiber with enhanced thermal stability
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- 作者：Fang Hu ; Yamin Wang ; Xiaoyong Lai ; Yusheng Wu…
- 关键词：Mesoporous γ ; Al2O3 ; Reverse precipitation ; Thermal stability ; Nanofiber
- 刊名：Chemical Research in Chinese Universities
- 出版年：2015
- 出版时间：February 2015
- 年：2015
- 卷：31
- 期：1
- 页码：156-159
- 全文大小：556 KB
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- 出版者：Springer Berlin Heidelberg
- ISSN：2210-3171
文摘
Mesoporous γ-Al2O3 nanofiber was prepared via a simple reverse precipitation route using Si-containing Al(OH)3 and HNO3 as raw materials. The resultant Si-containing mesoporous γ-Al2O3 nanofiber exhibited high surface area of 320 m2/g, large pore volume of 1.17 cm3/g and large pore size of 10.5 nm. The introduction of Si element remarkably enhanced the thermal stability of mesoporous γ-Al2O3. The as-prepared nanofiber could maintain relative high surface area(110 m2/g) and pore volume(0.73 cm3/g) up to 1100 °C. The effects of various experimental conditions, such as pH value, reaction temperature and aging temperature on the structural properties of the mesoporous γ-Al2O3 were also investigated.