Al2O3/Fe2O3 Mesoporous Composite Prepared with Activated Carbon Template in Supercritical Carbon Dioxide
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- 作者：Haijuan Fan ; Qun Xu ; Yiqun Guo ; and Yanxia Cao
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2006
- 出版时间：July 5, 2006
- 年：2006
- 卷：45
- 期：14
- 页码：5009 - 5012
- 全文大小：372K
- 年卷期：v.45,no.14(July 5, 2006)
- ISSN：1520-5045
文摘
A Al2O3/Fe2O3 mesoporous composite has been prepared with a nanoscale casting process using activatedcarbon as template in supercritical carbon dioxide (SC CO2). The composite precursor of iron(III)acetylacetonate (Fe(acac)3) and aluminum acetylacetonate (Al(acac)3) and acetone were dissolved in supercriticalCO2 and then coated on activated carbon in the desired supercritical conditions. After removal of activatedcarbon template by calcination in air at 600 
C, a Al2O3/Fe2O3 mesoporous composite was obtained.Temperature, pressure, and composite precursor ratio effects were studied. X-ray diffraction pattern provedthat the product was composed of 
-Al2O3 and 
-Fe2O3. Dendritic nanocrystals were observed from TEMgraphs. SEM results show that the porous structure of activated carbon template was well replicated bycomposite product. The product pore structure information was calculated from the nitrogen sorption isotherms.
C, a Al2O3/Fe2O3 mesoporous composite was obtained.Temperature, pressure, and composite precursor ratio effects were studied. X-ray diffraction pattern provedthat the product was composed of -Al2O3 and -Fe2O3. Dendritic nanocrystals were observed from TEMgraphs. SEM results show that the porous structure of activated carbon template was well replicated bycomposite product. The product pore structure information was calculated from the nitrogen sorption isotherms.