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Synthesis and characterization of hierarchically structured aluminosilicates
Journal of Materials Chemistry
  • Sikander H. Hakim, Iowa State University
  • Brent H. Shanks, Iowa State University
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Catalytically active aluminosilicate materials with hierarchical porous structures are produced. A spontaneous self-assembly in aqueous solution starting from component alkoxides resulted in patterned powders without the aid of any templating agent. SEM and N2 adsorption-desorption studies demonstrated regular array of macrochannels connected with micro-mesoporous walls. FTIR of adsorbed pyridine revealed the presence of both Brønsted and Lewis acid sites. Although the synthesis procedure is markedly distinct from sol-gel phenomena, the structure and acidity in the final materials could be manipulated in terms of sol-gel parameters such as composition, pH, temperature, and addition order. Not one parameter set could be identified to provide both best structure and maximum acidity; a compromise between the two was essential. The synthesized aluminosilicate catalysts were active in the esterification reaction of palmitic acid.

This article is from Journal of Materials Chemistry 21 (2011): 7364, doi: 10.1039/c1jm10176e. Posted with permission.

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The Royal Society of Chemistry
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Sikander H. Hakim and Brent H. Shanks. "Synthesis and characterization of hierarchically structured aluminosilicates" Journal of Materials Chemistry Vol. 21 Iss. 20 (2011) p. 7364 - 7375
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