Repeated Synthesis of MCM-48 Microspheres with a Fixed Ethanol-to-Water Ratio

Lu Lu Qin; Hui Zhao; Hai Xia Wang; Shi Quan Liu

doi:10.4028/www.scientific.net/AMR.306-307.1420

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 306-307Repeated Synthesis of MCM-48 Microspheres with a...

Repeated Synthesis of MCM-48 Microspheres with a Fixed Ethanol-to-Water Ratio

Abstract:

MCM-48 microspheres have been repeatedly synthesized in cetyltrimethylammonium bromide-tetraethylorthosilicate-ammonia solution-water media with a fixed alcohol-to-water molar ratio of 0.15 by increasing the amounts of water and ethanol simultaneously. The cubic ordered pore arrangement is proved by the XRD and TEM measurements. Experiments show that the sole increase in either the ethanol or water addition would result in the formation of MCM-41 mesophase. The results indicate that the alcohol-to-water molar ratio is an important factor for controlling the formation of MCM-48 microspheres. The mechanism is primarily discussed.

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Periodical:

Advanced Materials Research (Volumes 306-307)

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1420-1424

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https://doi.org/10.4028/www.scientific.net/AMR.306-307.1420

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Online since:

August 2011

Authors:

Lu Lu Qin, Hui Zhao, Hai Xia Wang, Shi Quan Liu

Keywords:

MCM-48, Mesoporous Silica, Micro-Sphere

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