Disintegration of mesoporous structures of MCM-41 and MCM-48 in water

被引：0
|
作者：
Kim, JM
Ryoo, R
机构：
[1] KOREA ADV INST SCI & TECHNOL,DEPT CHEM,TAEJON 305701,SOUTH KOREA
[2] KOREA ADV INST SCI & TECHNOL,CTR MOLEC SCI,TAEJON 305701,SOUTH KOREA
来源：
BULLETIN OF THE KOREAN CHEMICAL SOCIETY | 1996年 / 17卷 / 01期
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D O I：
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中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
It has been found that mesoporous structures of MCM-41 and MCM-48 disintegrate readily in distilled water around 370 K, while the structures can be stable in 100%-steam of 1 atmospheric pressure at much higher temperatures around 820 K. Thus, the structure disintegration is thermodynamically more favorable in water than under the steaming condition. X-ray powder diffraction and magic angle spinning Si-29 NMR spectroscopy indicate that the disintegration of the mesoporous structures in water occurs due to silicate hydrolysis.
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页码：66 / 68
页数：3
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