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In situ assembly of zeolite nanocrystals into mesoporous aggregate with single-crystal-like morphology without secondary template

Authors Fan, Yunming
Hu, Haoquan HKUST affiliated (currently or previously)
Chen, Guohua View this author's profile
Issue Date 2008
Source Chemistry of materials , v. 20, (5), 2008, MAR 11, p. 1670-1672
Summary The formation of zeolite crystal its subsequent assembly into a mesoporous aggregate by enhancing the zeolite nucleation rate was demonstrated. ZSM-12 was selected that has micropores that are slightly larger and during the synthesis of ZSM-12 crystals and a mesoporous aggregate of ZSM-12 nanocrystals with a morphology similar to common ZSM-12 was obtained. The hydrothermal stability of ZSM-12 was tested by refluxing in boiling water for 120 hours with a sample-to-water ratio of 1:10 and by increasing the crystallization time to 8 days. The meso- and microstructure of mesoporous ZSM-12 was found to be stable during the treatments that was confirmed by powder X-ray diffraction images and scanning electron microscopy. The results indicate that the mesoporous ZSM-12 is highly hydrothermally stable that is important for the industrial catalytic applications.
ISSN 0897-4756
Language English
Format Article
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