Ordered, highly zeolitized mesoporous aluminosilicates produced by a gradient acidic assembly growth strategy in a mixed template system

Arepati Azhati, Songhai Xie, Weiwen Wang, Ahmed A. Elzatahry, Yueer Yan, Jian Zhou, Dhaifallah Al-Dhayan, Yahong Zhang, Yi Tang, Dongyuan Zhao

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)

Abstract

Tremendous efforts have been made in recent years to synthesize ordered mesoporous zeolite materials, because of the accelerating demands of industrial bulky molecule conversion. Here, we develop a novel gradient acidic assembly growth strategy to prepare ordered highly zeolitized mesoporous aluminosilicate (SBA-16) materials in a mixed template system. This gradient acidic assembly growth strategy can achieve the high zeolitization of mesoporous aluminosilicate walls without any ordering loss of the mesostructure. The resultant highly zeolitized mesoporous materials, composed of the intergrown zeolite subcrystal particles (2-3 nm), exhibit high surface area (∼834 m2 g-1) and pore volume (∼0.64 cm3 g-1), typical channel of MFI framework (0.52 nm), and uniform mesopore (∼5.75 nm), respectively. Moreover, these highly ordered crystallized mesostructures endow them with high exposed active sites and excellent hydrothermal stability, which consequently make their catalytic activities in bulky molecule transformations at least 10 times higher than conventional zeolites or amorphous mesoporous materials. Without the use of any special surfactants, this general synthetic process provides a brand new view for the synthesis and application of highly crystalline ordered mesoporous materials.

Original languageEnglish
Pages (from-to)4859-4866
Number of pages8
JournalChemistry of Materials
Volume28
Issue number13
DOIs
Publication statusPublished - 12 Jul 2016
Externally publishedYes

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