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Facile Synthesis of VFI Molecular Sieve in the Presence of Triethylamine

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Abstract:

Aluminophosphate (AlPO) molecular sieve having extra-large pore (VFI structure with 18 membered rings) can be synthesized readily at 110 or 120 °C under microwave irradiation from a gel containing triethylamine (TEA) as a template or structure-directing agent. At high temperature of 130 °C, the VFI transforms into AFI with the increase of reaction time since the relative stability of VFI is less than that of AFI. Due to the rapid crystallization involved in the microwave method and instability of the porous material with extra-large pore (in this study, VFI structure), the material can be selectively synthesized only by microwave irradiation. The synthesized VFI from gel containing TEA is very stable that can be dried at 100–160 °C at atmospheric pressure without the phase-transformation into AlPO-8.

Keywords: ALUMINOPHOSPHATE; FACILE SYNTHESIS; LARGE PORE MOLECULAR SIEVE; MICROWAVE HEATING; PHASE TRANSITION; TRIETHYLAMINE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.1539

Publication date: January 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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