Abstract
Abstract We have characterized the intermediate phases of AlPO 4 -11 molecular sieve prepared by dry-gel conversion (DGC) method. The evolution of the gel phases as a function of crystallization time was studied by 31 P and 27 Al solid-state NMR techniques combined with powder X-ray diffraction (XRD) and FT-Raman spectroscopy. 17 O solid-state NMR spectroscopy was also applied to directly probe the involvement of water vapor in the crystallization.
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