title: High-yield nanosized (Si)AlPO-41 using ethanol polarity equalization and co-templating synthesis approach.
abstract: Control of the crystallite dimensions of the microporous aluminophosphate AlPO-41 (AFO-type framework structure), and the Si-containing analogue SAPO-41, was attained down to the nanometer scale under stable hydrothermal conditions. The combined application of a tetraalkylammonium co-template (tetrapentylammonium hydroxide) along with an amine structure directing agent (n-dipropylamine) stabilized through the use of ethanol in the initial suspension enables a crystallization medium, which remains homogeneous throughout the entire synthesis. As a direct consequence of the optimized homogeneity of the suspension, the AFO-type microporous nanocrystals (AlPO-41 and SAPO-41) with a size in the range of 30-500 nm with yields surpassing 50% are obtained. The feasibility to obtain nanosized AlPO-41 and SAPO-41 crystals using ethanol as a polarity equalizing agent, resulting in a scalable hydrothermal synthesis from non-colloidal starting mixtures without the use of other assisting methods, is presented.
authors.affiliation: Laboratoire Catalyse & Spectrochimie, ENSICAEN - Université de Caen - CNRS, 6 boulevard du Maréchal Juin, 14050 Caen, France. mintova@ensicaen.fr.
authors.forename: Gerardo
authors.initials: G
authors.lastname: Majano
authors.forename: Kolio
authors.initials: K
authors.lastname: Raltchev
authors.forename: Aurelie
authors.initials: A
authors.lastname: Vicente
authors.forename: Svetlana
authors.initials: S
authors.lastname: Mintova