Effects of Synthesis Parameters on the Crystallization and Morphological Profiles of SAPO-5 Templated by 1-Benzyl-2,3dimethyl-1H-imidazol-3-ium Hydroxide

International audience; The formation of SAPO-5 molecular sieves is investigated under hydrothermal conditions and templated by a new structure-directing agent, 1-benzyl-2,3-dimethyl-1H-imidazol-3-ium hydroxide ([Bzm]OH). The synthesis was carried out by tuning the synthesis parameters, viz. crystallization temperature, heating time and reactants molar composition (SiO 2 , Al 2 O 3 , P 2 O 5 , [Bzm] + , H 2 O) so as to study the roles of each synthesis parameter towards the formation of SAPO-5. The results showed that these synthesis parameters had significant influences on the entire crystallization process (induction, nucleation, crystal growth, and Ostwald ripening) and physicochemical properties of SAPO-5 (morphology and crystal size). Moreover, this study also demonstrated a fast hydrothermal synthesis approach where SAPO-5 molecular sieve with hexagonal prism morphology could be crystallized within 10 h instead of days using novel [Bzm]OH heterocyclic template thus offering an alternative route for synthesizing zeolite-like materials for advanced applications.