Meso/macroporous AlPO-5 spherical macrostructures tailored by resin templating

Effect of synthesis parameters on mesoporous SAPO-5 with AFI-type formation via microwave radiation using alumatrane and silatrane precursors

“…Owing to the benefits from the combination of mesoporous molecular sieves and zeolites [1][2][3], mesoporous zeotype, AlPO 4 -5, has recently been studied and synthesized [2,4]. The AlPO 4 -5 zeotype with an AFI-type molecular sieve, having unidimensional 12-membered rings of straight channels, exhibits excellent thermal stability and is widely used in catalysis, separation [5], membranes, sensors, and nonlinear optics [6].…”

“…Mesoporous materials related to AlPO 4 and SAPO have extensively been synthesized [23][24][25][26]. As reported [1][2][3], mesoporous zeolite and zeotype (such as BEA, MEL, CHA, MFI, and AFI) have been successfully prepared. From our previous works of mesoporous AlPO 4 -5 [4] synthesized using alumatrane [27], and silatrane [28] precursors, SAPO-5 has thus been further studied and synthesized in this work using these precursors and TEA as a structuredirecting agent under microwave radiation.…”

Hierarchically‐Ordered Zeolites: A Critical Assessment

“…Different types of materials are preferentially been used as hard templates. The major groups are carbonaceous materials (e.g., carbon fibers, [ 128 ] particles, [ 126 ] nanotubes, [ 129,130 ] or aerogels [ 131 ] ), biological templates (e.g., starch, [ 132 ] bacteria, [ 133 ] wood, [ 18,19,134 ] bread [ 135 ] ), polymeric templates (e.g., polystyrene, [ 85,136 ] polyurethane, [ 86,136 ] or resorcinol‐formaldehyde [ 137 ] ), and inorganic templates (e.g., silica nanoparticles [ 75 ] or calcium carbonate particles. [ 81 ] The hard templates (solid porogens) should fulfil the following requirements: i) the surface properties should match with the chemical properties of the used reactants, ii) they should be stable at the synthesis temperature, and iii) the remaining zeolite fraction should be stable after removal of the hard template.…”

Synthesis of hierarchical AlPO-n molecular sieves templated by saccharides

“…Al precursor species were loaded on a cation exchange resin as the Al source. Finally, AlPO-5 macrospheres with micrometer-sized voids and cavities were obtained after removal of the resin [26]. Utchariyajit and Wongkasemjit prepared mesoporous AlPO-5 with the pore size distribution (PSD) of 10-100 nm using alumatrane as precursor under microwave radiation [27].…”