Preparation and Properties of Sodalite-Type Aluminophosphates Containing Silicon, Cobalt and Zinc
Апстракт
The SAPO, MeAPO and MeSAPO microporous materials (Me=Co2+ and/or 2n2+) having a sodalite structure have been obtained hydrothermally at 200°C in the presence of tetramethylammonium ion as the template. The SAPO and MeSAPO products prepared at lower template concentrations are formed through a partial replacement of both aluminium and phosphorus by silicon in the parent aluminophosphate lattice; at higher pH only phosphorus is replaced. While the Me2+ ions are in all cases constituents of the framework, most zinc-containing materials have a fraction of the Zn2+ ions located in the cavities. T.g.a . shows that complete removal of the trapped organic component can not be easily accomplished. This can be explained by the small size of the openings in the sodalite cages. Powder diffraction analysis shows that replacement of aluminium by silicon, cobalt and zinc, and phosphorus by silicon leads to an expansion of the parent aluminophosphate unit cell. Kinetic studies suggest that crystalliza...tion of the silicon-containing products is preceded by an induction period of about 2 h, the nucleation taking place both in the liquid and solid phase.
Извор:
Australian Journal of Chemistry, 1991, 44, 4, 543-553Издавач:
- CSIRO PUBLISHING
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Rajić, Nevenka AU - Stojaković, Djordje AU - Kaučič, Venčeslav PY - 1991 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5056 AB - The SAPO, MeAPO and MeSAPO microporous materials (Me=Co2+ and/or 2n2+) having a sodalite structure have been obtained hydrothermally at 200°C in the presence of tetramethylammonium ion as the template. The SAPO and MeSAPO products prepared at lower template concentrations are formed through a partial replacement of both aluminium and phosphorus by silicon in the parent aluminophosphate lattice; at higher pH only phosphorus is replaced. While the Me2+ ions are in all cases constituents of the framework, most zinc-containing materials have a fraction of the Zn2+ ions located in the cavities. T.g.a . shows that complete removal of the trapped organic component can not be easily accomplished. This can be explained by the small size of the openings in the sodalite cages. Powder diffraction analysis shows that replacement of aluminium by silicon, cobalt and zinc, and phosphorus by silicon leads to an expansion of the parent aluminophosphate unit cell. Kinetic studies suggest that crystallization of the silicon-containing products is preceded by an induction period of about 2 h, the nucleation taking place both in the liquid and solid phase. PB - CSIRO PUBLISHING T2 - Australian Journal of Chemistry T1 - Preparation and Properties of Sodalite-Type Aluminophosphates Containing Silicon, Cobalt and Zinc EP - 553 IS - 4 SP - 543 VL - 44 DO - 10.1071/CH9910543 ER -
@article{ author = "Rajić, Nevenka and Stojaković, Djordje and Kaučič, Venčeslav", year = "1991", abstract = "The SAPO, MeAPO and MeSAPO microporous materials (Me=Co2+ and/or 2n2+) having a sodalite structure have been obtained hydrothermally at 200°C in the presence of tetramethylammonium ion as the template. The SAPO and MeSAPO products prepared at lower template concentrations are formed through a partial replacement of both aluminium and phosphorus by silicon in the parent aluminophosphate lattice; at higher pH only phosphorus is replaced. While the Me2+ ions are in all cases constituents of the framework, most zinc-containing materials have a fraction of the Zn2+ ions located in the cavities. T.g.a . shows that complete removal of the trapped organic component can not be easily accomplished. This can be explained by the small size of the openings in the sodalite cages. Powder diffraction analysis shows that replacement of aluminium by silicon, cobalt and zinc, and phosphorus by silicon leads to an expansion of the parent aluminophosphate unit cell. Kinetic studies suggest that crystallization of the silicon-containing products is preceded by an induction period of about 2 h, the nucleation taking place both in the liquid and solid phase.", publisher = "CSIRO PUBLISHING", journal = "Australian Journal of Chemistry", title = "Preparation and Properties of Sodalite-Type Aluminophosphates Containing Silicon, Cobalt and Zinc", pages = "553-543", number = "4", volume = "44", doi = "10.1071/CH9910543" }
Rajić, N., Stojaković, D.,& Kaučič, V.. (1991). Preparation and Properties of Sodalite-Type Aluminophosphates Containing Silicon, Cobalt and Zinc. in Australian Journal of Chemistry CSIRO PUBLISHING., 44(4), 543-553. https://doi.org/10.1071/CH9910543
Rajić N, Stojaković D, Kaučič V. Preparation and Properties of Sodalite-Type Aluminophosphates Containing Silicon, Cobalt and Zinc. in Australian Journal of Chemistry. 1991;44(4):543-553. doi:10.1071/CH9910543 .
Rajić, Nevenka, Stojaković, Djordje, Kaučič, Venčeslav, "Preparation and Properties of Sodalite-Type Aluminophosphates Containing Silicon, Cobalt and Zinc" in Australian Journal of Chemistry, 44, no. 4 (1991):543-553, https://doi.org/10.1071/CH9910543 . .