Rapid and Effective Way to Synthesize Highly Crystalline Nanosized SAPO-34 Particles
Научная публикация
| Общая информация |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Nanomaterials
, E-ISSN: 2079-4991
|
| Вых. Данные |
Год: 2022,
Том: 12,
Номер: 22,
Номер статьи
: 4086,
Страниц
: 14
DOI:
10.3390/nano12224086
|
| Ключевые слова |
SAPO-34; dry gel conversion; steam-assisted crystallization; nanocrystals; coated adsorber |
| Авторы |
Shamanaeva Irina
1
,
Strelova Svetlana
1
,
Solovyeva Marina
1
,
Grekova Aleksandra
1
|
| Организации |
| 1 |
Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave., 5, 630090 Novosibirsk, Russia
|
|
Информация о финансировании (1)
|
1
|
Российский научный фонд
|
21-79-10183
|
SAPO-34 nanocrystals with sizes of 50–150 nm were obtained via steam-assisted crystallization (SAC) for 5 h at 200 °C from two types of aluminum precursors—aluminum isopropoxide and boehmite. A reaction mixture composition with a small amount of organic template tetraehylammonium hydroxide (TEAOH) was used with the molar ratio TEAOH/Al2O3 = 1/1. The alumina precursor type and duration of the SAC (5 and 24 h) on the crystal size, texture, and acid properties were investigated. The SAPO-34 nanocrystals that we obtained possess a large micropore volume of 0.22–0.24 cm3/g and a specific surface area of 651–695 m2/g. When the crystallization was prolonged for up to 24 h, a SAPO-18 structure appeared, but the micropore and mesopore volumes changed insignificantly. Using boehmite as the aluminum precursor led to higher mesoporosity of the material but a little bit lower acidity when compared with the samples prepared from aluminum isopropoxide. In addition, the method proposed was used for preparing a SAPO-34-coated aluminum adsorber heat exchanger. Thus, the synthesis method proposed is affordable and effective to prepare SAPO-34 highly crystalline nanoparticles, with no need for post-synthetic procedures as the mother liquor separation from nanocrystals.