Rapid and Effective Way to Synthesize Highly Crystalline Nanosized SAPO-34 Particles
Full article
| Common |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Nanomaterials
, E-ISSN: 2079-4991
|
| Output data |
Year: 2022,
Volume: 12,
Number: 22,
Article number
: 4086,
Pages count
: 14
DOI:
10.3390/nano12224086
|
| Tags |
SAPO-34; dry gel conversion; steam-assisted crystallization; nanocrystals; coated adsorber |
| Authors |
Shamanaeva Irina
1
,
Strelova Svetlana
1
,
Solovyeva Marina
1
,
Grekova Aleksandra
1
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave., 5, 630090 Novosibirsk, Russia
|
|
Funding (1)
|
1
|
Russian Science Foundation
|
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.