The Study of Structural, Textural and Basic Properties of MgAl- and LiAl-LDH Prepared by Mechanochemical Method
Review
| Общее |
Language:
Английский,
Genre:
Review,
Status:
Published,
Source type:
Original
|
| Journal |
Catalysis Today
ISSN: 0920-5861
, E-ISSN: 1873-4308
|
| Output data |
Year: 2020,
Volume: 357,
Pages: 638-645
Pages count
: 8
DOI:
10.1016/j.cattod.2019.04.069
|
| Tags |
Basic properties; Mechanochemical method; Mg(Li) Al-layered double hydroxides; Textural properties |
| Authors |
Stepanova L.N.
1
,
Belskaya O.B.
1,2
,
Vasilevich А.V.
1
,
Gulyaeva T.I.
1
,
Leont'eva N.N.
1
,
Serkova А.N.
3
,
Salanov А.N.
3
,
Likholobov V.А.
3
|
| Affiliations |
| 1 |
Center of New Chemical Technologies BIC, Neftezavodskaya Str., 54, Omsk, 644040, Russian Federation
|
| 2 |
Omsk State Technical University, Mira Ave., 11, Omsk, 644050, Russian Federation
|
| 3 |
Boreskov Institute of Catalysis, Acad. Lavrentieva Ave., 5, Novosibirsk, 630090, Russian Federation
|
|
Funding (2)
|
1
|
Russian Foundation for Basic Research
|
18-03-00476 (АААА-А18-118121190005-7)
|
|
2
|
Russian Foundation for Basic Research
|
18-33-00131 (АААА-А18-118121190006-4)
|
Mechanochemical activation was used to prepare Mg(Li)Al-layered double hydroxides (LDH) with molar ratios of cations Mg/Al = 2 and 4 and Li/Al = 0.5. The influence of cationic composition and nature of interlayer anions (CO 3 2− , OH − ) on the structural properties of LDH and the properties of oxide phases formed by LDH calcination was investigated by XRD and SEM. Textural properties (nitrogen adsorption–desorption isotherms at 77.4 K) and acid-base properties (CO 2 double isotherm method, TPD-CO 2 , aldol condensation of furfural with acetone reaction) were studied in detail for mixed oxides. It was shown that mixed oxides based on the LDH that were prepared by mechanochemical route have high specific surface area and porosity. An increase in the Mg/Al ratio, the introduction of Li, and the use of LDH with OH- counterions made it possible not only to increase the total basicity of mixed oxides but also to vary the fraction of basic sites with a different strength. © 2019