Sciact
  • EN
  • RU

Aerogel Synthesis of Calcium Aluminates with Varied Stoichiometry ArticleGenre_short.SHORT_COMMUNICATION

Journal Journal of Sol-Gel Science and Technology
ISSN: 0928-0707 , E-ISSN: 1573-4846
Output data Year: 2022, Volume: 104, Number: 2, Pages: 259–266 Pages count : 8 DOI: 10.1007/s10971-022-05933-7
Tags Aerogel synthesis; Calcium aluminate; Differential thermal analysis; Porous structure; X-ray diffraction analysis; Spin probe EPR study
Authors Ilyina Ekaterina V. 1 , Bedilo Alexander F. 1 , Cherepanova Svetlana V. 1 , Gerus Yuri Y. 1,2 , Shuvarakova Ekaterina I. 1 , Vedyagin Aleksey A. 1
Affiliations
1 Boreskov Institute of Catalysis SB RAS, 5, Ac. Lavrentieva Ave., Novosibirsk, 630090, Russia
2 Novosibirsk State University, 1, Pirogova Str., Novosibirsk, 630090, Russia

Funding (1)

1 Ministry of Science and Higher Education of the Russian Federation 0239-2021-0010

Abstract: Calcium aluminates are attractive materials possessing unique physicochemical properties. In the present work, three aluminate systems of varied Ca/Al ratio (1/2, 6/7, and 3/2) were prepared via aerogel technique and characterized. The decomposition behavior of hydroxide aerogels was studied by differential thermal analysis. As found, the specific surface area (SSA) of the samples dried in an autoclave at 265 °C is increased from 265±10 to 515±30 m2/g when the Ca/Al ratio changes from 3/2 to 1/2. The calcination of these samples at 500 °C decreases the SSA values ~1.6-1.8 times whereas the tendency regarding the Ca/Al ratio remains the same. Reflections assigned to a mixture of various calcium aluminate phases appeared in the diffraction patterns of the samples only after the calcination at 900 °C. The application of the spin probe electron paramagnetic resonance technique allowed registering electron-donor, weak electron-acceptor, and radical sites on the surface of all the aerogel samples of calcium aluminates calcined at 500 °C and their concentrations depended on the Ca/Al ratio.
Cite: Ilyina E.V. , Bedilo A.F. , Cherepanova S.V. , Gerus Y.Y. , Shuvarakova E.I. , Vedyagin A.A.
Aerogel Synthesis of Calcium Aluminates with Varied Stoichiometry
Journal of Sol-Gel Science and Technology. 2022. V.104. N2. P.259–266. DOI: 10.1007/s10971-022-05933-7 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
Submitted: Jun 1, 2022
Accepted: Sep 2, 2022
Published online: Sep 27, 2022
Published print: Nov 1, 2022
Identifiers:
Web of science: WOS:000862910100001
Scopus: 2-s2.0-85138761996
Elibrary: 50500576
Chemical Abstracts: 2022:2529569
Chemical Abstracts (print): 180:292304
OpenAlex: W4297338105
Citing:
DB Citing
Scopus 6
Web of science 5
Elibrary 10
OpenAlex 6
Altmetrics: