Development of Carbon–Silica Composite Materials and Their Studying and Testing for Preparing Heterogeneous Biocatalysts for the Low-Temperature Synthesis of Esters Full article
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Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2023, Volume: 64, Number: 2, Pages: 201–214 Pages count : 14 DOI: 10.1134/S0023158423020039 | ||
| Tags | carbon–silica composit, multiwalled carbon nanotubes, lipase adsorption, biocatalysts, esterification | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0005 |
Abstract:
Carbon–silica composite materials (CSCMs) containing different amounts of silica and carbon components are obtained using two silica precursors (silica sol and silane) and multiwalled carbon nanotubes (MWNTs). At the initial stage of obtaining CSCMs by method 1, a fine MWNT powder is subjected to impregnation by moisture capacity with silica sol; in accordance with method 2, MWNTs are treated with tetraethoxysilane and then subjected to hydrolysis and polycondensation. The silica (SiO2) content in the composites is varied in a range of 3–60 wt %. After drying and an appropriate heat treatment at 250–350°C, the composite materials are studied by various physicochemical methods, namely, nitrogen porosimetry, electron microscopy, X-ray fluorescence analysis, and thermogravimetric analysis. It is found that the parameters, including texrural characteristics, significantly differ depending on the chemical composition of the CSCMs. Thus, with an increase in the SiO2 content, the specific surface area of the composite materials increases (by a factor of 2) and the pore diameter distribution curves exhibit maxima (at 20–40 nm). The composite materials are studied as adsorbing supports for preparing heterogeneous biocatalysts (BCs) for the low-temperature synthesis of esters, in which the active component is lipase immobilized exclusively on the carbon surface of the nanotubes. With a decrease in the MWNT content in the composite materials, the enzyme activity and operational stability of the BCs, which are measured in the esterification of heptanoic acid (С7) with butanol (С4), monotonically decrease; at the maximum SiO2 content (58 wt %), the activity decreases by a factor of 2–8.
Cite:
Kovalenko G.A.
, Perminova L.V.
, Goidin V.V.
, Zavorin A.V.
, Moseenkov S.I.
, Kuznetsov V.L.
Development of Carbon–Silica Composite Materials and Their Studying and Testing for Preparing Heterogeneous Biocatalysts for the Low-Temperature Synthesis of Esters
Kinetics and Catalysis. 2023. V.64. N2. P.201–214. DOI: 10.1134/S0023158423020039 WOS Scopus РИНЦ ANCAN OpenAlex
Development of Carbon–Silica Composite Materials and Their Studying and Testing for Preparing Heterogeneous Biocatalysts for the Low-Temperature Synthesis of Esters
Kinetics and Catalysis. 2023. V.64. N2. P.201–214. DOI: 10.1134/S0023158423020039 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Коваленко Г.А.
, Перминова Л.В.
, Гойдин В.В.
, Заворин А.В.
, Мосеенков С.И.
, Кузнецов В.Л.
Получение композитных углерод-силикатных материалов, их исследования и испытания для приготовления гетерогенных биокатализаторов низкотемпературного синтеза сложных эфиров
Кинетика и катализ. 2023. Т.64. №2. С.227-242. DOI: 10.31857/S045388112302003X РИНЦ OpenAlex
Получение композитных углерод-силикатных материалов, их исследования и испытания для приготовления гетерогенных биокатализаторов низкотемпературного синтеза сложных эфиров
Кинетика и катализ. 2023. Т.64. №2. С.227-242. DOI: 10.31857/S045388112302003X РИНЦ OpenAlex
Dates:
| Submitted: | Sep 21, 2022 |
| Accepted: | Nov 3, 2022 |
| Published print: | Apr 1, 2023 |
| Published online: | Jun 16, 2023 |
Identifiers:
| Web of science: | WOS:001011416800009 |
| Scopus: | 2-s2.0-85161969423 |
| Elibrary: | 54050178 |
| Chemical Abstracts: | 2023:1256898 |
| Chemical Abstracts (print): | 183:215787 |
| OpenAlex: | W4380760385 |