Microwave-assisted condensation approach for vanadium silicate microspheres and their catalytic activity in cyclohexene epoxidation and ethyl lactate oxidation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F25%3A63593098" target="_blank" >RIV/70883521:28610/25:63593098 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/25:00141476
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1226086X25000024?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1226086X25000024?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jiec.2025.01.003" target="_blank" >10.1016/j.jiec.2025.01.003</a>

Result language
angličtina
Original language name
Microwave-assisted condensation approach for vanadium silicate microspheres and their catalytic activity in cyclohexene epoxidation and ethyl lactate oxidation
Original language description
A novel, highly efficient condensation approach for the preparation of heterogeneous vanadium silicate microspherical catalyst is introduced. This synthetic method is based on a microwave-assisted preparation of hybrid vanadium biphenyl dicarboxylate-based precursor solution and subsequent condensation with (3-aminopropyl)triethoxysilane. The as-prepared hybrid metallosilicate is then calcined at 500 °C to obtain amorphous and porous vanadium silicate microspheres with highly dispersed vanadium species inserted into the silicate matrix. This catalyst with 2.85 wt% of vanadium contains evenly distributed VOx species, which possesses high catalytic activity in a cyclohexene epoxidation reaction, reaching a conversion of 54 % after 4 h with 92 % selectivity to cyclohexene oxide. The catalyst's TOF value achieved 220 h−1, indicating its high performance compared to vanadium-containing catalyst analogs. Furthermore, a significant catalytic activity of prepared vanadium silicate microspheres in ethyl lactate oxidation to ethyl pyruvate with the conversion of 21 % at mild conditions shows a high potential of the catalyst for industrial application compared to the contemporary V2O5 heterogeneous catalyst.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20401 - Chemical engineering (plants, products)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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