Synthesis of benzaldehyde with high selectivity using immobilized AuNPs and AuNPs@zeolite in a catalytic microfluidic system
| Autor: | Xi Rao, Erick Osvaldo Martinez Ruiz, Michael Tatoulian, Stéphanie Ognier, Cédric Guyon, Ali Abou Hassan |
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| Rok vydání: | 2019 |
| Předmět: |
010401 analytical chemistry
Biomedical Engineering Bioengineering 02 engineering and technology General Chemistry Cyclic olefin copolymer 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry 0104 chemical sciences Catalysis Benzaldehyde chemistry.chemical_compound Adsorption chemistry Benzyl alcohol Microreactor 0210 nano-technology Selectivity Zeolite Nuclear chemistry |
| Zdroj: | Lab on a Chip. 19:2866-2873 |
| ISSN: | 1473-0189 1473-0197 |
| DOI: | 10.1039/c9lc00386j |
| Popis: | In the present work, gold based catalysts were synthesized and immobilized on the surface of cyclic olefin copolymer (COC) microreactors. The microreactors were subsequently applied in a homemade microfluidic system for synthesizing benzaldehyde by oxidation of benzyl alcohol in water medium. The Au nanoparticles (NPs) immobilized on the inner surface of the microchannel showed a very high selectivity (94%) for benzaldehyde, while zeolite NPs exhibited only an adsorption feature to this reaction. Moreover, the results showed that the AuNP catalytic activity was maintained for at least 9 hours. However, the obtained conversion with AuNPs was only 20%, indicating a relatively low productivity. In comparison, AuNPs assembled on the surface of zeolite NPs (AuNPs@zeolite) and immobilized in the microchannel showed the best catalytic performance, as the highest benzaldehyde selectivity (>99%) with a relatively high benzyl alcohol conversion of 42.4% was achieved under the same conditions. To the best of our knowledge, this is the first example demonstrating the use of AuNP or AuNP@zeolite catalysts in a microsystem performing such high selectivity for benzaldehyde in water medium. |
| Databáze: | OpenAIRE |
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