Au Supported TiO2-Nanofibers as Novel Catalysts for Glycerol Oxidation
Key Engineering Materials 2018
Svetlana Čornaja, Reinis Drunka, Konstantīns Dubencovs, Svetlana Žižkuna, Dzidra Jankoviča, Janis Kunakovs, Aija Krūmiņa, Elīna Sīle

Composites of Au supported on the TiO2-nanofibers (Au/NF-TiO2) were synthesized and tested in glycerol oxidation processes. TiO2-nanofibers were prepared by a microwave-assisted hydrothermal synthesis method. Chemical deposition method was used for nanofibers modification with Au nanoparticles. Oxidation of aqueous glycerol solutions by molecular oxygen in the presence of Au/NF-TiO2 nanocomposites was performed. It was found that Au/NF-TiO2 composites are catalytically active in alkaline glycerol water solutions. The main product of glycerol catalytic oxidation was glyceric acid, by-products were – tartronic, lactic, glycolic, oxalic, acetic and formic acid. It was shown that Au/NF-TiO2 catalysts’ activity and selectivity depend on Au weight loading, glycerol/Au molar ratio, oxygen pressure and NaOH initial concentration. The best result was achieved using the 0.5 wt%Au/NF-TiO2 catalyst: selectivity by glyceric acid was 76% with glycerol conversion 100%.

Catalysis, Glycerol, Gold, Nanofibers, Oxidation, Titanium Oxide (TiO2)

Čornaja, S., Drunka, R., Dubencovs, K., Žižkuna, S., Jankoviča, D., Kunakovs, J., Krūmiņa, A., Sīle, E. Au Supported TiO2-Nanofibers as Novel Catalysts for Glycerol Oxidation. In: Key Engineering Materials, Latvia, Rīga, 20-21 October, 2017. --, 2018, pp.294-299. ISBN 978-3-0357-1238-4. ISSN 1013-9826. e-ISSN 1662-9795. Available from: doi:10.4028/

Publication language
English (en)
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