Archiv článků :: Co mě baví

27.04.2017 03:25

Tsoncheva, T., A. Mileva, G. Issa, M. Dimitrov, D. Kovacheva, J. Henych, N. Scotti, M. Kormunda, G. Atanasova and V. Stengl (2017). "Template-assisted hydrothermally obtained titania-ceria composites and their application as catalysts in ethyl acetate oxi

High surface area mesoporous ceria-titania binary materials with high Lewis acidity and improved reduction properties were synthesized using template assisted hydrothermal technique. The obtained materials were characterized by low temperature nitrogen physisorption, XRD, SEM, TEM, Raman, UV vis,...

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27.04.2017 03:23

Mileva, A., G. Issa, J. Henych, V. Stengl, D. Kovacheva and T. Tsoncheva (2017). "CeO2 and TiO2 obtained by urea assisted homogeneous hydrolyses method as catalysts for environmental protection: Effect of Ti/Ce ratio." Bulgarian Chemical Communications 49

In present study mesoporous titanium-cerium oxide materials with different composition were prepared by homogeneous precipitation with urea. The samples were characterized by nitrogen physisorption, XRD, UV-Vis, Raman, temperature programmed reduction and their catalytic properties were studied in...

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27.04.2017 03:19

Ederer, J., P. Janos, P. Ecorchard, J. Tolasz, V. Stengl, H. Benes, M. Perchacz and O. Pop-Georgievski (2017). "Determination of amino groups on functionalized graphene oxide for polyurethane nanomaterials: XPS quantitation vs. functional speciation." Rsc

Amino-functionalized graphene oxide was reacted with isocyanate monomer to evaluate the potential application of GO-NH2 as a functional filler for the preparation of polyurethane nanocomposites. A set of advanced techniques (XRD, FTIR spectroscopy, Raman spectroscopy, and TEM) was used to...

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27.04.2017 02:52

Stengl, V., J. Henych, P. Janos and M. Skoumal (2016). Nanostructured Metal Oxides for Stoichiometric Degradation of Chemical Warfare Agents. Reviews of Environmental Contamination and Toxicology, Vol 236. P. DeVoogt. 236: 239-258.

DOI: 10.1007/978-3-319-20013-2_4

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27.04.2017 02:39

Reactive adsorption of toxic organophosphates parathion methyl and DMMP on nanostructured Ti/Ce oxides and their composites, Henych, J., Janoš, P., Kormunda, M., Tolasz, J., Štengl, V., Arabian Journal of Chemistry, 2016,

Pure titanium and cerium oxides and their composites were prepared by the modified method of homogeneous hydrolysis with urea as the precipitating agent. The as-synthesized nanostructured oxides were examined by XRD, XPS, microscopic techniques (SEM, HRTEM), nitrogen...

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27.04.2017 02:33

Polakova, L., H. Benes, P. Ecorchard, E. Pavlova, Z. Sedlakova, J. Kredatusova and V. Stengl (2016). "Nanocomposite preparation via in situ polymerization of quaternary ammonium salt ion-bonded to graphite platelets." Rsc Advances 6(1): 353-357.

Here we report a novel method of intercalation of a quaternary ammonium salt bearing a polymerizable group in between graphite galleries. By the exfoliation of the intercalate during its subsequent polymerization with n-butyl methacrylate, a polymer membrane with homogenously dispersed graphene...

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27.04.2017 02:24

Mileva, A., G. Issa, J. Henych, V. Stengl, D. Kovacheva and T. Tsoncheva (2016). "Effect of preparation procedure on the formation of nanosized mesoporous TiO2-CeO2 catalysts for ethyl acetate total oxidation and methanol decomposition." Bulgarian Chemica

Two series TiO2-CeO2 samples were synthesized using homogeneous precipitation with urea and template-assisted hydrothermal procedures. The samples were characterized by nitrogen physisorption, XRD, UV-Vis, Raman and TPR techniques. The catalytic properties of the obtained materials were studied in...

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27.04.2017 02:17

Janos, P., J. Henych, O. Pelant, V. Pilarova, L. Vrtoch, M. Kormunda, K. Mazanec and V. Stengl (2016). "Cerium oxide for the destruction of chemical warfare agents: A comparison of synthetic routes." Journal of Hazardous Materials 304: 259-268.

Four different synthetic routes were used to prepare active forms of cerium oxide that are capable of destroying toxic organophosphates: a sol-gel process (via a citrate precursor), homogeneous hydrolysis and a precipitation/calcination procedure (via carbonate and oxalate precursors). The samples...

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27.04.2017 02:09

Tsoncheva, T., R. Ivanova, J. Henych, N. Velinov, M. Kormunda, M. Dimitrov, D. Paneva, M. Slusna, I. Mitov and V. Stengl (2016). "Iron modified titanium-hafnium binary oxides as catalysts in total oxidation of ethyl acetate." Catalysis Communications 81:

Multicomponent iron-titanium-hafnium oxide materials with different compositions were prepared by combination of homogeneous precipitation with urea and incipient wetness impregnation techniques and tested as catalysts for ethyl acetate oxidation as representative VOCs. Nitrogen physisorption, XRD,...

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27.04.2017 02:02

Tsoncheva, T., R. Ivanova, M. Dimitrov, D. Paneva, D. Kovacheva, J. Henych, P. Vomacka, M. Kormunda, N. Velinov, I. Mitov and V. Stengl (2016). "Template-assisted hydrothermally synthesized iron-titanium binary oxides and their application as catalysts fo

Iron-titanium binary oxides were synthesized by template-assisted hydrothermal method. The effect of the variation in the Fe/Ti ratio and the temperature of hydrothermal treatment on the phase composition, structural, textural and redox characteristics of thus obtained materials was studied by...

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