National Repository of Grey Literature 48 records found  previous11 - 20nextend  jump to record: Search took 0.01 seconds. 
Synthesis and properties of zinc hydroxide and zinc oxide nanosheets
Hynek, Jan ; Lang, Kamil (advisor) ; Kovanda, František (referee)
1 Abstract The structure of layered zinc hydroxide intercalated with dodecyl sulfate (LZH-DS) anions was studied in detail. LZH-DS was prepared by direct precipitation in water and formed different phases. The following phases of LZH-DS were prepared - "extended" phase (ex) by direct precipitation in water, "shrunk" (s) and "super-shrunk" (ss) phases via treatment of LZH-DS(ex) phase in methanol. The studies of the thermal behavior of LZH-DS(ex) revealed interstratification of intercalated DS anions. It is the first example of interstratification in layered hydroxides that are intercalated with long aliphatic alkyl chain anions. The experimental results were used for molecular dynamic modelling of the structures. Nanometric thin films were prepared by dip-coating and inkjet printing of ZnO nanosheets on glass plates. The side-by-side alignment of the ZnO nanosheets on the substrate resulted in thin, transparent, oriented ZnO surfaces with the high-energy {001} facets exposed. The method of nanosheet deposition affected the film morphology; the dip-coated films were smooth and nonporous, while the inkjet-printed films were rough and had a surface area in the range of approximately 100-160 m2 g-1 . The first-order rate constants for the photocatalytic degradation of 4-chlorophenol on the nanosheet-based films...
Deep Oxidation of Ethanol over Co-Mn-Al Mixed Oxides Supported on Pelletized Magnesia-Alumina: Role of Acid-base Properties.
Jirátová, Květa ; Balabánová, Jana ; Kovanda, F. ; Obalová, L.
In the present study, we applied the method of impregnation using acidic solution of metal salts in combination with a support having basic properties that could limit penetration of active components into the support pellets.
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Supported Potassium-Doped Co3O4 Catalysts for N2O Decomposition
Klyushina, A. ; Kovanda, F. ; Jirátová, Květa ; Obalová, L.
Supported Co3O4 catalysts were prepared by heating the cobalt hydroxide synthesized electrochemically on tainless steel sieve and by heating the commercial TiO2 tablets impregnated with cobalt nitrate solution; the catalysts were than modified with potassium promoter.
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Effect of Precursor Synthesis on Catalytic Activity of Co3O4 in N2O Decomposition
Chromčáková, Ž. ; Obalová, L. ; Kovanda, F. ; Pacultová, K. ; Kukutschová, J. ; Michalik, S. ; Kustrowski, P. ; Jirátová, Květa
The correlation between methods of preparation, phase composition of precursors, catalytic properties of the related oxide catalysts, and the role of the cobalt ions as catalytic active sites is discussed.
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New Catalyst for Removal of N2O from Nitric Acid Plant Tail Gases
Obalová, L. ; Kovanda, F. ; Jirátová, Květa ; Šrámek, J. ; Karásková, K. ; Chromčáková, Ž. ; Borovec, K. ; Dej, M.
In the present work, the Co-Mn-Al mixed oxide modified by K was prepared in the pilot plant scale for the first time and tested in real conditions. Result of N2O catalytic decomposition in the pilot plant reactor installed at the bypassed tail gas from the nitric production plant are shown and obtained kinetic datae used for modelling of full scale reactor for N2O emissions abatement.
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National Repository of Grey Literature : 48 records found   previous11 - 20nextend  jump to record:
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2 Kovanda, Filip
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