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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...
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Venezuela and Cuba: The Comparison of the Regimes and the Mutual Relations
Kovanda, Filip ; Soukup, Jaromír (advisor) ; Kučerová, Irah (referee)
This Bachelor thesis is focused on the comparation of current political regimes in Venezuela and Cuba and on their mutual relations. In the comparation there is a specific attention paid to several chosen aspects that are key for the character of the regimes. These aspects are the causes and circumstances of the regimes' establishments, the personalities of their main leaders, the formation of the regimes during the first years in office, main political events and the official ideologies, foreign policies and their international positions and last but not least the economic situation of both countries. The contents of the thesis is divided into four main sections. The first section contains a thorough analysis of the regime in Venezuela that has existed from the year 1999 and also includes a short analysis of the events that lead to its establishment. The second section analyses the situation in Cuba since Fidel Castro came to power and it also pays a short attention to the circumstances that preceded that. The third extensive part analyses relations between Venezuela and Cuba since the year 1999 and it also summarizes the relations between these states from the beginning of Fidel Castro's government in 1958 to the year 1999. The fourth section compares both regimes with specific attention to the spheres...
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Venezuela and Cuba: The Comparison of the Regimes and the Mutual Relations
Kovanda, Filip ; Soukup, Jaromír (advisor) ; Kučerová, Irah (referee)
This Bachelor thesis is focused on the comparation of current political regimes in Venezuela and Cuba and on their mutual relations. In the comparation there is a specific attention paid to several chosen aspects that are key for the character of the regimes. These aspects are the causes and circumstances of the regimes' establishments, the personalities of their main leaders, the formation of the regimes during the first years in office, main political events and the official ideologies, foreign policies and their international positions and last but not least the economic situation of both countries. The contents of the thesis is divided into four main sections. The first section contains a thorough analysis of the regime in Venezuela that has existed from the year 1999 and also includes a short analysis of the events that lead to its establishment. The second section analyses the situation in Cuba since Fidel Castro came to power and it also pays a short attention to the circumstances that preceded that. The third extensive part analyses relations between Venezuela and Cuba since the year 1999 and it also summarizes the relations between these states from the beginning of Fidel Castro's government in 1958 to the year 1999. The fourth section compares both regimes with specific attention to the spheres...
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Co-Mn Mixed Oxides Preared by Magnetron Sputtering on Meshes as Catalysts for Oxidation of Organic Compounds.
Jirátová, Květa ; Perekrestov, Roman ; Dvořáková, M. ; Balabánová, Jana ; Koštejn, Martin ; Topka, Pavel ; Kšírová, Petra ; Čada, Martin ; Hubička, Zdeněk ; Kovanda, F.
The catalysts with various Mn content were examined by XRD, SEM, FUR. XPS, and Ih-TPR. tested in the gas-phase oxidation of model organic compound (ethanol) and compared with pelletized commercial Co-Mn- Al mixed oxide catalyst (Astin 2-100, Czech Republic, Co:Mn:Al molar ratio of 4:1:1 ).
Fulltext: content.csg -  DOC
Plný tet: 00206B6C274C191104151706 - DOC
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