|
|
Lanthanidocenes and their Precursors Synthesis
Kašpárek, Vít ; Hermanová, Soňa (referee) ; Richtera, Lukáš (advisor)
The first section of this bachelor’s thesis aims on a theoretical basis used to characterize new preparation substances, especially x-ray diffraction, infrared spectroscopy, Raman spectroscopy and nuclear magnetic resonance spectroscopy. The next section deals with the basic structural types of lanthanidocenes according to the substituted ligands. The last theoretical section deals with work in the gloves box and the preparation of the laboratory glasses for the work in the inert atmosphere. The aim of the experimental section was the synthesis of methoxyethane, characterization of its purity using FT-IR and its next usage in the change of organic ligands in structure of (C5Me5)SmCl2Li(OEt2)2.
|
|
|
Synthesis and properties of ceramic nanoparticles based on anionic doped composite oxides of titanium
Kašpárek, Vít ; Veselý, Michal (referee) ; Cihlář, Jaroslav (advisor)
Master’s thesis deals with synthesis of anatase and its anion doping by carbo-nitridation. Prepared samples were used for testing of the photocatalytic activity. Low-temperature anatase was synthesized at 80 °C for 6 hours and carbo-nitridatation was carried out in ammonia/tetrachloromethane atmosphere at 500 °C for 3 hours. The influence of silver content on low-temperature crystallization of anatase was studied by reaction of titanium tetraisopropoxide with water. Silver nanoparticles were prepared by reduction of silver nitrate by D-glukose and sodium citrate. One of the results is the draft for one-pot synthesis of anatase by titanium tetraisopropoxide with complexing agent (sodium citrate, ammonium citrate, citric acid). The study of photocatalysis water splitting was carried out in the presence of 20 % vol. of methanol. Anatase prepared with citric acid has the highest photocatalytic activity (Pt 0,5 %) in UV/VIS spectral region. The activity achieved 38,6 % effectiveness of TiO2 standard (Degussa P25). Doping by nitrogen didn’t lead to increase of photocatalytic activity.
|
|
|
Synthesis and properties of ceramic nanoparticles based on anionic doped composite oxides of titanium
Kašpárek, Vít ; Veselý, Michal (referee) ; Cihlář, Jaroslav (advisor)
Master’s thesis deals with synthesis of anatase and its anion doping by carbo-nitridation. Prepared samples were used for testing of the photocatalytic activity. Low-temperature anatase was synthesized at 80 °C for 6 hours and carbo-nitridatation was carried out in ammonia/tetrachloromethane atmosphere at 500 °C for 3 hours. The influence of silver content on low-temperature crystallization of anatase was studied by reaction of titanium tetraisopropoxide with water. Silver nanoparticles were prepared by reduction of silver nitrate by D-glukose and sodium citrate. One of the results is the draft for one-pot synthesis of anatase by titanium tetraisopropoxide with complexing agent (sodium citrate, ammonium citrate, citric acid). The study of photocatalysis water splitting was carried out in the presence of 20 % vol. of methanol. Anatase prepared with citric acid has the highest photocatalytic activity (Pt 0,5 %) in UV/VIS spectral region. The activity achieved 38,6 % effectiveness of TiO2 standard (Degussa P25). Doping by nitrogen didn’t lead to increase of photocatalytic activity.
|
|
|
Lanthanidocenes and their Precursors Synthesis
Kašpárek, Vít ; Hermanová, Soňa (referee) ; Richtera, Lukáš (advisor)
The first section of this bachelor’s thesis aims on a theoretical basis used to characterize new preparation substances, especially x-ray diffraction, infrared spectroscopy, Raman spectroscopy and nuclear magnetic resonance spectroscopy. The next section deals with the basic structural types of lanthanidocenes according to the substituted ligands. The last theoretical section deals with work in the gloves box and the preparation of the laboratory glasses for the work in the inert atmosphere. The aim of the experimental section was the synthesis of methoxyethane, characterization of its purity using FT-IR and its next usage in the change of organic ligands in structure of (C5Me5)SmCl2Li(OEt2)2.
|
guest ::
RSS feed.