Sol-gel synthesized plasmonic nanoparticles and their integration into dye sensitized solar cells

In the present study, we synthesized silver nanoparticles in titanosilicate matrix through low cost non-hydrolytic sol-gel method using titanium isopropoxide (TIP), tetraethylorthosilicate (TEOS, (Si(OC2H5)4) and ethanol (C2H5OH) as solvents. These were investigated for the plasmonic effect of nanoparticles in dye sensitized solar cells (DSSC). The fabricated dye-sensitized solar cells with Ag: SiO2-TiO2 films coated in fluorine doped tin oxide (FTO) glass plate with dye of amaranthus red shows an improved output voltage. The samples were optically and structurally well studied by absorption spectroscopy, Fourier transform infrared spectroscopy(FTIR), X-Ray diffraction (XRD) and transmission electron microscopy(TEM). The XRD studies confirmed the crystalline nature of TiO2 and Ag.publishe

Thermal analysis and neutron imaging studies of the metal hydride storage tank doctoral thesis /

Tyt. z ekranu tytułowego.Praca doktorska, Akademia Górniczo-Hutnicza im. Stanisława Staszica (Kraków), 2011.Zawiera bibliogr.Dostępna także w wersji drukowanej.Tryb dostępu: Internet.Need for hydrogen driven applications, challenges of hydrogen-based energy systems, hydrogen basics, topic of the thesis, Hydrogen Storage Methods, hydrogen in compressed gaseous form, recent developments, Liquid Hydrogen Storage, challenges in liquid hydrogen storage, recent developments, solid state hydrogen storage, metal hydrides, Lennard-Jones picture, reaction mechanism, thermodynamics, Pressure-Composition-Temperature, PCT relationship, mechanism of activation, kinetics, Thermal Analysis, experimental input, sample preparation, hydrogen absorption desorption experiment, results, Neutron Imaging, source, neutron interaction with matter, reconstruction of images for neutron radiography, tomography, image processing, CONRAD configuration, hydrogen storage tank, supplying set up, neutron radiography experiments, experiments at 5 bar, 10 bar, kinetic studies of tubular-shaped container, experimental setup, kinetics at 4 bar, hydrogen pressure influence on kinetics, neutron tomography experiment

Modelling the evolution of temperature inside LaNi4.78Sn0.22 storage tank during refueling

International audienc

2D-modeling of temperature evolution inside a LaNi4.78Sn0.22 storage tank during refuelling

International audienc

Physical Properties of Ti₄₅Zr₃₈Fe₁₇ Alloy and Its Amorphous Hydride

The alloys based on Ti-Zr are considered an excellent candidate for hydrogen storage applications. In this communication, we report the results of Fe substitution for Ni in the well-known Ti45Zr38Ni17 compound. The parent and related compounds can be obtained as amorphous powders, transforming into the quasicrystalline phase (i-phase) after annealing. The amorphous Ti45Zr38Fe17 phase is transformed into the icosahedral quasicrystalline state, and it is a quasi-continuous process. The i-phase is well-developed close to 500 °C. At higher temperatures, the quasicrystal structure transforms into the other phase: the w-phase (an approximant to the crystalline phase) and another crystal phase with a small addition of the FeZr3 and the Fe2(ZrTi)3. The amorphous Ti45Zr38Fe17 phases can be hydrogenated while maintaining the amorphous nature, which constitutes another very fascinating research field for our group. The investigated alloy shows a good capacity for gaseous H2 at level 2.54 wt.% at elevated temperatures. The ferromagnetic signal of the amorphous TiZrFe comes from magnetic nanocrystallites in the amorphous matrix. After heating, the magnetic signal significantly decreases due to the lack of long-range magnetic ordering in the i-phase of the Ti45Zr38Fe17 alloy

Physical Properties of Ti45Zr38Fe17 Alloy and Its Amorphous Hydride

The alloys based on Ti-Zr are considered an excellent candidate for hydrogen storage applications. In this communication, we report the results of Fe substitution for Ni in the well-known Ti45Zr38Ni17 compound. The parent and related compounds can be obtained as amorphous powders, transforming into the quasicrystalline phase (i-phase) after annealing. The amorphous Ti45Zr38Fe17 phase is transformed into the icosahedral quasicrystalline state, and it is a quasi-continuous process. The i-phase is well-developed close to 500 °C. At higher temperatures, the quasicrystal structure transforms into the other phase: the w-phase (an approximant to the crystalline phase) and another crystal phase with a small addition of the FeZr3 and the Fe2(ZrTi)3. The amorphous Ti45Zr38Fe17 phases can be hydrogenated while maintaining the amorphous nature, which constitutes another very fascinating research field for our group. The investigated alloy shows a good capacity for gaseous H2 at level 2.54 wt.% at elevated temperatures. The ferromagnetic signal of the amorphous TiZrFe comes from magnetic nanocrystallites in the amorphous matrix. After heating, the magnetic signal significantly decreases due to the lack of long-range magnetic ordering in the i-phase of the Ti45Zr38Fe17 alloy

Imaging of an operating LaNi4.8A10.2-based hydrogen storage container

International audiencen this paper the phenomena occurring inside of a hydrogen storage container (filled with LaNi4.8Al0.2 active material), in operation, are unveiled by means of high-resolution neutron radiography and tomography. Although the metallic hydride-based storage systems are commonly used and commercially available, the processes occurring inside of such devices have been derived rather on the knowledge of several external parameters (changes of H2 pressure or the container's temperature) characterising the whole container than on a direct experimental evidence of the container's interior. The results of neutron imaging experiments reported here show the possibility of qualitative as well as quantitative analysis of hydrogen absorption/desorption kinetics with spatial resolution of 70 μm