Search Results (50)
Environmental impacts of building materials containing by-products from steel industry
Recycling and reuse of waste by-products from steel industry is a common practice worldwide, which is in the last decade becoming more and more established also in Slovenia. Wastes from steel-making industry can be reused as alternative materials to successfully replace natural raw materials in asphalt mixes and in numerous …
Iodine(I) compounds: Catalysts for iodination of organic molecules
The use of hydrogen peroxide as enviromentally benign oxidant for the oxidative iodination of organic molecules with iodine in the presence of halide ions as catalysts for the formation of iodine(I) species was investigated. The study of the reaction system iodine/ hydrogen peroxide/ acid revealed the formation of iodine(I) compound …
Heterogeneous nucleation of iron oxide (γ-Fe2O3) in colloidal systems
Presented work is a study of magnetic iron oxide (referred to as spinel) coating synthesis. The coatings were synthesized on the surfaces of selected core nanoparticles with heterogeneous nucleation during the co-precipitation of the Fe3+/Fe2+ ions. The work is divided into three parts. The first part comprise the synthesis of …
Investigation of heterogeneous reactions of trifluoromethane with some metal oxides, hydroxides and carbonates
Heterogeneous reactions of trifluoromethane CHF3 with solid xerogel oxides, alkali hydroxides and carbonates were investigated under static and dynamic conditions and at moderate temperatures. In all cases, main reaction is fluorination characterised by a complete decomposition (mineralisation) of the fluorinating agent, CHF3, and the formation of the solid metal fluorides. …
Synthesis and functionalisation of one-dimensional titanate-based nanostructures
One-dimensional hydrothermally synthesized nanostructures such as nanotubes and nanobelts composed of layered titanates from A2TinO2n+1 family have attracted great interest due to their high specific surface area, ion-exchange ability and semiconducting properties, which make them promising candidates for potential applications in the field of catalysis, gas sensors, dye-sensitized solar cells, …
Extension of the range of primary vacuum calibration methods with the use of nonevaporable getters
Measurement of ultrahigh vacuum (UHV) and extremely high vacuum (XHV) is important in many advanced research and technology fields such as: equipment for surface analysis, particle accelerators, simulation of interstellar space, processing of advanced semiconductors, electron tubes, FE displays, etc. For traceable calibrations of UHV and XHV gauges we need …
Superhydrophility of plasma treated materials
In this doctoral thesis, we present the superhydrophilic effect on surfaces of three different materials, i.e. highly oriented pyrolytic graphite, graphite foil and graphite grain in polymer composite. In order to induce this complicated effect on the surface we used reactive oxygen plasma treatment. The plasma was created in glass …
Ion beam analysis of geometrically structured samples
An experimental set-up for the detection of scattered projectile ions was constructed at the external (in air) beamline of the Microanalytical Center at the Jožef Stefan Institute. The system is composed of a detector for the analysis of back-scattered projectiles, casually called the RBS detector, a precise positioning system and …
Radon in Kosovo
Radon and its progeny play an important role contributing to the dose of radiation which a person receives from all natural sources of ionizing radiation. This is one of the reasons why this problem has been of great interest, as a result of which an increased number of scientific works …
Mercury in the Process of Cement Clinker Production and Emission Control
Mercury is a very toxic element. Due to its volubility it is present everywhere in the environment at ambient temperature. High temperature processes increased levels of mercury on the global scale. Global and European action plans were established to reduce mercury emissions and remove mercury from the environment. Cement plants …