čas: 23.4.2021 00:09:54
Obnovit | RAW
Institute of Inorganic Chemistry of the CAS, v. v. i.
List of available PhD theses
Inorganic fillers and sorbents
Within the projects we studied various types of fillers for polymer matrix, based on graphene and its derivatives and on double layered hydroxides in combination with ionic liquids. During the dissertation, the focus would be given on the development of individual types of 2D materials with specific properties, e.g., conductivity, mechanical, catalytic, photocatalytic. Inorganic fillers will be modified with suitable ionic liquids, which may have multiple functions and will be chosen accordingly to the subsequent use. Modification will be possible with commercially available ionic liquids or newly prepared ionic liquids. These materials are often good sorbents, for this reason these properties will be also studied for sorption of heavy metals or organic contaminants.
Novel types of substitutions at boron and carbon atoms in carboranes and metallacarboranes directed to non-taditional drugs
Aim of this topic is design of novel structural blocks that can be incorporated to design of non-traditional drugs
Synthesis and Applications of Novel Phosphinate Metal-Organic Frameworks
Metal-organic frameworks (MOF) are fast growing area of research that combine metal centres and organic linkers to form a crystalline material that contains pores. Due to the control on the molecular level and tunability of the structures, the specific surface area of MOFs is greater than 1000 m2/g. The chemical and topological diversity also allows tailoring the structure for given application. The aim of the dissertation thesis will be the synthesis and application of novel MOFs based on phosphinate (POOH) containing linkers. Within the frame of the thesis the student will learn synthethic procedures for the synthesis of novel phosphinate linkers, MOFs, their characterization (NMR, powder XRD, adsorption of N2, thermal analysis, etc.), and their applications. The work will be done at the Institute of Inorganic Chemistry of the Czech Academy of Sciences in Řež.
Synthesis of chiral carboranes and metallacarboranes, their separation and interactions with organic systms
This topics deals with synthesis of asymmetric boron clusters and their interactions with organic platforms.
Thin films of multiferoic hexagonal ferrites with magnetoelectric properties
The scope of proposed PhD work involves in the experimental part the technology of preparation of ceramic samples and thin films of multiferoic hexagonal ferrites with magnetoelectric properties by soft chemistry routes, and their complex chemical, microstructural, structural and physical characterization. The PhD study will be focused to the Y- and Z-type hexaferrites studied in the form of ceramics and thin films. In particular, thin films will be prepared by means of chemical solution deposition methods using spin- or dip-coating deposition technique. Chemical investigation includes systematic study of their real (micro) structure (x-ray and neutron diffraction, electron microscopy) in relation to their functional properties. Physical investigations include measurements of electrical conductivity, dielectric properties complemented with the magnetic and magnetoelectric measurements (in cooperation with both domestic, and foreign physical laboratories).
Titanium oxides and titanates for advanced applications
Li-ion batteries are one of the most promising electrochemical power sources. Ti-based materials such as Li4Ti5O12, Li2Ti3O7, TiO2-B and H2Ti3O7, are considered as important anodes for Li-ion batteries due to their high safety and excellent cycling stability. Li-ion battery (LIB) technology (typically using carbon materials as the anode) faces serious challenges if it is to take over the hybrid electric vehicles and stationary power sources. Ti-based compounds, especially Li4Ti5O12 have been demonstrated as the most promising anode materials for large-sized LIBs since they exhibit excellent cycling reversibility and a high operating voltage to ensure improved safety. However, the rate capability of these Ti-based materials are relatively low because of a large polarization at high charge–discharge rates. To enhance its electrical conductivity, ion doping and surface modification, and ionic diffusivity by designing various nanosized materials were used. A new preparation method will be used based on the extraction of sulphate ions from the crystals of titanium sulphate hydrates and their replacement with hydroxyl groups in aqueous alkali solution. The method leads to nanostructured metatitanic acid or alkali titanates and is suitable also for metal doping the material.