A5070609919- Clay minerals and soil interactions
- Catalytic Processes in Materials Science
- Polymer Nanocomposites and Properties
- Advanced Photocatalysis Techniques
- Pigment Synthesis and Properties
- Adsorption and biosorption for pollutant removal
- Concrete and Cement Materials Research
- Bone Tissue Engineering Materials
- Polymer Nanocomposite Synthesis and Irradiation
- Recycling and utilization of industrial and municipal waste in materials production
- Iron oxide chemistry and applications
- biodegradable polymer synthesis and properties
- TiO2 Photocatalysis and Solar Cells
- Radioactive element chemistry and processing
- Advanced Nanomaterials in Catalysis
- Diamond and Carbon-based Materials Research
- Dental Implant Techniques and Outcomes
- X-ray Diffraction in Crystallography
- Extraction and Separation Processes
- Inorganic and Organometallic Chemistry
- Coal and Coke Industries Research
- Geological and Geochemical Analysis
- Dental materials and restorations
- Phosphorus and nutrient management
- Crystal Structures and Properties
VSB - Technical University of Ostrava
2015-2025
Technology Centre Prague
2017
Clays and clay minerals are common natural materials, the unique properties of which have attracted interest industry, especially because these materials easily available, cheap, non-toxic. widely used in many applications, such as ceramic production, clarification liquids, pollutant adsorbers, filler composites nanocomposites, soil amendments, pharmacy, etc. This review assesses development area application nanocomposites ceramics. The first part this study covers polymer/clay...
Abstract Apatites, particularly calcium phosphate variants, play crucial roles in medicine and energy storage applications due to their unique crystallographic structures. The synthesis of these materials can be achieved through either wet or thermal methods, each which significantly impacts properties. Key factors such as crystallite size, morphology, chemical bonding a role determining potential applications. For instance, powders, type apatite, have been synthesized using both techniques....
The alumina and zirconia surfaces were pretreated with chemical etching using alkaline mixtures of ammonia, hydrogen peroxide sodium hydroxide, followed application the powder layer Ca-deficient hydroxyapatite (CDH). influence bath conditions time concentration on surface development, composition morphology medicinal ceramic powders studied. following analyses performed: (scanning electron microscopy), phase (X-ray diffraction analysis), changes in binding interactions (FT-Infrared Energy...
The hybrid nanocomposite materials based on the vermiculite/zinc oxide-chlorhexidine were prepared in two steps. In first step oxide was by mechanochemical method followed a heat treatment at 650 °C for 90 min. second chlorhexidine dihydrochloride intercalated to weight ratio 1:1, 1:2, 1:4, 2:1 and 4:1 (wt%) thereby nanocomposites prepared. Phase analysis, crystal structure, phase transformation, chemical composition particle size of using X-ray diffraction methods, energy dispersive...
The zinc acetate dihydrate and anhydrous chloride were used as precursors for the sonochemical preparation of oxide/vermiculite organically modified oxide/vermiculite_chlorhexidine nanocomposite materials. nanocomposites mechanically processed via a high-energy ball milling 30 min at 300 rpm using two types atmospheres an air or nitrogen. Changes in temperature pressure inside grinding vessels measured during mechanical processing atmosphere. ZnO(Cl)/V_30/300 sample reached highest (1161...
Abstract The work aimed with the effect of preceramic mixtures containing natural talc (Tc) or acid‐treated (Tc‐ac) supplemented by montmorillonite (Mt) kaolinite (Ka), and flux Na 2 CO 3 on mineral phase composition, porosity pore size distribution in steatite ceramics prepared using solid state sintering at 1300°C. samples were analyzed X‐ray diffraction porometry techniques scanning electron microscopy. Application Mt Ka provided comparable results. acidification hydrochloric acid...
Two natural vermiculites (Ver) with very similar chemical composition but slightly different low charge on the layers were investigated to find an answer question, how change their structural and properties after exposure concentrations of HCl solutions.Vermiculite from Bulgaria (Ver-B) layer 0.47 eq/O 10 (OH) 2 Brazil (Ver-SL) 0.36 studied particle size fraction less than 40 μm treatment at (0.5 M 1 HCl).Both samples represent a mixed-layer structure incomplete transformation mica (biotite)...
The present article describes a method of the preparation erbium oxide nanocrystallites (nano Er₂O₃) via thermal decomposition transient complex formed in situ from Er(NO₃)₃·5H₂O and glycine. Decomposition occurred at about (250±10) °C. Ultra-fine light pink powder was obtained this method. resulting were characterized using X-ray diffraction analysis, which showed having crystallite size equal to 10 nm. Morphology examined by scanning transmission electron microscopy. Electron observed...
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The clay minerals are commonly used materials in pharmaceutical field both as inorganic excipients or active agents. We focused on the development of long-acting antimicrobial formula where act drug carries. Two series organoclay nanocomposites with increasing amount antifungal ciclopiroxolamine were successfully synthesized through intercalation reaction. In first case mineral vermiculite was supporting matrix and secondly bentonite used. structural characteristics all prepared samples...
Organically modified vermiculites can be used as nanostructured adsorbents of organic compounds from waters or gaseous phases similarly organically smectites bentonites. There is a large amount research data focused on adsorption properties organoclays, however only little information about their post-sorption treatment. This work study two possible ways subsequent processing organovermiculite after its use sorbent for heavily polluted waste water. At first, the vermiculite with...