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January 2008 - present
Education
October 1997 - December 2002
October 1993 - June 1997
Publications
Publications (52)
Efficient large-scale methods for production of photocatalytic coatings active in the visible light are still in demand. Photocatalytically active oxygen-enriched titanium dioxide was selected as the feedstock for low pressure cold spraying (LPCS). The oxygen enrichment was carried out on the sol-gel synthesis route to impair activity in the visibl...
The TiO 2 photocatalytic coatings’ most important properties are durability and photocatalytic activity. Those features form a basis to determine its degree of usefulness. In this study, the self-synthesized amorphous TiO 2 powder was used for low-pressure cold spray photocatalytic coatings. Two strategies were adopted to change the surface propert...
Visible-light active photocatalysts in the form of coatings that can be produced using large-scale methods have attracted considerable attention. Here we show a facile approach to deposit coatings using the low pressure cold spray (LPCS) from oxygen-rich amorphous titanium dioxide, which is a structurally-unconventional feedstock powder for LPCS. W...
This work shows that the titanium dioxide coatings obtained by low-pressure cold gas spraying with the use of the sol–gel amorphous TiO 2 powder are characterized by photocatalytic activity despite their partial amorphous content. Moreover, the research outcome suggests that the decomposition rate of organic pollutants is enhanced after long-term e...
The deposition mechanism of low-pressure cold spraying of ceramics on polymeric substrates is still unclear. In the presented study titanium dioxide powders were self-synthesized on the sol-gel route and deposited on ABS polymer by low pressure cold spraying. Three variants of powders that differ in the structure were prepared: amorphous powder, an...
Composite materials containing zero valent copper (ZVC) dispersed in the matrix of two commercially available strongly basic anion exchangers with a macroreticular (Amberlite IRA 900Cl) and gel-like (Amberlite IRA 402OH) structure were obtained. Cu0 particles appeared in the resin phase as the product of the reduction of the precursor, i.e., copper...
Titanium dioxide is a very popular ceramic material due to its outstanding properties, e.g. photocatalytic conversion. Titania coatings are able to activate chemical reactions on its surface. However, photocatalytic activity strongly depends on crystal structure, the size and shape of crystallites and also the surface area. This article is devoted...
Intermetallic compounds, especially aluminides, show good high-temperature strength, oxidation resistance, high melting points, and thus have received considerable attention as potential substitutes for superalloys in high-temperature applications. Aluminides are especially interesting because they are stable up to the critical temperature of order...
Considering the biocidal, sorption and photocatalytic performance of parent Cu2O, in order to prevent the release of its nanostructures into the cleaned media, a Cu2O deposit was introduced into the matrix of a synthetic porous material whereby a hybrid ion exchanger (HIX) was obtained. Two commercially available strongly basic anion exchangers wit...
A major challenge in materials engineering is the development of new materials and methods and/or novel combination of existing ones, all fostering innovation. For that reason, this study aims at the synergy between low-pressure cold spray (LPCS) as a tool for coating deposition and sol-gel technique for fabrication of the feedstock powder. The com...
Figure S1: Scheme of functionalization process,
Figure S2: Wettability of coating SiO2–Fx as a measure of contact
angle (where x denotes the added amount of FOTS),
Figure S3: SEM images of substrate material (a–1,a–2) after
sand-blasting and (b–1,b–2) after cold-spraying with SiO2–F powder on the previously sandblasted substrate,
Figure S4: SE...
Nanocrystalline TiO2 coatings were successfully deposited on metallic substrate surfaces through low-pressure cold spray. Sol–gel amorphous TiO2 dry gel was for the first time used as a feedstock powder. Agglomerated morphology of the amorphous powder with high-density packing of particles and reduced pores number was an important factor for succes...
Ceramic coatings, e.g. TiO2, can be produced by various methods, such as flame spraying, plasma spraying, PVD, CVD, etc. According to the literature, cold spraying enables deposition of plastic materials and therefore is dedicated to metals and polymers. Ceramics are hard and brittle due to the complex crystalline structure. However, very recently...
[This corrects the article DOI: 10.1155/2017/4058636.].
In the article, a study of corrosion resistance of copper and copper-based cermet (Cu+Al2O3 and Cu+SiC) coatings deposited onto aluminum alloy substrate using the low-pressure cold spraying method is presented. The samples were subjected to two different corrosion tests at room temperature: (1) Kesternich test and (2) a cyclic salt spray test. The...
Low-pressure cold spraying is a newly developed technology with high application potential. The aim of this study was to investigate potential application of this technique for producing a new type of transparent conductive oxide films target. Cold spraying technique allows the manufacture of target directly on the backing plate; therefore the prop...
Studies on bonding of aluminium alloys to steels are popular because these are structural materials widely used in a variety of industries. However, joining these dissimilar materials is difficult mainly because of the formation of brittle intermetallic compounds. This paper presents a study on welding aluminium to steel by resistance spot welding....
Different types of titanate one-dimensional nanostructured materials were synthesized and characterized using scanning and transmission electron microscopy, X-ray diffraction and Raman spectroscopy. The results presented in this work unquestionably showed dependence of morphology and structure of the titanate nanopowders on parameters of hydrotherm...
Aluminium/copper contacts occur in power networks made of aluminium alloy busbars. Bolted joints of aluminium and copper cause galvanic corrosion of aluminium in the presence of electrolyte. The paper focuses on the effect of different powder morphology and the addition of ceramics on coating porosity and consequently on corrosion resistance and el...
This article presents a study of corrosion resistance of tin and tin-based composite (Sn + Al2O3 and Sn + SiC) coatings deposited onto aluminium alloy substrates using the low-pressure cold spraying method. The samples were subjected to three different corrosion tests at a room temperature: (i) Kesternich test, (ii) a cyclic salt spray test and (ii...
The crystal structure of PrInO33 was investigated in the temperature range 303 -1123 K by high-resolution neutron-powder diffraction. The PrInO3 adopts highly distorted variant of the perovskite structure with orthorhombic Pnma space group in the whole temperature range investigated. The bond length and bond-angle analysis revealed very slow tenden...
In this work, the size, distribution, morphology and optical absorption properties of silver nanoparticles are regulated by controlling the type of spherical silica substrate. Two different types of SiO2 microparticles with unmodified and amino-functionalized surface are used as a matrix for Ag nanocrystals deposition. In both cases, silver ions ar...
Synthesis conditions, structural, magnetic and transport properties have been studied for SrCo{sub 1-x}ReâO{sub 3-δ} samples with x = 0.1, 0.25, 0.5. SrCo{sub 0.9}Re{sub 0.1}O{sub 3-δ} forms in air and remains stable on cooling indicating that small amounts of Re{sup 7+} stabilize a B-site disordered Pm-3m phase inhibiting formation of a hexagona...
Background. Biodegradable carrier materials with nontoxic degradation products are very valuable for delivering drugs and biologically active molecules. Many organic systems (such as liposomes, micelles and polymeric nano-particles) and inorganic systems (metal oxides and silica) have been researched for delivering active substances to organs. Sili...
This paper presents a method of antibacterial and fungicidal active particles production and conditions of their use in textile-polymeric coating materials with a wide range of prac-tical applications, including clothing or health preventive measures. The functional anti-bacterial and fungicidal active particles reported here consist of silica subm...
Brzeziński, S.; Malinowska, G.; Kowalczyk, D.; Kaleta, A.; Borak, B.; Jasiorski, M.; Dąbek, K.; Baszczuk, A.; Tracz, A. Antibacterial and Fungicidal Coating of Textile-polymeric Materials Filled Abstract This paper presents a method of antibacterial and fungicidal active particles production and conditions of their use in textile-polymeric coating...
Biodegradable carrier materials with nontoxic degradation products are very valuable for delivering drugs and biologically active molecules. Many organic systems (such as liposomes, micelles and polymeric nanoparticles) and inorganic systems (metal oxides and silica) have been researched for delivering active substances to organs. Silica seems to b...
The aim of this study was to investigate antimicrobial activity of textiles doped with silver in different forms. Three types
of textiles were prepared and examined: textiles doped with commercially available Ag nanoparticles, textiles doped with commercial
colloidal silver and textiles doped with silver silica SiO2/Ag spheres. The specimens of sil...
Mixed oxides with the perovskite-like structure possessing mixed electronic and ionic electrical conductivities are proposed for dense ceramic membranes production for both oxygen separation and oxy-combustion processes. In this study three perovskite-type mixed oxides La0,6Sr0,4Fe0,8Co0,2O3+δ (LSCF), Ba0,5Sr0,5Co0,8Fe0,2O3+δ (BSCF) and La2Ni0,9Co0...
Pure and calcium-doped silica and titanium dioxide thin films were prepared by the sol-gel method. Two different metallic substrates, i.e. stainless steel (316L) and titanium alloy (Ti6Al4V), were used for thin film deposition. Physicochemical properties and roughness of the thin films derived were investigated using the Raman spectroscopy, X-ray d...
Sol-gel technology has attracted considerable attention due to possibility of obtaining submicron and nano-sized materials.
The method of silica and titania nanopowders and thin films obtaining will be presented. Also properties and prospective application
of these materials will be express. Additionally, methods of obtaining nanomaterials with dif...
The attractive physical properties of RE1-xSrxCoOy (RE - rare earth and Y) are strongly dependent upon overall oxygen content y and the ordering of oxygen and RE/Sr, as well as charge and spin ordering on the Co^3+/Co^4+- sites. Structural, magnetic and thermoelectric properties of Ho1/3Sr2/3CoOy have been studied within the oxygen content range 2....
Structural, magnetic, and thermoelectric properties of Ho1∕3Sr2∕3CoO3−δ have been studied within the oxygen content range 2.67<3−δ<2.80. The studied samples demonstrate antiferromagnetic order (G type) and semiconductive behavior. No ferromagnetic ordering has been observed in contrary to a recent study [ A. Maignan et al. J. Solid State Chem. 178...
The sol–gel submicron spherical silica particles were obtained with the modified Stöber method using methanol. Iron and nickel dopants produced by the exploding wire method were introduced to the SiO2 powders during the sol–gel process. The electron microscopy and laser diffraction particle size analyzer studies showed that the hybrid powders agglo...
Magnetic powders based on metallic iron crystallites encapsulated in submicron-sized spherical silica particles have been
obtained and investigated. The metallic iron clusters have been produced by the exploding wire method. The silica shells have
been prepared via the modified sol-gel Stöber method and the metallic particles have been entrapped by...
Magnetic powders based on metallic nickel nanoparticles encapsulated in submicron-sized spherical silica shells have been obtained and investigated. The nickel clusters were produced by the exploding wire method. The silica shells were prepared via the modified sol-gel Stöber method, and the metallic particles were entrapped by their occlusion duri...
We report on the magnetic, resistive, and structural studies of perovskite La$_{1/3}$Sr$_{2/3}$CoO$_{3-\delta}$. By using the relation of synthesis temperature and oxygen partial pressure to oxygen stoichiometry obtained from thermogravimetric analysis, we have synthesized a series of samples with precisely controlled $\delta=0.00-0.49$. These samp...
Two new layered perovskite compounds Ba3InBiO7-x and Ba4InBiO8-x have been synthesized by solid-state reaction. Rietveld structural refinement of X-ray powder diffraction data verify that Ba3InBiO7-x and Ba4InBiO8-x are n = 2 and 1 members of the Ruddlesden-Popper series. Both compounds upon exposure to air readily form hydrates by intercalation wa...
The europium doped SrIn2O4 phases have been prepared by solid state reaction. Their IR and Raman, luminescence, excitation spectra have been measured. It was found that Eu ions occupy both strontium and indium positions of the SrIn2O4 unit cell leading to the blue broad band luminescence centered at 480 nm and the sharp f-f transitions associated w...
Structural, magnetic, and high-temperature thermogravimetric and resistive properties of stoichiometric RMnO3 (R=La, Pr, Nd, Sm, and Dy) and isotopically pure 153EuMnO3 perovskites have been studied. The structural parameters of 153EuMnO3 from neutron powder diffraction have been found to perfectly correlate with those for the other RMnO3 compounds...
Structural, magnetic, and high-temperature thermogravimetric and resistive properties of stoichiometric RMnOâ (R=La, Pr, Nd, Sm, and Dy) and isotopically pure ¹âµÂ³EuMnOâ perovskites have been studied. The structural parameters of ¹âµÂ³EuMnOâ from neutron powder diffraction have been found to perfectly correlate with those for the other RMnOâ c...
We report on the magnetic, resistive, and structural studies of
perovskite La1/3Sr2/3CoO3-δ. By
using the relation between the temperature, partial oxygen pressure and
the oxygen content from the thermogravimetric analysis, we have to
synthesized a series of samples with precisely controlled
δ=0.00-0.49. The samples show significant coupling among...
Investigations of phase relations in the Ba-rich part of the In2O3–BaO(CO2)–CuO pseudo-ternary system at 900°C have revealed the existence of new indium–copper oxycarbonate – Ba4In0.8Cu1.6(CO3)0.6O6.2. Rietveld refinement of the X-ray powder diffraction data combined with infrared studies gives evidence that this phase is a oxycarbonate crystallisi...
Investigations of phase relations in the Ba-rich part of the In2O3-BaO(CO2)-CuO pseudo-ternary system at 900 degreesC have revealed the existence of new indium-copper oxycarbonate - Ba2In0.8Cu1.6(CO3)(0.6)O-6.2. Rietveld refinement of the X-ray powder diffraction data combined with infrared studies gives evidence that this phase is a oxycarbonate c...
A new indium copper oxycarbonate Ba2CuInx(CO3)1−xO2+2.5x+δ, existing for 0.0625≤x≤0.25 in the In2O3–BaO(CO2)–CuO pseudo-ternary system, has been identified and characterised. Rietveld refinement of powder X-ray diffraction data combined with electron microscope studies shows that this phase crystallises in the tetragonal system (space group P4/mmm)...
