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Materials Science Poland
EN This work presents experimental studies of a planar diode made of the layers of indium tin oxide, titanium dioxide, palladium phthalocyanine and gold. The current rectification ratio was 105 at 1.5 V. The analysis of the electrical properties of the system was based on small signal complex capacitan[...]
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Physicochemical Problems of Mineral Processing
EN Carbon dioxide and water vapor were effectively photoconverted to methane using either pure or modified-TiO2 and UV-Vis irradiation. The process of photoconversion in the gas phase was carried out in a tubular reactor equipped with a perforated TiO2-coated support. The effect of selected parameters [...]
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Bulletin of the Polish Academy of Sciences. Technical Sciences
EN The present work reports results of an effort to produce a stack multilayer optical filter on a poly(ethylene terephtalate) (PET) substrate, using a PECVD technique. Titanium dioxide type of material (n550 = 2.3) has been selected for high refractive index layers while that of silicon dioxide type ([...]
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Polish Journal of Chemistry
EN It has been shown that photocatalytic activity, surface electroconductivity, and magnetic susceptibility of TiO2 significantly depend on the character and concentration of f-element’s admixture as well as on the temperature and conditions of its thermo-treating. Admixtures of f-elements with variabl[...]
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Polish Journal of Chemistry
2007 Vol. 81, nr 10 1785-1805
EN New TiO2 based materials doped with W(VI) compounds have been synthesized.We recorded diffusion reflection and absorption spectra and determined phase composition of thematerials. It has been found that thematerials containing 0.01–5.0mass%of the dope exist in the crystalline form of anatase while 1[...]
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Molecular and Quantum Acoustics
2006 Vol. 27 133-139
EN A single thin film sensor structure of TiO2(~60nm) , has been studied for gas-sensing application at ~300C and ~400C. The sensor structures were obtained by RF sputtering technology from titanium target in a controlled atmosphere Ar:O2(3:1) in a vacuum 2x10-3mbar onto a LiNbO3 substrate (Y- cut Z-p[...]
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Polish Journal of Chemistry
EN Anatase-type TiO2 composites with various allotropic forms of carbon (carbon nanotubes, carbon nanofibers and activated carbon) were prepared and characterized by X-ray diffraction (XRD), nitrogen adsorption, thermogravimetry-differential scanning calorimetry (TG-DSC), Fourier-transform infrared (FT[...]
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Polish Journal of Chemistry
2001 Vol. 75, nr 10 1543-1551
EN The zeolite-Y entrapped ruthenium tris-2,2_-bipyridine complex, in 1% wt. metallized with platinum (Z-[Ru(bpy)3]2+/Pt), has been examined as a new photocatalyst for wastewater treatment in flow reactors of the pilot plant at the Plataforma Solar de Almeria, in Spain. The catalyst generated by the te[...]
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Physicochemical Problems of Mineral Processing
2001 Vol. 35 195-205
PL W badaniach wykorzystano biel tytanową marki R-211 produkowaną przez Zakłady Chemiczne Police S.A.. Modyfikację powierzchni bieli tytanowej prowadzono w celu zmiany jej charakteru fizykochemicznego. W tym celu do modyfikacji zastosowano silanowe związki wiążące z następującymi grupami funkcyjnymi: m[...]
EN In the studies, type R-211 was used, produced by Chemical Works, Police S.A. (Poland). Surface modification of titanium white was performed in order to alter its physicochemical character. In this aim, silane coupling agents were used, carrying methacryloxy, vinyl and amine groups. Basic characteris[...]
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Polish Journal of Chemistry
EN Novel semiconductive materials containing TiO2 dispersion, doped with zinc and additional modifying salts of Cu2+, Fe2+, and Co2+, have been obtained. Such materials can be used as effective catalysts in the Cu2+ reduction. Exposition to UV-light followed by the dark storage leads to complex changes[...]
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Polish Journal of Chemistry
EN It has been found that modification of TiO2 by impregnation with Pd2+, Cu2+, Fe2+, Fe3+ and Co2+ salts causes a significant rise of its catalytic activity in the reaction of metal copper deposition. Influence of nature of modifying cation, its concentration, counter-anion concentration and the effec[...]
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Nukleonika
EN Three nCo,N-TiO2 nanocomposites (where cobalt concentration index n = 1, 5 and 10 wt %) were prepared and investigated by magnetic resonance spectroscopy at room temperature. Ferromagnetic resonance (FMR) lines of magnetic cobalt agglomerated nanoparticle were dominant in all registered spectra. The[...]
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Archives of Metallurgy and Materials
EN In this study titanium dioxide nanopowder has been manufactured and examined. Nanocrystalline TiO2 powder has been obtained by hydrolysis and peptization of a solution of titanium isopropoxide and isopropanol. Subsequently, produced powder has been subjected to structural analysis by usin[...]
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Physicochemical Problems of Mineral Processing
2010 Vol. 45 99-112
EN Photocatalytic activity of Ag/TiO2 composites obtained by photoreduction treatment (PRT) was investigated. The composite materials, containing 1.0 and 2.1 wt% of silver nanoparticles were obtained by depositing silver on the Evonic-Degussa P25 titania surface. Ag/TiO2 samples were examined by SEM, X[...]
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Przemysł Chemiczny
1998 T. 77, nr 9 328-334
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Polish Journal of Chemical Technology
EN The paper presents a simple way to improve the photocatalytic properties of titanium dioxide using mechanochemical method. The TiO2 (Anatase) powders was subjected to high-energy ball milling in dry environment and in methanol. It has been shown that it is possible to induce the phas[...]
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Engineering of Biomaterials
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Engineering of Biomaterials
EN Two types of phosphate glasses 50Na2O-20B2O3-30P2O5 (NBP) and 30CaO-20Na2O-50P2O5 (CNP) with different content of TiO2 (0, 3 and 5 mol%) have been prepared by melt-quenching process. TiO2 was added to increase glass network stability. Physical properties of glasses were investigated by density measu[...]
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Opto - Electronics Review
EN TiO₂:Au nanocermets and TiO₂ thin films covered with gold precipitates were obtained from RF reactive sputtering of mosaic Au:Ti or metallic Au targets. The influence of gold content, deposition temperature and post-deposition annealing on photoanodic behaviour and the structure of the obtained mate[...]
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Optica Applicata
EN Titanium dioxide nanoparticles (NP) and nanofibers (NF) were incorporated from polymeric gels into porous glasses. Two types of glasses A and B with different porosity were chosen for measurements. Optical absorbance and photoluminescence spectra of the samples were measured at the range of 200-1100[...]
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