Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Zbigniew Piskuła"'
Autor:
Waldemar Nowicki, Zbigniew Piskuła, Piotr Kirszensztejn, Dorota Bartkowiak, Erhard Kemnitz, Patrycja Kuźma
Publikováno v:
Arabian Journal of Chemistry, Vol 13, Iss 1, Pp 2620-2627 (2020)
Well-dispersed nanosized clusters of metallic platinum were obtained by decomposition of ethylenediamine complexes immobilized on amorphous silica surfaces. Samples before reduction were obtained by potentiometric titration in a heterogeneous liquid/
Externí odkaz:
https://doaj.org/article/95b641216d1e4f42b4b08681af467f73
Autor:
Emilia Alwin, Michał Zieliński, Agata Suchora, Iwona Gulaczyk, Zbigniew Piskuła, Mariusz Pietrowski
Publikováno v:
Journal of Materials Science. 57:15705-15721
It was observed for the first time that the specific surface area of graphitic carbon nitride (g-C3N4) increased from 32 m2g−1 to 142 and 171 m2g−1 for Pt and Ru, respectively, due to the etching of g-C3N4 by Pt and Ru nanoparticles. Metal nanopa
Publikováno v:
Optical Materials. 84:422-426
Microcrystals of the inorganic red emitting phosphors EuxCa1-1.5xMoyW1-yO4 (x = 0.00667, 0.03333, 0.06667; y = 0, 0.1, …, 0.9, 1) were synthesized by a traditional solid-state method. Studied materials were characterized by X-ray diffraction, infra
Publikováno v:
Journal of Non-Crystalline Solids. 482:78-85
Binary SiO2-MgO oxide systems were synthesized by the sol-gel method and self-combustion method with no addition of water to the starting reaction system, using three types of precursors. The series of SiO2-MgO samples of Si to Mg molar ratios of: 1:
Publikováno v:
Journal of Sol-Gel Science and Technology. 82:574-580
La2O3–SiO2 powders were prepared by the sol–gel and combustion method without addition of strong polar solvents to the initial system. Changes in the crystalline La2O3 structure and modification of surface binary oxides system were described as a
Photo- and electroluminescence properties of lanthanide tungstate-doped porous anodic aluminum oxide
Publikováno v:
Optical Materials. 64:142-146
A new cathode material for the potential use in light-emitting devices, based on porous anodic alumina (PAA), aluminum and ITO layers has been synthesized. Porous alumina samples with ordered pore arrays were prepared electrochemically from high puri
Publikováno v:
Journal of Alloys and Compounds. 840:155635
Silica composite materials doped with lanthanum oxide were studied as supports for catalysts to be used at elevated temperatures. A series of SiO2-La2O3 composites with Si to La molars ratio of 1:0, 1:0.05, 1:0.1, 1:0.25, 1:0.5, 1:1 and 0:1 were synt
Publikováno v:
Protection of Metals and Physical Chemistry of Surfaces. 52:786-792
A series of SiO2–SnO2 samples of the Sn/Si molar fractions of 0.05, 0.1, 0.25, 0.5 and 1.0 were synthesised by the sol-gel method in anhydrous conditions. The SiO2–SnO2 samples were characterised by XRD, low-temperature nitrogen adsorption, SEM,
Publikováno v:
Journal of Rare Earths. 32:221-225
Calcium tungstate phosphors activated by the Ln3+ ions (Ln=Pr, Nd, Tb, Yb) were synthesized by a traditional high-temperature solid-state method. The crystal structures and morphologies of the products were characterized by scanning electron microsco
Autor:
P. Skokowski, Piotr Kirszensztejn, Waldemar Nowicki, T. Toliński, Michał Zieliński, Zbigniew Piskuła
Publikováno v:
Materials Chemistry and Physics. 235:121731
The structure, magnetic and catalytic properties of silica - ferrite nanocomposites were investigated. A series of SiO2-MFe2O4 (M = Mn, Co, Ni, Cu) composites were synthesized by a sol–gel technique using citric acid and glycerin. The samples were