Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Aija KRŪMIŅA"'
Publikováno v:
Medžiagotyra, Vol 22, Iss 1, Pp 70-73 (2016)
In the present study, four refractory carbides – TiC, NbC, TaC and SiC - have been produced by carbothermal reduction of a precursor prepared by sol-gel and coat-mix (SiC) process. Binary hydrogels, in which the oxide gel and a pyrolysable organic
Externí odkaz:
https://doaj.org/article/b1ce481c9fc442db8f13b7a6d1c0f80e
Publikováno v:
Medžiagotyra, Vol 18, Iss 1, Pp 72-74 (2012)
Crystalline boron suboxide B6O particles with size in the range of 1.5 µm – 2 µm and crystallite size in the range of 32 nm – 40 nm were prepared by calcination at 1400 °C for one or two hours of precursors obtained by mixing X-ray amorphous b
Externí odkaz:
https://doaj.org/article/9b6845c4dbd64280a68a090fb76f4fe1
Publikováno v:
Key Engineering Materials. 903:149-154
Due to its to its optical, thermal, photocatalytic and electrophysical properties, nanocrystalline titanium oxide (TiO2) is widely used in various fields. In the present work, a series of pure and Gd-modified (0.5, 5, 50 mol%) TiO2 nanocrystalline po
Publikováno v:
Key Engineering Materials. 850:267-272
Due to its magnetic, electrical, absorption, and emission properties, nanoscale gadolinium oxide is widely used in various fields. In this research, nanocrystalline Gd2O3 powders and films on glass substrates have been produced by the extraction-pyro
Publikováno v:
Key Engineering Materials. 850:48-53
1.25 – 5wt%Pt/Al2O3, 1.25 – 5wt%Pd/Al2O3, 1wt%Pd/TiO2, 1 – 5wt%Pd/TiO2-NF, 1.25wt%Pt+1.25wt%Pd/Al2O3, 5wt%Pt/SiO2, 5wt%Pt/C catalysts were synthesised and tested in the selective oxidation of 1,2-propanediol by molecular oxygen. It was found th
Publikováno v:
Key Engineering Materials. 850:279-284
In the present study, seven refractory compounds - TiC, NbC, TaC, WC, Ti (C,N), (Ti,Nb)(C,N) and TiN - have been produced by plasma-chemical synthesis and carbothermal reduction process of a precursor prepared by sol-gel method. The phase composition
Publikováno v:
Key Engineering Materials. 788:102-107
In order to improve TiO2 photocatalytic activity ZnFe2O4/TiO2 nanocomposites with different ZnFe2O4 mass loading were produced. Obtained ZnFe2O4 nanoparticles were coupled with TiO2 via microwave-assisted hydrothermal method in order to improve photo
Publikováno v:
Key Engineering Materials. 788:68-73
Thin films of ZnO, ZnO coated with TiO2 and ZnO modified with titania were prepared by using simple spray pyrolysis of zinc and titanium containing solutions. The photicatalytic activity of the obtained films was determined by degradation of MB solut
Publikováno v:
Solid State Phenomena. 267:93-97
Zinc oxide nanoparticles doped with 0.2–1.5 mol% of Fe, Ni or Co and co-doped with 1 mol% of Ag were prepared by co-precipitation method and their photocatalytic activity in degradation of MB (methylene blue) water solution under ultraviolet irradi
Publikováno v:
Key Engineering Materials. 721:383-388
In the present work formation of macro-size TiO2 nanofiber layers in microwave synthesis were studied. Anatase nanopowder and 10M KOH solution were used as raw materials. Microwave assisted synthesis method permitted to obtain TiO2 nanofibres contain