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Query: "keywords" (doping) .

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1.
Metal and non-metal modified titania : the effect of phase composition and surface area on photocatalytic activity
Boštjan Žener, Lev Matoh, Martin Reli, Andrijana Sever Škapin, Romana Cerc Korošec, 2022, original scientific article

Abstract: The application of TiO 2 photocatalysis in various environmental fields has been extensively studied in the last decades due to its ability to induce the degradation of adsorbed organic pollutants. In the present work, TiO 2 powders doped and co-doped with sulfur and nitrogen and modified with platinum were prepared by particulate sol-gel synthesis. PXRD measurements revealed that the replacement of HCl with H 2SO4 during synthesis reduced the size of the crystallites from ~ 30 nm to ~20 nm, increasing the surface area from ~44 m2/g to ~80 m2/g. This is consistent with the photocatalytic activity of the samples and the measured photocurrent behavior of the photocatalysts. The results showed that the prop- erties of the powders (i.e., surface area, crystallite size, photocurrent behavior) depend strongly not only on the type but also on the amount of acid and dopants used in the synthesis. Doping, co-doping and modification of TiO 2 samples with nitrogen, sulfur and platinum increased their photocatalytic activity up to 6 times.
Keywords: titanium dioxide, powders, doping, photocatalysis, photocurrent, SEM
Published in DiRROS: 04.05.2023; Views: 284; Downloads: 122
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2.
Dielectric loss of Si[sub]2N[sub]2O and the influence of Li on its properties
Yong Yang, Ming He, Ting Zhang, Meng-qiang Wu, 2022, original scientific article

Keywords: Si2N2O, dielectric loss, high temperature, Li doping
Published in DiRROS: 22.06.2022; Views: 441; Downloads: 196
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3.
Odvzem vzorcev za kontrolo dopinga
Joško Osredkar, 2009, not set

Keywords: laboratorijska diagnostika, odvzem vzorcev, urin, doping, doping kontrola, šport, športna medicina
Published in DiRROS: 29.04.2016; Views: 4614; Downloads: 681
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4.
Boj proti dopingu v kolesarstvu
Lovro Žiberna, 2014, professional article

Keywords: kolesarstvo, doping
Published in DiRROS: 15.04.2016; Views: 4064; Downloads: 687
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