Repozitorij Univerze v Novi Gorici

Iskanje po repozitoriju
A+ | A- | Pomoč | SLO | ENG

Iskalni niz: išči po
išči po
išči po
išči po
* po starem in bolonjskem študiju

Opcije:
  Ponastavi


11 - 13 / 13
Na začetekNa prejšnjo stran12Na naslednjo stranNa konec
11.
Correlations between photocatalytic activity and chemical structure of Cu-modified TiO [sub] 2-SiO [sub] 2 nanoparticle composites
T. Čižmar, Iztok Arčon, Urška Lavrenčič Štangar, 2016, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: Cu-modified TiO2-SiO2, sol-gel, XANES, EXAFS
Objavljeno v RUNG: 06.02.2017; Ogledov: 4125; Prenosov: 0
Gradivo ima več datotek! Več...

12.
Correlations between photocatalytic activity and chemical structure of Cu-modified TiO2–SiO2 nanoparticle composites
T. Čižmar, Urška Lavrenčič Štangar, Iztok Arčon, 2016, izvirni znanstveni članek

Opis: Copper-modified TiO2–SiO2photocatalysts were prepared by sol–gel method based on organic copper,silicon and titanium precursors. Copper concentration varied from 0.1 to 3.0 mol%. A widely appliedmodel reaction of photocatalytic oxidation of terephtalic acid (TPA) in water solution was used in order toevaluate the catalytic activities of elaborated samples. The crystal structures of the titania components ofall tested titania–silica species were studied using XRD analysis. The influence of Cu2+cation incorporationon the crystal structure of titania, as well as the chemical states and the neighbouring structures of coppercations, have been examined by means of Cu K-edge EXAFS and XANES analysis. The experimental datashow that there is a ten times increase in photocatalytic activity when TiO2–SiO2matrix is modified with0.1 mol% of Cu. It can be supposed that an enhancement of photocatalytic activity of low-concentratedcopper-modified titania–silica nanocomposites is probably due to a close attachment of Cu2+cationsto the surfaces of photocatalytically active TiO2nanoparticles. In this case, Cu2+cations may possiblyact as free electron traps reducing the intensity of recombination between opposite free charge carriers(electrons, holes) available at the photocatalyst’s surface.
Ključne besede: Cu-modified TiO2–SiO2photocatalysts, Titanium dioxide, Metal doping, Cu K-edge XANES, EXAFS, Photocatalytic activitya
Objavljeno v RUNG: 17.01.2017; Ogledov: 5135; Prenosov: 0
Gradivo ima več datotek! Več...

13.
Enhancement of photocatalytic activity of sol-gel TiO[sub]2 thin films with P25
Jerneja Šauta Ogorevc, Peter Bukovec, Urška Lavrenčič Štangar, 2008, izvirni znanstveni članek

Opis: Enhancement of photocatalytic activity of sol-gel TiOsub2 thin films with P25
Ključne besede: TiO[sub]2 thin films, TiCl[sub]4, precursor, sol-gel, peroxo-modified sol, Degussa P25, photodegradation
Objavljeno v RUNG: 17.05.2016; Ogledov: 4475; Prenosov: 28
URL Povezava na celotno besedilo

Iskanje izvedeno v 0.02 sek.
Na vrh