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Naslov:Correlations between photocatalytic activity and chemical structure of Cu-modified TiO2–SiO2 nanoparticle composites
Avtorji:ID Čižmar, T., UNG (Avtor)
ID Lavrenčič Štangar, Urška, UNG (Avtor)
ID Arčon, Iztok, UNG (Avtor)
Datoteke: Gradivo nima datotek, ki so prostodostopne za javnost. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
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
Leto izida:2016
Št. strani:10
Številčenje:283
PID:20.500.12556/RUNG-2911-ed94bdae-c2f4-0424-f019-ccdfe037f56c Novo okno
COBISS.SI-ID:4639227 Novo okno
DOI:10.1016/j.cattod.2016.11.039 Novo okno
NUK URN:URN:SI:UNG:REP:ZEK2TWDL
Datum objave v RUNG:17.01.2017
Število ogledov:6570
Število prenosov:0
Metapodatki:XML DC-XML DC-RDF
:
ČIŽMAR, T., LAVRENČIČ ŠTANGAR, Urška in ARČON, Iztok, 2016, Correlations between photocatalytic activity and chemical structure of Cu-modified TiO2–SiO2 nanoparticle composites. Catalysis Today [na spletu]. 2016. Vol. 283. [Dostopano 13 april 2025]. DOI 10.1016/j.cattod.2016.11.039. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=2911
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Gradivo je del revije

Naslov:Catalysis Today
Založnik:Elsevier
Leto izida:2016
ISSN:0920-5861

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