Repozitorij Univerze v Novi Gorici

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Naslov:Surface modified titanium dioxide using transition metals : nickel as a winning transition metal for solar light photocatalysis
Avtorji:Šuligoj, Andraž (Avtor)
Arčon, Iztok (Avtor)
Mazaj, Matjaž (Avtor)
Dražić, Goran (Avtor)
Arčon, Denis (Avtor)
Cool, Pegie (Avtor)
Lavrenčič Štangar, Urška (Avtor)
Novak Tušar, Nataša (Avtor)
Datoteke:Gradivo nima datotek. 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 (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Titanium dioxide has been widely used as an antimicrobial agent, UV-filter and catalyst for pollution abatement. Herein, surface modifications with selected transition metals (Me) over colloidal TiO2 nanoparticles and immobilization with a colloidal SiO2 binder as composite films (MeTiO2/SiO2) on a glass carrier were used to enhance solar-light photoactivity. Colloidal TiO2 nanoparticles were modified by loading selected transition metals (Me ¼ Mn, Fe, Co, Ni, Cu, and Zn) in the form of chlorides on their surface. They were present primarily as oxo-nanoclusters and a portion as metal oxides. The structural characteristics of bare TiO2 were preserved up to an optimal metal loading of 0.5 wt%. We have shown in situ that metal-oxo-nanoclusters with a redox potential close to that of O2/O2 were able to function as co-catalysts on the TiO2 surface which was excited by solar-light irradiation. The materials were tested for photocatalytic activity by two opposite methods; one detecting O2 (reduction, Rz ink test) while the other detecting OH (oxidation, terephthalic acid test). It was shown that the enhancement of the solar-light activity of TiO2 by the deposition of transition metal oxo-nanoclusters on the surface depends strongly on the combination of the reduction potential of such species and appropriate band positions of their oxides. The latter prevented excessive self-recombination of the photogenerated charge carriers by the nanoclusters in Ni and Zn modification, which was probably the case in other metal modifications. Overall, only Ni modification had a positive effect on solar photoactivity in both oxidation and reduction reactions.
Ključne besede:surface modified TiO2, XANES, EXAFS, Nickel, solar light photocatalyst
Leto izida:2018
Št. strani:11
Številčenje:21
COBISS_ID:6369818 Povezava se odpre v novem oknu
ISSN pri članku:2050-7488
URN:URN:SI:UNG:REP:NYHZF5DR
DOI:10.1039/C7TA07176K Povezava se odpre v novem oknu
Število ogledov:500
Število prenosov:0
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
Področja:Gradivo ni uvrščeno v področja.
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Skupna ocena:(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.

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Gradivo je del revije

Naslov:Journal of materials chemistry
Skrajšan naslov:J. mater. chem. A
Založnik:RSC Publications
ISSN:2050-7488
COBISS.SI-ID:16502806 Novo okno
Leto izida:2018

Sekundarni jezik

Jezik:Ni določen
Ključne besede:materiali, fotokazaliza, nikel, EXAFS, XANES


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