| Naslov: | Surface modified titanium dioxide using transition metals : nickel as a winning transition metal for solar light photocatalysis |
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| 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) |
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| Datoteke: | Gradivo nima datotek. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u.  |
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| Jezik: | Angleški jezik |
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| Vrsta gradiva: | Delo ni kategorizirano (r6) |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: | UNG - Univerza v Novi Gorici |
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| 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. |
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| Ključne besede: | surface modified TiO2, XANES, EXAFS, Nickel, solar light photocatalyst |
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| Leto izida: | 2018 |
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| Št. strani: | 11 |
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| Številčenje: | 21 |
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| COBISS_ID: | 6369818 |
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| ISSN pri članku: | 2050-7488 |
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| URN: | URN:SI:UNG:REP:NYHZF5DR |
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| DOI: | 10.1039/C7TA07176K |
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| Število ogledov: | 2785 |
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| Število prenosov: | 0 |
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| Metapodatki: |     |
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| Področja: | Gradivo ni uvrščeno v področja. |
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| | | | Skupna ocena: | (0 glasov) |
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| Vaša ocena: | Ocenjevanje je dovoljeno samo prijavljenim uporabnikom. |
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