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Naslov:Surface modified titanium dioxide using transition metals : nickel as a winning transition metal for solar light photocatalysis
Avtorji:ID Šuligoj, Andraž (Avtor)
ID Arčon, Iztok (Avtor)
ID Mazaj, Matjaž (Avtor)
ID Dražić, Goran (Avtor)
ID Arčon, Denis (Avtor)
ID Cool, Pegie (Avtor)
ID Lavrenčič Štangar, Urška (Avtor)
ID Novak Tušar, Nataša (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: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
PID:20.500.12556/RUNG-3951-6a2cca5a-0c8f-4025-ff89-a470a5e8a48f Novo okno
COBISS.SI-ID:6369818 Novo okno
ISSN pri članku:2050-7488
DOI:10.1039/C7TA07176K Novo okno
NUK URN:URN:SI:UNG:REP:NYHZF5DR
Datum objave v RUNG:01.06.2018
Število ogledov:3587
Število prenosov:0
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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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
Leto izida:2018
ISSN:2050-7488
COBISS.SI-ID:16502806 Novo okno

Sekundarni jezik

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


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