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Title:Photocatalytic Activity of Zirconium- and Manganese- Codoped Titania in Aqueous Media: The Role of the Metal Dopant and its Incorporation Site
Authors:ID Pliekhov, O. L., University of Nova Gorica (Author)
ID Arčon, Iztok, University of Nova Gorica, Jožef Stefan Institute (Author)
ID Novak Tušar, Nataša, National Institute of Chemistry, University of Nova Gorica (Author)
ID Lavrenčič Štangar, Urška, University of Nova Gorica (Author)
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Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:The development of efficient TiO2-based photocatalysts for water treatment is mainly performed by doping with transition metals or by establishing junctions between different phases, metal–semiconductor or semiconductor–semiconductor. We present, for the first time, the synthesis of Zr- and Mn-modified TiO2 by a redesigned sol–gel technique that allows the formation of heterometallic bridges on the TiO2 surface. Cations of the doping metals are located in the pores of mesoporous anatase and attached to the crystalline TiO2 walls. The presence of the Zr enhances the photoactivity of the TiO2 catalyst. However, the introduction of Mn decreases the photocatalytic efficiency in a nonadditive manner. The inhibition effect was assigned to the side reaction between hydroxyl radicals and Mn ions. The fact that Mn effectively scavenges the hydroxyl radicals and, consequently, inhibits the whole oxidation process is direct proof that hydroxyl radicals are the main reactive species in the photocatalytic oxidative processes on TiO2 surfaces in aqueous media and the process of COH generation is the rate-determining step, which was confirmed using a method based on the decolorization of a commercial dye Bezaktiv Blau in a reaction with Fenton’s reagent as a source of hydroxyl radicals.
Keywords:doping, manganese, oxidation, X-ray absorption spectroscopy, zirconium
Publication version:Version of Record
Year of publishing:2016
Number of pages:2109-2118
Numbering:8
PID:20.500.12556/RUNG-2516 New window
COBISS.SI-ID:5943322 New window
DOI:10.1002/cctc.201600206 New window
NUK URN:URN:SI:UNG:REP:LWZMUN63
Publication date in RUNG:21.07.2016
Views:5325
Downloads:0
Metadata:XML DC-XML DC-RDF
:
PLIEKHOV, O. L., ARČON, Iztok, NOVAK TUŠAR, Nataša and LAVRENČIČ ŠTANGAR, Urška, 2016, Photocatalytic Activity of Zirconium- and Manganese- Codoped Titania in Aqueous Media: The Role of the Metal Dopant and its Incorporation Site. ChemCatChem [online]. 2016. Vol. 8, p. 2109–2118. [Accessed 7 April 2025]. DOI 10.1002/cctc.201600206. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=2516
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Record is a part of a journal

Title:ChemCatChem
Shortened title:ChemCatChem
Publisher:Wiley: 12 months
Year of publishing:2016
ISSN:1867-3880

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