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Title:Improved photocatalytic activity of anatase-rutile nanocomposites induced by low-temperature sol-gel Sn-modification of TiO2
Authors:ID Maver, Ksenija, UNG (Author)
ID Arčon, Iztok, UNG (Author)
ID Lavrenčič Štangar, Urška, UNI-LJ (Author)
ID Fanetti, Mattia, UNG (Author)
ID Emin, Saim, UNG (Author)
ID Valant, Matjaž, UNG (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 Sn-modified TiO2 photocatalysts are prepared by low-temperature sol-gel processing based on organic titanium and tin precursors with varied Sn concentrations (from 0.1–20 mol .%). The role of Sn dopant as the promotor of the formation of TiO2 rutile crystalline phase is explained and the optimal Sn concentration for preparation of efficient Sn-modified titania photocatalyst is determined. Up to 40 % increase in photocatalytic activity is achieved in Sn-modified TiO2 photocatalytic thin films dried at 150 °C with low Sn concentrations in the range from 0.1 to 1 mol .%. At low Sn concentrations optimal ratio between anatase and rutile (nano)crystals is obtained, which facilitates charge separation at the TiO2 photocatalyst’s surface. When the concentration of Sn increases above 5 mol.% or when the films are calcined at 500 °C, the relative amount of rutile phase with inferior photocatalytic activity, increases and the nanocrystals of titania grow, leading to fewer active sites per unit mass and the reduction of activity in comparison to unmodified TiO2.
Keywords:Anatase-rutile Sn-modified TiO2 XAS analysis Photocatalytic activity
Publication version:Version of Record
Year of publishing:2020
Number of pages:6
Numbering:0
PID:20.500.12556/RUNG-5024-1e0e2e5d-cdee-3b3f-3219-cff581a6a792 New window
COBISS.SI-ID:5565179 New window
DOI:10.1016/j.cattod.2020.01.045 New window
NUK URN:URN:SI:UNG:REP:IDR3LY3E
Publication date in RUNG:10.02.2020
Views:3136
Downloads:0
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Record is a part of a journal

Title:Catalysis Today
Year of publishing:2020

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:10.02.2020

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