| Title: | Improved photocatalytic activity of anatase-rutile nanocomposites induced by low-temperature sol-gel Sn-modification of TiO2 |
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| 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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| Files: |
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| 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. |
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| Keywords: | Anatase-rutile
Sn-modified TiO2
XAS analysis
Photocatalytic activity |
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| Publication version: | Version of Record |
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| Year of publishing: | 2020 |
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| Number of pages: | 6 |
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| Numbering: | 0 |
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| PID: | 20.500.12556/RUNG-5024-1e0e2e5d-cdee-3b3f-3219-cff581a6a792 |
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| COBISS.SI-ID: | 5565179 |
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| DOI: | 10.1016/j.cattod.2020.01.045 |
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| NUK URN: | URN:SI:UNG:REP:IDR3LY3E |
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| Publication date in RUNG: | 10.02.2020 |
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| Views: | 4287 |
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| Downloads: | 0 |
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