| Title: | Variations of electronic properties on the behavior of visible light-triggered TiO[sub]2 +Au photocatalysts |
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| Authors: | ID Slapničar, Špela (Author)
ID Žerjav, Gregor (Author)
ID Roškarič, Matevž (Author)
ID Zavašnik, Janez (Author)
ID Pintar, Albin (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S0169433225006373?via%3Dihub
 PDF - Presentation file, download (2,79 MB)
MD5: 2E852CE32A329E463C38A73F77B2D807
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  KI - National Institute of Chemistry
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| Abstract: | Au catalysts (1 wt% Au) using anatase TiO2 nanorods (TNR, SBET =106 m2/g) or nanospheres (TNP, SBET =86 m2/g). The majority of Au particles in the prepared TiO2 +Au catalysts were in the range of 20–30 nm, with slight differences observed between the TNR +Au and TNP +Au samples. It is noteworthy that the addition of Au did not significantly change the specific surface area and crystallinity of the TiO2 supports. Evaluation of photocatalytic activity using ABTS•+ cation oxidation, DMPO/DMSO spin trapping and bisphenol A (BPA) degradation under visible-light illumination showed different behaviour of TNR +Au and TNP +Au catalysts. The TNR +Au catalyst produced mainly e-, while the TNP +Au catalyst exhibited efficient O2 •- production, which was confirmed by electron paramagnetic resonance spin trapping analyses. Conversely, due to its high Schottky barrier height (SBH) and the properties of the Au nanoparticles, the TNR +Au catalyst could not facilitate an oxygen reduction reaction but effectively produced e- as it reduced ABTS•+. The results show that the degra dation of BPA in the presence of the TNR +Au photocatalyst occurs through the involvement of e- and a small amount of hydroxyl radicals (OH•). Comprehensive characterization techniques provided insights into the intricate relationships between catalyst structure, composition and catalytic activity. |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 30.06.2025 |
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| Year of publishing: | 2025 |
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| Number of pages: | str. 1-15 |
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| Numbering: | Vol. 695, [article no.] ǂ162923 |
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| Source: | Applied Surface Science |
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| PID: | 20.500.12556/DiRROS-21817  |
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| UDC: | 546 |
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| ISSN on article: | 0169-4332 |
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| DOI: | 10.1016/j.apsusc.2025.162923 |
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| COBISS.SI-ID: | 228881667 |
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| Copyright: | © 2025 The Author(s). Published by Elsevier B.V. |
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| Publication date in DiRROS: | 03.04.2025 |
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| Views: | 693 |
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| Downloads: | 325 |
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