| Title: | Effect of Ce:Ti ratio and cerium salts on the properties of mesoporous Ti-Ce oxides and their photocatalytic activity |
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| Authors: | ID Nadrah, Peter (Author)
ID Knap, Mateja (Author)
ID Vikram Sagar, T. (Author)
ID Sever Škapin, Andrijana (Author)
ID Lavrenčič Štangar, Urška (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S0920586125000227
 PDF - Presentation file, download (1,84 MB)
MD5: 7F3E9F07469AB28F6B9934F292DCDEA4
PDF - Supplement, download (14,57 MB)
MD5: 98C009F1D16034FE3F8EAA206E6F019D
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
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| Abstract: | To investigate the influence of different CeO2 precursors and Ce:Ti ratios, we have synthesised 8 mesoporous Ti-Ce oxides via the evaporation-induced self-assembly (EISA) method with Ce:Ti ratios between 0.2 and 20 mol%.The materials exhibited type IV isotherms and a specific surface area of 140–180 m2⋅g 1 with pore diameters in range of 3–20 nm. The crystalline phases of materials comprised predominantly anatase with a significant decrease in overall crystalline content with increasing Ce:Ti ratio. Materials with higher Ce:Ti ratio showed an increased light absorption in the visible region. Although crystalline CeO2 was not detected, the presence of Ce(IV) was confirmed by X-ray photoelectron spectroscopy. For the photocatalytic experiments, we compared these materials with the TiO2-CeO2 composites of our previously published syntheses to yield 16 samples synthesized via three synthesis approaches: (1) concurrent synthesis from titanium alkoxide and cerium salts in one pot, (2) synthesis of TiO2 in the presence of previously-synthesised CeO2 and (3) physical mixing of separately-synthesised TiO2 and CeO2. Samples produced by physically mixing the separately-synthesised TiO2 and CeO2 showed the best photocatalytic activity towards gaseous isopropanol degradation, while the samples with TiO2 synthesised in the presence of CeO2 showed the best photocatalytic stability. |
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| Keywords: | Ti-Ce oxides, evaporation-induced self-assembly, isopropanol oxidation, photocatalysis, mesoporous material |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 16.01.2025 |
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| Publisher: | Elsevier Science |
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| Year of publishing: | 2025 |
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| Number of pages: | str. 1-15 |
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| Numbering: | Vol. 449, [article no.] 115204 |
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| PID: | 20.500.12556/DiRROS-21379  |
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| UDC: | 54 |
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| ISSN on article: | 1873-4308 |
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| DOI: | 10.1016/j.cattod.2025.115204 |
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| COBISS.SI-ID: | 223125507 |
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| Copyright: | © 2025 The Authors. Published by Elsevier B.V. |
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| Note: |
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| Publication date in DiRROS: | 30.01.2025 |
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| Views: | 694 |
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| Downloads: | 486 |
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