| Title: | Tailoring the crystalline and amorphous phase ratios of TiO2 through the use of organic additives during hydrothermal synthesis |
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| Authors: | ID Rozman, Nejc (Author)
ID Sever Škapin, Andrijana (Author)
ID Tobaldi, David Maria (Author)
ID Dražić, Goran (Author)
ID Nadrah, Peter (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S0272884224029729#bfn1
 PDF - Presentation file, download (3,64 MB)
MD5: D22784C1832C109D1E25B84578440A18
PDF - Supplement, download (1,49 MB)
MD5: B4876BD8B87E9EB21B4899441DEF3305
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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: | The photocatalytic properties of TiO2 are primarily determined by its crystallinity and crystalline phase ratios. To improve the photocatalytic properties of TiO2, greater control over the formation of crystalline and amorphous phases during synthesis is therefore required. In this study, we demonstrate how the addition of minute amounts of three organic compounds (isopropanol, acetone and acetic acid) during hydrothermal treatment affects the amorphous and crystalline phase ratios: the addition of isopropanol or acetone accelerates the phase transition from anatase and brookite to rutile, whereas the addition of acetic acid inhibits the transformation of anatase to rutile, increasing the content of amorphous phase compared to samples where no organic compound was added. We show that the combination of the organic compound added, along with the duration of the hydrothermal treatment, can be used to tailor the phase composition of TiO2, so as to obtain either: i) TiO2 with a high content of both rutile and amorphous phase, ii) TiO2 with a high rutile content and iii) TiO2 with different ratios of all four phases, when the duration of synthesis is short (2–4 h). The materials synthesized exhibited high photocatalytic activity (in most cases higher than P25), which is attributed to the beneficial phase composition and high specific surface area. |
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| Keywords: | sol-gel processes, X-ray methods, chemical properties, TiO2, photocatalysis |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 08.07.2024 |
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| Publisher: | Elsevier |
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| Year of publishing: | 2024 |
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| Number of pages: | str. 37033-37040 |
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| Numbering: | Vol. 50, issueǂ 19, partǂ B |
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| PID: | 20.500.12556/DiRROS-20208  |
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| UDC: | 54 |
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| ISSN on article: | 1873-3956 |
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| DOI: | 10.1016/j.ceramint.2024.07.092 |
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| COBISS.SI-ID: | 202832387 |
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| Copyright: | © 2024 The Authors. |
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| Publication date in DiRROS: | 14.08.2024 |
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| Views: | 307 |
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| Downloads: | 295 |
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