| Title: | Tuning the photocatalytic activity of nanocrystalline titania by phase composition control and nitrogen doping, using different sources of nitrogen |
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| Authors: | ID Rozman, Nejc (Author)
ID Škrlep, Luka (Author)
ID Gaberšček, Miran (Author)
ID Sever Škapin, Andrijana (Author) |
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| Files: |  PDF - Presentation file, download (503,29 KB)
MD5: 6E53759E7320888B06C1B44CAD7CBC6F
 URL - Source URL, visit https://acsi-journal.eu/index.php/ACSi/article/view/984
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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: | Titania nanoparticles were synthesized by employing the hydrothermal method and using TiOSO4as a titanium source. By varying pH between 0.5 and 1.0 and adding isopropanol to the hydrothermal reaction mixture, different mixtures of anatase, rutile, and brookite were obtained. The samples were also doped with nitrogen at different N concentrations using, respectively, urea, ammonium nitrate, and tripropylamine as nitrogen sources. The samples were characterized by X-ray powder diffraction, field emission scanning electron microscopy, infrared spectroscopy, UV-Vis diffuse reflectance spectroscopy and according to their specific surface area. Additionally, their photocatalytic activity was measured in a gas-solid reactor system. The results show that low pH favours rutile formation, whereas a higher pH yields mixed phase titania polymorphs. Isopropanol addition also favours rutile formation, and boosted the photocatalytic activity of the resulted particles. Contrary to most data in the literature, rutile turned out to be the more active phase in the present investigation. Nitrogen doping, on the other hand, did not contribute to higher photocatalytic activity, but was rather detrimental to it. |
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| Keywords: | titanium dioxide, rutile, hydrothermal synthesis, photocatalysis, nitrogen doping |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 02.09.2014 |
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| Publisher: | Slovensko kemijsko društvo |
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| Year of publishing: | 2014 |
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| Number of pages: | str. 506-516 |
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| Numbering: | Vol. 61, no. 3 |
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| PID: | 20.500.12556/DiRROS-23726  |
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| UDC: | 546.82:549.514.8 |
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| ISSN on article: | 1318-0207 |
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| COBISS.SI-ID: | 2065511 |
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| Publication date in DiRROS: | 26.09.2025 |
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| Views: | 289 |
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| Downloads: | 116 |
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