20.500.12556/DiRROS-20208 Tailoring the crystalline and amorphous phase ratios of TiO2 through the use of organic additives during hydrothermal synthesis 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. sol-gel processes X-ray methods chemical properties TiO2 photocatalysis sol-gel procesi rentgenske metode kemijske lastnosti TiO2 fotokataliza true false true Elsevier Angleški jezik Slovenski jezik © 2024 The Authors. Neznano 2024-08-14 09:49:46 2024-08-14 09:58:18 2024-08-16 03:56:53 0000-00-00 00:00:00 2024 0 0 str. 37033-37040 issueǂ 19, partǂ B Vol. 50 Oct. 2024 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 2024-07-08 54 1873-3956 10.1016/j.ceramint.2024.07.092 202832387 https://www.sciencedirect.com/science/article/pii/S0272884224029729#bfn1 1 04e1da8d-5a01-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28288 RAZ_Rozman_Nejc_2024.pdf RAZ_Rozman_Nejc_2024.pdf 1 D22784C1832C109D1E25B84578440A18 c98f8a57bf12e5c4e0e0d5a0f1650e73122629489222ebbdafb6fa85a5a12181 26c3d6c4-5a02-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28289 RAZ_Rozman_Nejc_2024.pdf RAZ_Rozman_Nejc_2024.pdf 1 B4876BD8B87E9EB21B4899441DEF3305 0c4ac920bedaf844dcae2998289f03e5234cd818d7c01e7b73f6faf30ec05760 2fc80a4b-5a02-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28290 Zavod za gradbeništvo Slovenije 0 0 0