Novel synthesis of ZrxTi1-xOn mixed oxides using titanyl sulphate and pressurized hot and supercritical fluids, and their photocatalytic comparison with sol-gel prepared equivalents

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F17%3A10237585" target="_blank" >RIV/61989100:27640/17:10237585 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/17:10364369 RIV/61989100:27710/17:10237585 RIV/00216275:25310/17:39911955
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0025540817304920" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0025540817304920</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.materresbull.2017.07.023" target="_blank" >10.1016/j.materresbull.2017.07.023</a>

Result language
angličtina
Original language name
Novel synthesis of ZrxTi1-xOn mixed oxides using titanyl sulphate and pressurized hot and supercritical fluids, and their photocatalytic comparison with sol-gel prepared equivalents
Original language description
ZrxTi1-xOn mixed oxides with five various molar ratios of Zr:Ti and their parent oxides were prepared, combining thermal hydrolysis (H) with pressurized hot water crystallization and supercritical methanol drying. Their photoactivity was compared to equivalent materials prepared by sol-gel (G) method. Zr0.1Ti0.9On-G was the most photoactive mixed oxide, which showed significantly higher photoactivity than Zr0.1Ti0.9On-H. Higher photoactivity of Zr0.1Ti0.9On-G can be attributed to phase composition (anatase-brookite phase mixture) and smaller TiO2 anatase crystallite-size. The Zr dopation in TiO2 did not improve the photoactivity neither of sol-gel-synthetized, nor thermal hydrolysis-synthetized mixed oxides in AO7 photodegradation. Zr in higher loadings (>10 mol%) formed separate monoclinic and tetragonal ZrO2 and monoclinic zirconium titanates. Unlike Zr4+ ions in Zr doped TiO2 the separate monoclinic and tetragonal ZrO2 and monoclinic zirconium titanates did not serve as electron trapping centres but as electron-hole recombination centres. The Zr loading in TiO2 should be below 10 mol%. (C) 2017 Published by Elsevier Ltd.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project
<a href="/en/project/GA14-23274S" target="_blank" >GA14-23274S: Unconventional preparation of nanostructured metal oxides by using pressurized and supercritical fluids</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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