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Crystallization of Zr0.1Ti0.9On mixed oxide by pressurized hot water and its effect on microstructural properties and photoactivity

Lang, Jaroslav ; Matějová, Lenka ; Matěj, Zdeněk LU orcid ; Čapek, Libor and Svoboda, Ladislav (2018) In Journal of Supercritical Fluids 141. p.39-48
Abstract

Pressurized hot water crystallization was applied and optimized for preparation of photoactive Zr0.1Ti0.9On mixed oxide. The effect of individual processing conditions (temperature, pressure and water amount) on (micro)structure, textural, optical, electronic and photocatalytic properties in Acid orange 7 photodegradation of prepared Zr0.1Ti0.9On mixed oxide was examined. It was revealed that while the processing temperature had crucial effect on crystallization of Zr0.1Ti0.9On mixed oxide and anatase crystallites growth, the volume of water and pressure did not show any effect. Nevertheless, it was found that pressure as well as... (More)

Pressurized hot water crystallization was applied and optimized for preparation of photoactive Zr0.1Ti0.9On mixed oxide. The effect of individual processing conditions (temperature, pressure and water amount) on (micro)structure, textural, optical, electronic and photocatalytic properties in Acid orange 7 photodegradation of prepared Zr0.1Ti0.9On mixed oxide was examined. It was revealed that while the processing temperature had crucial effect on crystallization of Zr0.1Ti0.9On mixed oxide and anatase crystallites growth, the volume of water and pressure did not show any effect. Nevertheless, it was found that pressure as well as temperature had strong influence on formation of anatase lattice defects of different type and amount and led to changes in mixed oxide photoactivity. The optimal processing conditions leading to the most photoactive Zr0.1Ti0.9On mixed oxide were determined to be 2L of water, 250 °C and 10 MPa.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Crystallization, Photoactivity, Pressurized hot water, Subcritical water, Titania-zirconia mixed oxide
in
Journal of Supercritical Fluids
volume
141
pages
39 - 48
publisher
Elsevier
external identifiers
  • scopus:85044533963
ISSN
0896-8446
DOI
10.1016/j.supflu.2018.03.002
language
English
LU publication?
yes
id
53eaa016-612d-4512-80bc-811ae3acd055
date added to LUP
2018-04-12 15:28:29
date last changed
2023-08-16 12:58:49
@article{53eaa016-612d-4512-80bc-811ae3acd055,
  abstract     = {{<p>Pressurized hot water crystallization was applied and optimized for preparation of photoactive Zr<sub>0.1</sub>Ti<sub>0.9</sub>O<sub>n</sub> mixed oxide. The effect of individual processing conditions (temperature, pressure and water amount) on (micro)structure, textural, optical, electronic and photocatalytic properties in Acid orange 7 photodegradation of prepared Zr<sub>0.1</sub>Ti<sub>0.9</sub>O<sub>n</sub> mixed oxide was examined. It was revealed that while the processing temperature had crucial effect on crystallization of Zr<sub>0.1</sub>Ti<sub>0.9</sub>O<sub>n</sub> mixed oxide and anatase crystallites growth, the volume of water and pressure did not show any effect. Nevertheless, it was found that pressure as well as temperature had strong influence on formation of anatase lattice defects of different type and amount and led to changes in mixed oxide photoactivity. The optimal processing conditions leading to the most photoactive Zr<sub>0.1</sub>Ti<sub>0.9</sub>O<sub>n</sub> mixed oxide were determined to be 2L of water, 250 °C and 10 MPa.</p>}},
  author       = {{Lang, Jaroslav and Matějová, Lenka and Matěj, Zdeněk and Čapek, Libor and Svoboda, Ladislav}},
  issn         = {{0896-8446}},
  keywords     = {{Crystallization; Photoactivity; Pressurized hot water; Subcritical water; Titania-zirconia mixed oxide}},
  language     = {{eng}},
  pages        = {{39--48}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Supercritical Fluids}},
  title        = {{Crystallization of Zr<sub>0.1</sub>Ti<sub>0.9</sub>O<sub>n</sub> mixed oxide by pressurized hot water and its effect on microstructural properties and photoactivity}},
  url          = {{http://dx.doi.org/10.1016/j.supflu.2018.03.002}},
  doi          = {{10.1016/j.supflu.2018.03.002}},
  volume       = {{141}},
  year         = {{2018}},
}