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The effect of Zr loading in Zr/TiO 2 prepared by pressurized hot water on its surface, morphological and photocatalytic properties

Lang, Jaroslav ; Matějová, Lenka ; Matěj, Zdeněk LU orcid ; Čapek, Libor ; Martaus, Alexandr and Kormunda, Martin (2019) In Journal of Sol-Gel Science and Technology 90(2). p.369-379
Abstract


Zr/TiO
2
anatase photocatalysts with 0.5, 1, 2, 5 and 7.5 mol.% Zr were prepared using pressurized hot water crystallization and their photocatalytic activity was explored in acid orange 7 photodegradation. Parent TiO
2
was also prepared and tested. From all tested photocatalysts, 2 mol.% Zr/TiO
2
... (More)


Zr/TiO
2
anatase photocatalysts with 0.5, 1, 2, 5 and 7.5 mol.% Zr were prepared using pressurized hot water crystallization and their photocatalytic activity was explored in acid orange 7 photodegradation. Parent TiO
2
was also prepared and tested. From all tested photocatalysts, 2 mol.% Zr/TiO
2
showed the highest photoactivity, and 7.5 mol.% Zr/TiO
2
showed the lowest photoactivity. The poor photoactivity of 7.5 mol.% Zr/TiO
2
can be explained by the amorphous ZrO
2
present in the surface layer (~1–3 μm depth) of TiO
2
anatase nanocrystallite agregates which changed the aggregate morphology and shielded the anatase nanocrystallite surface. The type and amount of defects (e.g., oxygen vacancies, lattice defects) did not effect the photoactivity of Zr/TiO
2
in AO7 photodegradation. The addition of Zr to TiO
2
significantly affects the photocatalyst morphology and the location where amorphous ZrO
2
forms. The optimal Zr loading in TiO
2
was determined to be 2 mol.%. [Figure not available: see fulltext.]

(Less)
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Photocatalysis, Pressurized hot water crystallization, Subcritical water, Zirconium; Titanium dioxide
in
Journal of Sol-Gel Science and Technology
volume
90
issue
2
pages
369 - 379
publisher
Springer
external identifiers
  • scopus:85063342516
ISSN
0928-0707
DOI
10.1007/s10971-019-04956-x
language
English
LU publication?
yes
id
3158eab8-99b2-475a-95cc-46567147af06
date added to LUP
2019-04-08 13:45:50
date last changed
2023-08-16 12:58:49
@article{3158eab8-99b2-475a-95cc-46567147af06,
  abstract     = {{<p><br>
                                                         Zr/TiO                             <br>
                            <sub>2</sub><br>
                                                          anatase photocatalysts with 0.5, 1, 2, 5 and 7.5 mol.% Zr were prepared using pressurized hot water crystallization and their photocatalytic activity was explored in acid orange 7 photodegradation. Parent TiO                             <br>
                            <sub>2</sub><br>
                                                          was also prepared and tested. From all tested photocatalysts, 2 mol.% Zr/TiO                             <br>
                            <sub>2</sub><br>
                                                          showed the highest photoactivity, and 7.5 mol.% Zr/TiO                             <br>
                            <sub>2</sub><br>
                                                          showed the lowest photoactivity. The poor photoactivity of 7.5 mol.% Zr/TiO                             <br>
                            <sub>2</sub><br>
                                                          can be explained by the amorphous ZrO                             <br>
                            <sub>2</sub><br>
                                                          present in the surface layer (~1–3 μm depth) of TiO                             <br>
                            <sub>2</sub><br>
                                                          anatase nanocrystallite agregates which changed the aggregate morphology and shielded the anatase nanocrystallite surface. The type and amount of defects (e.g., oxygen vacancies, lattice defects) did not effect the photoactivity of Zr/TiO                             <br>
                            <sub>2</sub><br>
                                                          in AO7 photodegradation. The addition of Zr to TiO                             <br>
                            <sub>2</sub><br>
                                                          significantly affects the photocatalyst morphology and the location where amorphous ZrO                             <br>
                            <sub>2</sub><br>
                                                          forms. The optimal Zr loading in TiO                             <br>
                            <sub>2</sub><br>
                                                          was determined to be 2 mol.%. [Figure not available: see fulltext.]                         <br>
                        </p>}},
  author       = {{Lang, Jaroslav and Matějová, Lenka and Matěj, Zdeněk and Čapek, Libor and Martaus, Alexandr and Kormunda, Martin}},
  issn         = {{0928-0707}},
  keywords     = {{Photocatalysis; Pressurized hot water crystallization; Subcritical water; Zirconium; Titanium dioxide}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{369--379}},
  publisher    = {{Springer}},
  series       = {{Journal of Sol-Gel Science and Technology}},
  title        = {{The effect of Zr loading in Zr/TiO                         
                        <sub>2</sub>
                                                  prepared by pressurized hot water on its surface, morphological and photocatalytic properties}},
  url          = {{http://dx.doi.org/10.1007/s10971-019-04956-x}},
  doi          = {{10.1007/s10971-019-04956-x}},
  volume       = {{90}},
  year         = {{2019}},
}