Herald of Kazakh-British technical university,
Journal Year:
2024,
Volume and Issue:
21(1), P. 114 - 122
Published: March 26, 2024
In
this
work,
the
phase
composition
and
microstructure
of
multicomponent
ZrO
2
:WO
3
:Al
O
:MgO
ceramics
were
studied
depending
on
concentration
components.
The
dependences
between
elements
in
initial
charge
composition,
volume
shrinkage,
density
synthesized
samples
are
determined.
It
was
found
by
Raman
spectroscopy
that
addition
an
Al
mixture
to
matrix
does
not
lead
formation
a
solid
solution.
With
increase
content
:MgO,
there
is
volumetric
shrinkage
density,
which
may
be
associated
with
liquid
WO
system
at
temperature
1450
°C
and,
as
result,
more
efficient
migration
pores
defects
surface.
analysis
SEM
images
cross
sections
obtained
showed
all
have
developed
morphology
different
grain
shapes.
APL Materials,
Journal Year:
2024,
Volume and Issue:
12(4)
Published: April 1, 2024
The
current
study
reports
on
the
facile
two-step
hydrothermal
synthesis
of
heterojunction
m-ZnWO4/m-WO3
composite
powders
for
visible
light
sensitive
photocatalytic
applications.
ZnWO4
particles
start
crystallizing
surface
WO3
powder
in
second
stage
reaction
a
basic
medium.
phases
were
confirmed
using
x-ray
diffraction
analysis.
monoclinic
cubic
shaped
and
rod
morphologies
disclosed
from
field
emission
scanning
electron
microscope
images.
Strong
interfacial
adhesion
between
was
unveiled
high-resolution
transmission
microscopy
study.
optimized
5ZW
exhibits
calculated
bandgap
2.58
eV,
positioning
it
within
wavelength
range
(λ
=
400–700
nm).
Furthermore,
there
is
notable
enhancement
average
lifetime
electron–hole
pair
recombination
rate,
which
extended
to
30.3
ns.
demonstrated
96%
methylene
blue
dye
degradation
efficiency
420
min
under
irradiation
at
pH
12.
Due
optimal
phase
fraction
strong
WO3,
scheme
seemed
be
highly
efficient
composite.
Hence,
believed
that
method
can
proficient
route
prepare
composites
alkali
conditions
with
active
photodegradation
efficiency.
Applied Surface Science Advances,
Journal Year:
2023,
Volume and Issue:
18, P. 100541 - 100541
Published: Dec. 1, 2023
The
practical
application
of
powder
photocatalysts
for
visible
light
catalysis
can
be
limited
due
to
the
accumulation
nanoparticles
and
complexity
their
recovery.
Therefore,
photocatalytic
coatings
are
suitable
candidates
pollutant
degradation.
In
this
study,
a
hierarchical
TiO2/WO3
hybrid
coating
was
created
on
Ti
substrate
using
plasma
electrolytic
oxidation
(PEO)
followed
by
hydrothermal
treatment
as
post-treatment.
exhibits
superior
performance
methylene
blue
removal
under
compared
pure
TiO2
coating,
increasing
MB
from
41
88.3
%.
morphology
consists
combination
nanorods.
decrease
in
photoluminescence
(PL)
intensity
indicates
that
inhibits
photo-induced
e−-h+
recombination.
optimal
revealed
exceptional
stability
efficiency
even
after
four
cycles.
impact
parameters
such
concentration
pH
investigated
well.
scavenging
test
results
reveal
main
active
radicals
photocatalysis
hydroxyl
(HO•)
holes
(h+)
species.
According
Mott-Schottky
DRS
(Diffuse
Reflectance
Spectroscopy)
results,
photodegradation
mechanism
proposed.
