Photocatalytic Degradation of Methyl Orange in Wastewater Using TiO2-Based Coatings Prepared by Plasma Electrolytic Oxidation of Titanium: A Review
Reactions,
Год журнала:
2025,
Номер
6(2), С. 25 - 25
Опубликована: Апрель 8, 2025
This
review
analyzes
TiO2-based
coatings
formed
by
the
plasma
electrolytic
oxidation
(PEO)
process
of
titanium
for
photocatalytic
degradation
methyl
orange
(MO)
under
simulated
solar
irradiation
conditions.
PEO
is
recognized
as
a
useful
technique
creating
oxide
on
various
metals,
particularly
titanium,
to
assist
in
organic
pollutants.
photocatalysts
form
are
more
practical
than
powder
because
photocatalyst
does
not
need
be
recycled
and
reused
after
wastewater
treatment,
which
an
expensive
time-consuming
process.
In
addition,
main
advantage
synthesis
its
short
processing
time
(a
few
minutes),
it
excludes
annealing
step
needed
convert
amorphous
TiO2
into
crystalline
phase,
prerequisite
possible
application.
Pure
have
low
efficiency
MO,
due
rapid
recombination
photo-generated
electron/hole
pairs.
this
review,
recent
advances
sensitization
with
narrow
band
gap
semiconductors
(WO3,
SnO2,
CdS,
Sb2O3,
Bi2O3,
Al2TiO5),
doping
rare
earth
ions
(example
Eu3+)
transition
metals
(Mn,
Ni,
Co,
Fe)
summarized
effective
strategy
reduce
pairs
improve
coatings.
Язык: Английский
MgAl Oxide Coatings Modified with CeO2 Particles Formed by Plasma Electrolytic Oxidation of AZ31 Magnesium Alloy: Photoluminescent and Photocatalytic Properties
Опубликована: Март 6, 2024
MgAl
oxide
coatings
containing
MgO
and
MgAl2O4
phases
were
doped
with
CeO2
particles
using
plasma
electrolytic
oxidation
(PEO)
of
AZ31
magnesium
alloy
in
5
g/L
NaAlO2
water
solution,
added
at
concentrations
up
to
8
g/L.
They
underwent
extensive
inve-stigation
into
their
morphology,
chemical
phase
compositions,
most
importantly,
photoluminescent
(PL)
properties
photocatalytic-activity
(PA)
photodegradation
methyl
orange
(10
cm3
mg/L).
The
concentration
the
aluminate
electrolyte
influences
amount
incorporated
coatings,
but
have
no
signi-ficant
effect
on
surface
thickness,
or
structure
coatings.
PL
emi-
ssion
spectrum
coating
is
divided
two
bands:
one
350-600
nm
range
related
structural
defects
MgO,
another
much
more
intense
600-775
attributed
F+
centres
MgAl2O4.
Incorporated
do
not
a
significant
intensity
band
red
spectral
region,
first
increases
particles.
PA
MgAl/CeO2
higher
than
that
pure
highest
was
observed
for
formed
electrolytes
addition
2
remained
chemically
physically
stable
across
multiple
cycles,
indicating
potential
applications.
Язык: Английский