Colorants,
Год журнала:
2025,
Номер
4(2), С. 17 - 17
Опубликована: Май 7, 2025
This
study
explores
the
photocatalytic
efficiency
of
Zn/Fe/TiO2
catalysts,
synthesized
via
wet
impregnation
method,
for
degrading
food
colorings
Allura
Red
and
Tartrazine
Yellow.
A
22
factorial
design
with
a
central
point
replication
guided
catalyst
synthesis.
Characterization
involved
BET
surface
area
analysis,
SEM-EDX,
XRD,
PZC
determination.
Photocatalytic
tests
were
conducted
in
batch
mode
under
natural
sunlight
10
mg
L−1
coloring
solutions.
Kinetic
modeling
statistical
analysis
performed,
reuse
was
evaluated
artificial
light.
Results
showed
that
low
calcination
temperatures
(200–273
°C)
Zn
loadings
2–10%
led
to
nearly
99%
discoloration
degradation
efficiency.
The
Behnajady–Modirshahla–Ghanbery
kinetic
model
best
described
data,
confirming
significant
impact
both
variables.
optimal
2%Zn/2%Fe/TiO2
calcined
at
200
°C,
while
Yellow,
6%Zn/2%Fe/TiO2
300
°C
most
effective.
Both
catalysts
exhibited
excellent
stability,
maintaining
over
four
cycles.
These
findings
demonstrate
potential
sustainable
wastewater
treatment.
Abstract
Water
scarcity
is
a
pressing
issue
in
developing
nations,
where
clean
water
crucial
for
various
purposes,
such
as
domestic
use,
agriculture,
industrial
processes,
and
energy
generation.
Contaminants
pristine
compromise
its
quality,
making
it
unfit
human
consumption.
We
need
sustainable
environmentally
conscious
remediation
techniques
to
combat
pollution.
Photocatalysis
promising
method
that
both
economically
viable,
demonstrating
remarkable
efficiency.
This
advanced
oxidation
has
significant
potential
wastewater
treatment,
the
rapid
advancement
field,
especially
development
of
innovative
photocatalysts,
made
leading
edge
treatment
solutions.
By
adopting
photocatalysis,
we
can
mitigate
negative
effects
pollution
ensure
future
our
planet.
review
explores
photocatalysis's
use
focusing
on
eco‐friendly
photocatalyst
synthesis,
contaminants
removal
advancements,
challenges
arise
when
research
meets
practice,
reactor
design,
strategies
improving
results.
The
author
eventually
presents
ideas
reaches
conclusions.
insights
researchers
leverage
develop
high‐efficiency,
low‐cost,
photocatalysis
aimed
at
enhancing
processes.
Research Square (Research Square),
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 29, 2025
Abstract
Nickel
oxide
(NiO)
has
gained
attention
as
a
promising
photocatalyst,
thanks
to
its
high
efficiency,
photochemical
stability,
cost-effectiveness,
and
eco-friendly
nature.
However,
wide
band
gap
rapid
electron-hole
recombination
hinder
practical
application
under
visible
light.
This
study
synthesized
pure
NiO
nanoparticles
(NiO-NPs)
sulfur/nitrogen
co-doped
(S/N-NiO-NPs)
via
the
co-precipitation
method.
Comprehensive
structural
optical
analyses
using
UV-Vis,
FT-IR,
XRD,
SEM
confirmed
successful
formation
of
desired
materials.
Notably,
doping
with
4%
sulfur
6%
nitrogen
significantly
enhanced
charge
separation,
extended
light
absorption,
narrowed
from
3.75
eV
2.50
eV,
reduced
crystalline
size
20.49
nm
17.89
nm.
Under
optimal
conditions
(pH
10),40
mg
S/N-NiO-NPs
achieved
an
impressive
98.9%
degradation
5
ppm
methylene
blue
dye
within
just
60
min
sunlight
irradiation,
far
outperforming
NiO-NPs.
Additionally,
antibacterial
evaluations
demonstrated
superior
efficacy,
exhibiting
inhibition
zones
of13–17
mm
against
pathogens
such
Bacillus
cereus,
Escherichia
coli,
Salmonella
typhi,
Staphylococcus
aureus,
compared
5–10
observed
for
These
results
highlight
remarkable
potential
S/N
co-doping
in
transforming
into
highly
efficient,
multifunctional
material
environmental
remediation
biomedical
applications.
Colorants,
Год журнала:
2025,
Номер
4(2), С. 17 - 17
Опубликована: Май 7, 2025
This
study
explores
the
photocatalytic
efficiency
of
Zn/Fe/TiO2
catalysts,
synthesized
via
wet
impregnation
method,
for
degrading
food
colorings
Allura
Red
and
Tartrazine
Yellow.
A
22
factorial
design
with
a
central
point
replication
guided
catalyst
synthesis.
Characterization
involved
BET
surface
area
analysis,
SEM-EDX,
XRD,
PZC
determination.
Photocatalytic
tests
were
conducted
in
batch
mode
under
natural
sunlight
10
mg
L−1
coloring
solutions.
Kinetic
modeling
statistical
analysis
performed,
reuse
was
evaluated
artificial
light.
Results
showed
that
low
calcination
temperatures
(200–273
°C)
Zn
loadings
2–10%
led
to
nearly
99%
discoloration
degradation
efficiency.
The
Behnajady–Modirshahla–Ghanbery
kinetic
model
best
described
data,
confirming
significant
impact
both
variables.
optimal
2%Zn/2%Fe/TiO2
calcined
at
200
°C,
while
Yellow,
6%Zn/2%Fe/TiO2
300
°C
most
effective.
Both
catalysts
exhibited
excellent
stability,
maintaining
over
four
cycles.
These
findings
demonstrate
potential
sustainable
wastewater
treatment.
