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.
Gels,
Год журнала:
2024,
Номер
10(3), С. 211 - 211
Опубликована: Март 21, 2024
Water
is
one
of
the
fundamental
resources
for
existence
humans
and
environment.
Throughout
time,
due
to
urbanization,
expanding
population,
increased
agricultural
production,
intense
industrialization,
significant
pollution
with
persistent
contaminants
has
been
noted,
placing
water
quality
in
danger.
As
a
consequence,
different
procedures
various
technologies
have
tested
used
order
ensure
that
sources
are
safe
use.
The
adsorption
process
often
considered
wastewater
treatment
its
straightforward
design,
low
investment
cost,
availability,
avoidance
additional
chemicals,
lack
undesirable
byproducts,
demonstrated
efficacious
potential
treating
eliminating
organic
contaminants.
To
accomplish
application,
need
develop
innovative
materials
become
an
essential
goal.
In
this
context,
overview
recent
advances
hydrogels
based
on
chitosan
nanocomposites
their
application
depollution
contaminated
dyes
reported
herein.
present
review
focuses
(i)
challenges
raised
by
synthesis
characterization
hydrogels;
(ii)
discussion
impact
main
parameters
affecting
process;
(iii)
understanding
isotherms,
kinetics,
thermodynamic
behavior;
(iv)
examination
possibility
recycling
reusing
hydrogels.
Chemistry of Materials,
Год журнала:
2024,
Номер
36(9), С. 3981 - 3998
Опубликована: Апрель 24, 2024
Spinel
oxide
nanocrystals
are
attractive
materials
for
photoinduced
advanced
oxidation
processes
that
degrade
organic
pollutants
in
water
due
to
their
chemical
stability
and
tunability,
visible
light
absorption,
magnetic
recoverability.
However,
a
systematic
understanding
of
the
structural
factors
control
reactivity
specific
spinel
nanocrystal
toward
degradation
is
lacking.
This
Perspective
illustrates
these
knowledge
gaps
through
an
investigation
into
impacts
surface
chemistry
composition
ferrite
formula
MFe
Abstract
Pentachlorophenol
is
a
pesticide
widely
known
for
its
harmful
effects
on
sewage,
causing
harm
to
the
environment.
In
previous
studies,
our
group
identified
adsorption
as
crucial
factor
in
catalytic
ozonation
processes,
and
subsequent
observations
revealed
catalyst’s
role
reducing
toxicity
during
degradation.
this
research,
we
quantified
organochlorine
intermediates
low
molecular
weight
organic
acids
generated
under
optimal
pH
conditions
(pH
9),
with
without
catalyst.
Additionally,
assessed
reactivity
of
these
through
theoretical
calculations.
Our
findings
indicate
that
catalyst
reduces
duration
intermediates.
presence
CO
2
suggests
enhanced
mineralization
pentachlorophenol,
process
notably
facilitated
by
Theoretical
calculations,
such
Fukui
analysis,
offer
insights
into
potential
pathways
dechlorination
aromatic
molecules
radicals
like
OH,
indicating
significance
pathway.
International Journal of Photoenergy,
Год журнала:
2025,
Номер
2025(1)
Опубликована: Янв. 1, 2025
The
large
surface
area
for
pollutant
adsorption
and
low
charge
recombination
exhibited
by
carbon‐based
nanocomposites
enhances
the
performance
efficiency
of
photocatalysts.
Herein,
ZnO/GO
ZnO/g‐C
3
N
4
in
photocatalytic
degradation
acetaminophen
under
UV
irradiation
was
compared.
were
synthesized
a
facile
sol–gel
method.
structural,
morphological,
optical
properties
studied
using
XRD,
SEM,
TEM,
FTIR,
BET,
UV‐Vis,
PL
characterization
techniques.
An
increase
observed
with
introduction
GO
g‐C
.
possessed
greater
than
nanocomposites.
efficiencies
obtained
84.6%
61.2%
best
nanocomposites,
respectively,
1
μ
g/mL
at
pH
7,
hence
their
great
potential
environmental
remediation
applications.
