Optimized size and stability of composite CuO–ZnO metal oxide nanoparticles for efficient removal of Reactive Black 5 dye
Journal of Chemical Technology & Biotechnology,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 16, 2025
Abstract
BACKGROUND
The
increasing
contamination
of
water
bodies
with
industrial
dyes
necessitates
efficient
remediation
strategies.
CuO–ZnO
composite
nanoparticles
(NPs)
have
shown
promise
as
adsorbents
due
to
their
high
surface
area,
stability,
and
tunable
properties.
This
study
focuses
on
optimizing
the
synthesis
conditions
CuO‐ZnO
NPs
via
a
co‐precipitation
method
evaluating
performance
for
removal
Reactive
Black
5
(RB5)
dye.
RESULTS
were
synthesized
varied
precursor
ratios,
pH
values,
temperatures,
reagent
addition
times
achieve
optimal
size
stability.
Characterization
using
ultraviolet–visible
spectroscopy,
fluorescence,
X‐ray
diffraction,
Fourier
transform
infrared
dynamic
light
scattering,
vibrating‐sample
magnetometry,
Brunauer–Emmett–Teller
analysis
confirmed
structural,
optical,
physical
properties
optimized
composite.
smallest
highest
stability
concentration
ratio
50:50
was
obtained
at
11,
80
°C,
time
min.
Composite
show
ferromagnetic
behavior.
adsorption
efficiency
RB5
dye
studied
under
different
operational
parameters,
revealing
that
maximum
(92%)
occurred
2
contact
60
Adsorption
kinetics
followed
pseudo‐first‐order
model,
while
equilibrium
data
aligned
Freundlich
isotherm,
indicating
multilayer
adsorption.
Thermodynamic
endothermic
spontaneous
nature
process.
CONCLUSION
demonstrated
maintained
significant
reusability
across
multiple
adsorption–desorption
cycles.
These
findings
highlight
potential
an
effective
sustainable
adsorbent
wastewater
treatment.
©
2025
Society
Chemical
Industry
(SCI).
Язык: Английский
Antibacterial performance of Co–Zn ferrite nanoparticles under visible light irradiation
Journal of Chemical Technology & Biotechnology,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 20, 2024
Abstract
BACKGROUND
To
address
water
scarcity
and
promote
sustainable
resource
management,
more
efficient
cost‐effective
treatment
solutions
are
necessary.
Particularly,
pathogens
in
drinking
a
topic
of
growing
concern.
One
promising
technology
is
the
use
photocatalytic
nanoparticles
activated
by
visible
light
as
antibacterial
agents.
This
study
focuses
on
characterization
properties
Co–Zn
ferrite
nanocatalysts,
tested
against
Escherichia
coli
.
RESULTS
The
Co
x
Zn
1−
Fe
2
O
4
(
=
0,
0.1,
0.4
0.6)
ferrites
were
synthesized
co‐precipitation
method.
Structural,
morphological
optical
analyses
confirmed
that
these
have
cubic
spinel
structure,
with
sizes
around
10
nm,
band
gap
energies
suitable
for
activation
(1.4–1.7
eV).
efficacy
E.
was
compared
their
performance
employing
phenol
organic
pollutant
model
(highest
degradation
0.6).
Specifically,
capacity
evaluated
comparing
ability
bacteria
to
grow
after
being
incubated
under
dark.
It
found
lower
cobalt
content
0
0.1)
significantly
reduced
bacterial
culturability
light.
Transmission
Electron
Microscopy
analysis
revealed
caused
secrete
biofilm,
potentially
offering
some
protection
nanoparticles.
CONCLUSION
ZnFe
show
highest
effect
amongst
those
tested.
attributed
combined
action
2+
ion
release
Furthermore,
might
inhibit
protective
biofilm
secretion,
leading
higher
effects.
©
2024
Author(s).
Journal
Chemical
Technology
Biotechnology
published
John
Wiley
&
Sons
Ltd
behalf
Society
Industry
(SCI).
Язык: Английский