RSC Advances,
Journal Year:
2023,
Volume and Issue:
13(8), P. 5337 - 5352
Published: Jan. 1, 2023
The
increased
discharge
of
water
pollutants
drives
the
development
new
and
effective
wastewater
remediation
methods.
Herein,
a
magnetic
nanocomposite
chitosan-graphene
oxide
(GO)
decorated
with
copper
ferrite
(MCSGO)
was
synthesized
under
ultrasound
agitation
applied
to
removal
Safranin
O
(SAF)
indigo
carmine
(IC)
dyes
from
wastewater.
structural,
magnetic,
physicochemical
features
as-prepared
MCSGO
have
been
thoroughly
investigated
using
various
characterization
techniques.
operational
parameters
such
as
mass,
contact
time,
pH,
initial
dye
concentration
were
investigated.
effects
diverse
coexisting
species
on
both
elimination
processes
examined.
experimental
results
demonstrated
that
adsorption
capacity
for
IC
SAF
112.6
66.15
mg
g-1,
respectively.
Five
different
isotherms
two-parameter
(Langmuir,
Tekman,
Freundlich)
three-parameter
(Sips,
Redlich-Peterson)
models.
Thermodynamic
studies
revealed
endothermic
spontaneous,
anionic
cationic
molecules
randomly
arranged
onto
adsorbent
nanoparticles.
Moreover,
mechanism
deduced.
Furthermore,
even
after
five
cycles
desorption,
showed
no
significant
loss
in
efficiency,
indicating
it
has
superior
stability
recycling
potential.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Feb. 14, 2024
Abstract
This
work
is
an
attempt
to
develop
flexible
radiation
shielding
based
on
a
blend
of
polymethyl
methacrylate
(PMMA)/polyvinyl
acetate
(PVAc)
and
LaFeO
3
nanoparticles
(NPs).
/PMMA/PVAc
were
made
using
simple
chemical
techniques.
A
high-resolution
transmission
electron
microscope
(HR-TEM)
X-ray
diffraction
(XRD)
showed
that
well-crystallized
NPs
with
particles
79
nm
in
size
orthorhombic
shape
obtained.
In
addition,
XRD
confirmed
the
existence
PMMA,
PVAc,
nanocomposite
films.
Fourier
transform
infrared
(FTIR)
reactive
functional
groups
interacted
each
other.
Field
emission-scan
(FE-SEM)
analysis
PMMA
PVAc
form
homogenous
spread
out
inside
surface.
The
samples
transmittance
range
30–74%
small
extinction
coefficient
(≤
0.08).
exhibited
dual-band
gap
structure,
direct
(indirect)
band
shrank
from
5.1
4.7
eV
(4.9
4.4
eV).
thermal
analyses
are
thermally
stable
up
260
°C.
Phy-X/PSD
software
was
used
figure
theoretical
gamma-ray
attenuation
parameters,
such
as
mass
coefficient,
mean
free
path,
half-value
layer,
for
different
PMMA/PVAc
+
x%
composites.
It
demonstrated
10
wt%
sample
exhibits
much
better
effectiveness
than
PMMA/PVAc,
hence
it
suitable
protecting
against
radiation.
Materials,
Journal Year:
2024,
Volume and Issue:
17(2), P. 527 - 527
Published: Jan. 22, 2024
Hydrosphere
pollution
by
organic
pollutants
of
different
nature
(persistent
dyes,
phenols,
herbicides,
antibiotics,
etc.)
is
one
the
urgent
ecological
problems
facing
humankind
these
days.
The
task
water
purification
from
such
can
be
effectively
solved
with
help
modern
photocatalytic
technologies.
This
article
devoted
to
study
properties
composite
catalysts
based
on
ZnO
modified
plasmonic
Ag
nanoparticles.
All
materials
were
obtained
laser
synthesis
in
liquid
and
differed
their
silver
content
preparation
conditions,
as
additional
irradiation
and/or
annealing
produced
powders.
prepared
ZnO-Ag
powders
investigated
electron
microscopy,
X-ray
diffraction
UV-Vis
spectroscopy.
Photocatalytic
tests
carried
out
well-
known
test
molecules
dye
rhodamine
B,
phenol
common
antibiotic
tetracycline)
using
LED
light
sources
wavelengths
375
410
nm.
introduction
small
concentrations
(up
1%)
nanoparticles
shown
increase
efficiency
photocatalyst
expanding
its
spectral
range.
Both
conditions
material
composition
optimized
obtain
photocatalysts
highest
efficiency.
Finally,
operation
mechanisms
distribution
are
discussed.
