Coatings,
Journal Year:
2024,
Volume and Issue:
14(4), P. 439 - 439
Published: April 8, 2024
This
study
presents
a
detailed
investigation
into
the
use
of
β-cyclodextrin
(β-CD)
encapsulated
iron
oxide
nanoparticle
(β-CD@Fe3O4)
composites,
modified
with
different
ligands,
to
activate
peroxymonosulfate
(PMS)
for
degradation
pharmaceutical
contaminants,
namely,
diclofenac,
carbamazepine,
and
erythromycin.
The
focus
is
on
understanding
ligand
effect,
particularly
using
citric
acid
(CIT),
polyethyleneimine
(PEI),
cetyl
trimethyl
ammonium
bromide
(CTAB),
performance
these
composites.
Employing
density
functional
theory
(DFT)
calculations,
this
work
examines
electronic
structure
charge
distributions
β-CD@Fe3O4
providing
insights
their
interaction
various
pollutants.
reveals
that
β-CD@PEI@Fe3O4
composite
demonstrates
superior
efficiency
due
optimal
electrostatic
interactions,
regardless
pollutant’s
hydrophobicity.
On
other
hand,
β-CD@CIT@Fe3O4
shows
moderate
efficiency,
β-CD@CTAB@Fe3O4
exhibits
selective
hydrophobic
compounds.
These
findings
underscore
significant
role
surface
chemistry
in
modulating
activation
PMS
opening
avenues
designing
tailored
β-CD
composites
environmental
remediation.
RSC Advances,
Journal Year:
2024,
Volume and Issue:
14(5), P. 2862 - 2872
Published: Jan. 1, 2024
Based
on
the
excellent
adsorption
properties
of
carbon
materials,
a
new
magnetic
nanodemulsifier
was
prepared
in
this
study.
First,
nanotubes
were
oxidized
using
solvothermal
method.
Then,
Fe3O4
combined
with
one-pot
method,
and
then
grafted
onto
fluorine-containing
polyether
to
prepare
composite
demulsifier
(Fe3O4@C-F)
good
demulsification
properties.
The
surface
morphology
analyzed
scanning
electron
microscopy
(SEM).
structure
characterized
Fourier
transform
infrared
(FTIR)
spectroscopy
X-ray
photoelectron
spectrometry
(XPS).
stability
thermogravimetric
analysis
(TGA).
Results
showed
that
fluorinated
successfully
attached
Fe3O4.
experimental
objective
obtain
self-made
crude
oil
emulsion.
test
recovery
performance
performed,
main
factors
affecting
investigated.
when
dosage
800
mg
L-1,
temperature
65
°C,
time
90
min,
pH
value
6.
effect
Fe3O4@C-F
best,
whereby
rate
could
reach
91.68%,
oil-water
interface
clear.
had
response
be
recycled
from
two-phase
system
six
times
under
action
an
external
field.
is
efficient
environmentally
friendly
has
important
application
for
enriching
technology
systems.
