Nanomaterials,
Journal Year:
2023,
Volume and Issue:
13(20), P. 2795 - 2795
Published: Oct. 20, 2023
Magnetite
nanoparticles
(Fe3O4
NPs)
are
among
the
most
investigated
nanomaterials,
being
recognized
for
their
biocompatibility,
versatility,
and
strong
magnetic
properties.
Given
that
applicability
depends
on
dimensions,
crystal
morphology,
surface
chemistry,
Fe3O4
NPs
must
be
synthesized
in
a
controlled,
simple,
reproducible
manner.
Since
conventional
methods
often
lack
tight
control
over
reaction
parameters
produce
materials
with
unreliable
characteristics,
increased
scientific
interest
has
been
directed
to
microfluidic
techniques.
In
this
context,
present
paper
describes
development
of
an
innovative
3D
platform
suitable
synthesizing
uniform
fine-tuned
On-chip
co-precipitation
was
performed,
followed
by
microwave-assisted
silanization.
The
obtained
were
characterized
from
compositional
microstructural
perspectives
X-ray
diffraction
(XRD)
transmission
electron
microscopy
(TEM).
Moreover,
supplementary
physicochemical
investigations,
such
as
Fourier
Transform
Infrared
Spectroscopy
(FT-IR),
Kaiser
Test,
Ultraviolet-Visible
(UV-Vis)
Spectrophotometry,
Dynamic
Light
Scattering
(DLS),
Thermogravimetry
Differential
Scanning
Calorimetry
(TG-DSC)
analyses,
demonstrated
successful
modification.
Considering
positive
results,
presented
synthesis
functionalization
method
represents
fast,
reliable,
effective
alternative
producing
tailored
nanoparticles.
Nano Futures,
Journal Year:
2022,
Volume and Issue:
6(4), P. 045003 - 045003
Published: Oct. 13, 2022
Abstract
Para
-nitroaniline
(PNA)
and
ortho
(ONA)
are
highly
toxic
contaminants
in
aqueous
solution
must
be
treated.
In
the
current
investigation,
novel
magnetic
nanocomposites
containing
copper
ferrite
(CuFe
2
O
4
)
gelatin-derived
carbon
quantum
dots
(CQDs)
were
successfully
synthesized.
The
prepared
nanocatalyst
was
characterized
by
scanning
electron
microscopy,
x-ray
diffraction,
transmission
Brunauer–Emmet–Teller
(BET),
Fourier
transform
infrared
ultraviolet–visible
techniques.
mesoporous
structure
of
CuFe
/CQD
nanocomposite
shown
using
BET/Barrett–Joyner–Halenda
technique.
catalytic
performance
during
reduction
PNA
ONA
assessed
an
medium
at
25
°C.
complete
/CQDs
occurred
13
s
35
s,
respectively.
pseudo-second-order
rate
constant
(
K
app
obtained
as
2.89
×
10
−1
9.3
−2
for
reducing
ONA,
Moreover,
easily
separated
from
reaction
recycled
up
to
six
consecutive
cycles
without
significant
loss
activity.
ChemistryOpen,
Journal Year:
2022,
Volume and Issue:
11(11)
Published: Nov. 1, 2022
The
primary
objective
of
this
research
is
to
investigate
the
reduction
4-nitroaniline
(4-NA)
and
2-nitroaniline
(2-NA)
using
synthesized
copper
ferrite
nanoparticles
(NPs)
via
facile
one-step
hydrothermal
method
as
a
heterogeneous
nano-catalyst.
Nitroanilines
were
reduced
in
presence
without
catalyst
with
constant
amount
(100
mg)
reducing
agent
sodium
borohydride
(NaBH
Journal of Composites Science,
Journal Year:
2024,
Volume and Issue:
8(10), P. 425 - 425
Published: Oct. 14, 2024
Magnetic
fluid
hyperthermia,
a
minimally
invasive
localized
therapy
that
uses
heat
generated
by
magnetic
nanoparticles
under
an
AC
field,
is
complementary
approach
for
cancer
treatment
excellent
due
to
its
advantages
of
being
noninvasive
and
addressing
only
the
affected
region.
Still,
use
as
stand-alone
hindered
simultaneous
requirement
nanoparticle
biocompatibility,
good
heating
efficiency,
physiological
safe
dose.
To
overcome
these
limits,
biocompatible
nanoparticles’
efficiency
must
be
optimized.
Iron
oxide
are
accepted
more
available.
Therefore,
in
this
work,
superparamagnetic
iron
were
synthesized
low-cost
coprecipitation
method
modified
with
starch
gum
increase
their
compatibility
living
tissues.
Two
different
reducing
agents,
sodium
hydroxide
(NaOH)
ammonium
(NH4OH),
used
compare
influence.
The
X-ray
diffraction
results
indicate
formation
single
magnetite/maghemite
phase
all
cases,
particle
size
distribution
depending
on
coating
agent.
Citric
acid
functionalized
water-based
ferrofluids
also
prepared
study
field
274
kHz
frequency
14
kAm−1
amplitude.
samples
NaOH
display
higher
specific
loss
power
(SLP)
compared
ones
NH4OH.
SLP
value
72
Wg−1
coated
combination
arabic,
corresponding
intrinsic
(ILP)
2.60
nWg−1,
indicates
they
potential
materials
hyperthermia
therapy.
Results in Chemistry,
Journal Year:
2023,
Volume and Issue:
6, P. 100999 - 100999
Published: June 13, 2023
This
study
investigates
the
green
synthesis
of
Fe3O4/Ag
composite
nanoparticles
using
Moringa
Oleifera
(MO)
extract
in
coprecipitation
process.
The
microstructure,
optical,
and
magnetic
properties
synthesized
are
examined
specific
absorption
rate
(SAR)
is
measured.
X-ray
pattern
results
reveal
that
addition
Ag
increases
crystallite
size
to
25.4–32.6
nm.
Fourier
transform
infrared
spectra
confirm
presence
nanoparticles.
Magnetic
measurements
show
samples
have
soft
ferromagnetic
at
room
temperature,
with
increased
coercivity
reduced
saturation
magnetization
after
addition.
bandgap
energy
determined
be
approximately
3.35
eV,
which
decreases
2.99
eV
SAR
value
a
calorimetric
method
varies
from
0.81
Wg−1
2.12
under
different
alternating
field
(AMF)
strengths.
magnetization,
frequency,
amplitude
AMF
all
influence
Overall,
indicate
Fe3O4
has
significant
impact
on
microstructural,
magnetic,
nanoparticles,
making
them
promising
candidate
for
use
as
hyperthermia
agent.
