In
this
study,
magnetite
(Fe3O4)
material
from
natural
iron
sand
was
synthesized
and
afterward
enhanced
with
chitosan/silver
nanoparticles
(Fe3O4/CS/AgNPs)
to
serve
as
a
methylene
blue
(MB)
adsorbent.
Fe3O4/CS/AgNPs
composites
were
prepared
via
co-precipitation
method
confirmed
by
X-ray
diffraction
(XRD),
scanning
electron
microscopy
(SEM),
vibrating
sample
magnetometry
(VSM),
Fourier
transform
infrared
spectroscopy
(FTIR).
SEM
images
showed
that
the
composite
spherical
had
436
±
6.40
nm
diameter.
VSM
data
revealed
saturation
magnetization
value
of
adsorbent
21.36
emu/g
easily
separated
solution
using
an
external
magnet.
The
kinetics
adsorption
isotherms
MB
on
fit
well
pseudo
second-order
kinetic
model
Langmuir
isotherm
model.
maximum
capacity
for
82.58
mg/g
percent
removal
could
be
kept
at
70.4%
after
5
cycles
repetition.
Overall,
exhibits
promising
in
environments.
ACS Applied Nano Materials,
Год журнала:
2024,
Номер
7(2), С. 1674 - 1683
Опубликована: Янв. 10, 2024
Carbon
polymer
dots
(CPDs)
show
incredible
potential
due
to
their
outstanding
optical
characteristics,
simple
synthesis
using
low-cost
precursors,
and
diverse
applications.
This
study
aimed
develop
chromium-doped
CPDs
(Cr-CPDs)
an
efficient
one-step
microwave
method
for
fluorescence
sensing
optoelectronic
devices.
The
one-pot
used
citric
acid,
urea,
C6H9O6Cr,
N,N-dimethylformamide.
resulting
Cr-CPDs
demonstrated
excitation-dependent
photostability
with
a
high
quantum
yield
of
15.56%,
making
them
promising
fluorescence-based
Our
experiments
showed
that
the
Cr-CPDs'
could
be
effectively
quenched
in
presence
Fe3+
ions,
allowing
detection
down
0.52
μM
concentration.
By
combination
PVA,
flexible
composite
films
were
created
visual
ion
sensing.
Static
quenching
IFE
dynamics
work
synergistically
underpin
selective
sensitive
fluorescent
function
Fe3+.
These
further
served
as
colorful
inks
multifunctional
information
encoding.
Most
significantly,
incorporating
into
PVA
assembling
on
light-emitting
devices
(LEDs)
led
blue-
green
LEDs.
opens
new
possibilities
cost-effective
luminescent
materials
next-gen
electronics.
Journal of Porous Materials,
Год журнала:
2024,
Номер
31(4), С. 1503 - 1517
Опубликована: Апрель 23, 2024
Abstract
This
study
was
performed
to
achieve
two
important
scientifically
challenging
goals,
environmental
remediation
of
toxic
heavy
metals
and
utilization
agricultural
lignocellulosic
wastes.
In
this
work,
a
series
mesoporous
magnetic
carbon
(MMC)
adsorbents
were
synthesized
by
carbothermic
reduction
at
different
temperatures
employing
date
palm
(Phoenix
dactylifera
L.)
stones
as
the
source.
The
characterized
technquies
results
confirmed
presence
zero-valent
iron
(ZVI)
nanoparticles
other
oxides
products
carbothermal
reduction.
nature
phases
present,
crystallite
size
surface
properties
found
be
dependent
on
calcination
temperature.
adsorbent
MMC700
exhibited
smallest
36
nm
largest
S
BET
341
m
2
/g.
All
showed
structure
with
mesopore
average
diameter
lower
than
6
nm.
performance
evaluated
in
removal
process
Cr(VI)
an
aqueous
medium,
optimum
conditions
reported.
dependant
solution
pH
where
best
achieved
=
2.
Complete
chromium
less
5
min
MMC700.
better
fitted
pseudo-second-order
kinetics
followed
Freundlich
model
isotherm.
maximum
adsorption
capacity
265.25
mg/g
for
MMC700,
suggesting
its
application
efficient,
low-cost,
easily
separable
process.
prepared
superior
compared
wastes
or
biomass
-
derived
reported
literature.
Separation Science and Technology,
Год журнала:
2024,
Номер
59(3), С. 449 - 463
Опубликована: Фев. 11, 2024
The
depression
of
pyrite
in
the
flotation
separation
molybdenum-sulfur
(Mo-S)
mixed
concentrate
has
become
a
significant
issue.
This
study
aimed
to
examine
process
separating
molybdenite
and
presence
sodium
humate
(NaHA).
results
micro-flotation
tests
indicated
that
NaHA
exhibited
capabilities
displayed
remarkable
selectivity
toward
both
molybdenite.
Real
ore
experiments
have
shown
adding
22.5
mg/L
pulp
Mo-S
at
pH
6.5,
indexes
achieved
46.01%
Mo
grade
90.11%
recovery.
It
is
noteworthy
dosage
was
significantly
lower
compared
505
utilized
mineral
processing
plant.
Contact
angle
measurements
revealed
effectively
increased
surface
hydrophilicity
pyrite.
Adsorption
amount
measurements,
zeta
potential
Fourier
infrared
spectroscopic
(FT-IR)
analysis
adsorption
capacity
on
higher
than
had
highly
selective
inhibitory
for
an
ideal
depressant.
Carbon
polymer
dots
(CPDs)
show
incredible
potential
due
to
their
outstanding
optical
characteristics,
simple
synthesis
using
low-cost
precursors,
and
diverse
applications.
This
study
aimed
develop
chromium-doped
CPDs
(Cr-CPDs)
an
efficient
one-step
microwave
method
for
fluorescence
sensing
optoelectronic
devices.
The
one-pot
used
citric
acid,
urea,
C6H9O6Cr,
N,
N-dimethylformamide.
resulting
Cr-CPDs
demonstrated
excitation
dependent
photostability
with
a
high
quantum
yield
of
15.56%,
making
them
promising
fluorescence-based
Our
experiments
showed
the
Cr-CPDs'
could
be
effectively
quenched
in
presence
Fe3+
ions,
allowing
detection
down
0.52
μM
concentration.
By
combining
PVA,
flexible
composite
films
were
created
visual
ion
sensing.
Static
quenching
IFE
dynamics
work
synergistically
underpin
selective
sensitive
fluorescent
function
Fe3+.These
further
served
as
colorful
inks
multifunctional
information
encoding.
Most
significantly,
incorporating
into
PVA
assembling
on
LEDs
led
blue
green
light-emitting
opens
new
possibilities
cost-effective
luminescent
materials
next-gen
electronics.
