Battery-type
faradaic
materials
are
considered
a
class
of
promising
electrodes
for
capacitive
deionization
(CDI)
due
to
their
superior
ability
store
ions
through
redox
reactions.
However,
the
desalination
potential
such
electrode
has
not
been
fully
explored
subject
accessibility,
conductivity,
stability,
etc.
Herein,
embedded
battery
material
Ag
nanoparticles
is
designed
in
capsule-structural
units
composed
graphene
and
constructed
freestanding
composite
CDI.
Particularly,
these
confined
interconnected
capsules
can
be
both
efficiently
accessed
by
electrolyte
rationally
protected
capsule
networks,
significantly
unlocking
as
materials.
Impressively,
optimized
Ag-involved
anodes
achieve
an
ultrahigh
NaCl
capacity
≈360
mg
g
Abstract
Silver
(Ag)
is
deemed
a
promising
anode
material
for
capacitive
deionization
(CDI)
due
to
its
high
theoretical
capacity
and
efficient
selectivity
Cl
−
.
However,
the
strong
volume
change
during
conversion
reaction
significantly
undermines
cycling
performance
of
Ag
electrode.
Additionally,
achieving
well‐dispersed
in
active
matrix
challenging,
as
electrodes
prepared
by
conventional
thermal
reduction
tend
agglomerate.
Herein,
organic
linker
confinement
strategy
proposed,
applying
metal–organic
framework
(MOF)
chemistry
between
nodes
ligands
construct
Ag‐based
MOF.
The
uniform
dispersion
at
molecular
level,
confined
matrix,
efficiently
enhances
utilization
sites,
strengthens
interfacial
stability
Ag.
Consequently,
Ag‐MOF
CDI
exhibits
an
excellent
removal
121.52
mg
g
−1
20
mA
500
L
NaCl
solution,
rate
60.54%.
After
100
cycles,
retention
96.93%
achieved.
Furthermore,
capture
mechanism
elucidated
through
density
functional
theory
(DFT)
calculations,
ex
situ
XRD,
Raman
XPS.
This
ingenious
electrode
design
can
offer
valuable
insights
development
high‐performance
applications.
Analytical Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 14, 2025
Detecting
and
quantifying
mycotoxins
using
LFIA
are
challenging
due
to
the
need
for
high
sensitivity
accuracy.
To
address
this,
a
dual-mode
colorimetric-SERS
was
developed
detecting
deoxynivalenol
(DON).
Rhodium
nanocores
provided
strong
plasmonic
properties
as
SERS
substrate,
while
silver
nanoparticles
created
electromagnetic
"hotspots"
enhance
signal
sensitivity.
Finite
element
modeling
optimized
field
intensity,
Prussian
blue
generated
distinct
at
2156
cm-1,
effectively
reducing
background
interference.
This
achieved
detection
limit
of
4.21
pg/mL,
37
times
lower
than
that
colloidal
gold-based
(0.156
ng/mL).
Machine
learning
algorithms,
including
ANN
KNN,
enabled
precise
classification
quantification
contamination,
achieving
98.8%
accuracy
an
MSE
0.57.
These
results
underscore
platform's
potential
analyzing
harmful
substances
in
complex
matrices
demonstrate
important
role
machine
learning-enhanced
nanosensors
advancing
technologies.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 5, 2024
Abstract
Unraveling
the
fundamental
mechanisms
of
sodium
ion
adsorption
behavior
is
crucial
for
guiding
design
electrode
materials
and
enhancing
performance
capacitive
deionization
systems.
Herein,
optimization
systematically
investigated
through
robust
d–d
orbital
interactions
within
zinc‐doped
iron
carbide,
facilitated
by
a
novel
liquid
nitrogen
quenching
treatment.
Liquid
treatment
can
enhance
coordination
number,
strengthen
interactions,
promote
electron
transfer,
shift
d‐band
center
Fe
closer
to
Fermi
level,
thereby
ions
energy.
Consequently,
obtained
material
achieves
superior
gravimetric
capacity
121.1
mg
g
−1
attractive
cyclic
durability.
The
highly
competitive
compared
vast
majority
related
research
works
in
field
deionization.
Furthermore,
adsorption/desorption
are
substantiated
ex
situ
techniques,
revealing
dynamic
atomic
electronic
structure
evolutions
under
operational
conditions.
This
work
demonstrates
that
optimizing
via
modulation
enabled
an
effective
approach
developing
efficient
materials.
