It
is
an
effective
strategy
that
constructing
composites
with
a
multi-dimensional
structure
synergistically
enhances
the
electromagnetic
(EM)
wave
absorbing
performance.
Herein,
high-efficiency
EM
absorber
of
Mo2C/C
nanoclusters
uniformly
and
tightly
encapsulated
in
rGO
nanosheets
(Mo2C/C-rGO)
was
prepared
by
combination
freeze-casting
subsequently
carbothermal
reaction
method.
were
situ
induced
from
spherical
phosphomolybdic
acid/polypyrrole
(PMo12/PPy)
to
result
unique
cluster-like
microstructure.
Abundant
heterogeneous
interfaces
Mo2C/C-rGO
endowed
excellent
absorption
performance
at
low
filling
ratio
5
wt%.
The
minimum
reflection
loss
(RL)
value
-49.3
dB
1.38
mm
maximum
bandwidth
(EAB,
RL<-10
dB)
5.12
GHz
1.60
mm.
owing
attached
on
lamellar
multi-heterogeneous
interfaces,
resulting
enhanced
conduction
interfacial
polarization,
lengthening
transmission
path
incident
wave.
This
universal
would
be
extended
other
absorbers
multi-interface
structures
for
lightweight
broadband
Small Methods,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 28, 2024
Abstract
MXenes
are
2D
materials
known
for
their
unique
electromagnetic
wave
absorption
(EMWA)
properties
arising
from
varied
composition
and
structure.
In
this
study,
a
one‐step
ice‐assisted
process
is
utilized
to
directly
transform
MXene
into
3D
single‐layer
aerogels
(SMAs).
Furthermore,
the
interlayer
spacing
of
SMAs
optimized
by
incorporating
helical
carbon
nanotubes
(HCNTs).
Because
van
der
Waals
interaction
between
nanosheets
HCNTs,
assembled
HCNT@MXene
(HMAs)
exhibited
regular
porous
structure
moderate
conductivity,
leading
significantly
enhanced
responses,
as
demonstrated
finite
element
simulation.
The
HMAs
showed
an
exceptional
EMWA,
with
minimum
reflection
loss
−51.45
dB
effective
bandwidth
6.48
GHz
at
3.0
wt.%
filler
ratio.
Additionally,
visualization
surface
charge
distribution
power
density
characteristics
clarified
underlying
EMWA
mechanisms.
By
employing
hollow
gradient
metamaterial
design,
further
expanded
13.98
GHz.
maximum
radar
cross‐section
reduction
values
27.08
m
2
.
Moreover,
excellent
thermal
insulation
capability.
This
paper
presents
straightforward
yet
method
fabricating
offers
valuable
insights
development
application
MXene‐aerogel‐based
EMW
absorbers.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 21, 2025
Aerogels
with
porous
structures
offer
an
attractive
approach
to
modulating
electromagnetic
parameters
and
enhancing
wave
(EMW)
absorption
performance.
However,
conventional
aerogels
are
limited
by
their
single-scale
pore
size
fixed
orientation,
which
constrain
EMW
capabilities.
This
study
introduces
dual-scale
pores
dual-network
structure
constructed
via
constant-temperature
freezing
secondary-infusion
method.
Multiscale
both
micrometer-
submillimeter-scale
when
the
Ti3C2Tx
MXene
thermoplastic
polyurethane
solution
is
frozen
dried
at
a
specific
temperature,
leading
ultra-wide
effective
bandwidth
(EAB)
reaching
10.41
GHz
in
vertical
direction.
Furthermore,
address
poor
parallel
direction,
secondary
infusion
method
applied
form
aerogel
structure,
forms
reflective
interfaces
perpendicular
incident
various
directions.
adjustment
enhances
EAB
direction
from
1.58
5.93
GHz,
marking
275.32%
enhancement,
while
reaches
8.08
GHz.
design
strategy
overcomes
limitations
of
structural
scale
arrangement
enriching
attenuation
mechanisms
absorber,
effectively
reducing
sensitivity
incoming
EMW,
offering
new
insights
for
designing
efficient
absorbers.
Small Methods,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 28, 2025
Abstract
With
the
advent
of
5G
era,
there
has
been
a
marked
increase
in
research
interest
concerning
electromagnetic
wave‐absorbing
materials.
A
critical
challenge
remains
improving
properties
these
materials
while
satisfying
diverse
application
demands.
MXenes,
identified
as
prominent
“emerging”
2D
for
wave
absorption,
offer
unique
advantages
that
are
expected
to
drive
advancements
and
innovations
this
field.
This
review
emphasizes
synthesis
benefits
provided
by
structural
characteristics
MXenes
performance
enhancements
achieved
through
their
combination
with
other
absorbing
Material
requirements,
approaches,
conceptual
frameworks
integrated
underscore
advantages.
The
study
provides
thorough
analysis
MXene‐absorbing
composites,
going
beyond
basic
classification
address
preparation
modification
processes
affecting
absorption
composites.
Attention
is
directed
techniques,
design
principles,
influence
on
composite
performance.
Additionally,
potential
applications
devices
summarized.
concludes
addressing
challenges
currently
confronting
MXene
outlining
developmental
trends,
aiming
guidance
subsequent
domain.
Small,
Journal Year:
2024,
Volume and Issue:
20(49)
Published: Oct. 18, 2024
Abstract
Developing
lightweight,
high‐performance
electromagnetic
wave
(EMW)
absorbing
materials
those
can
absorb
the
adverse
radiation
or
waves
are
of
great
significance.
Transition
metal
carbides
and/or
nitrides
(MXenes)
a
novel
type
2D
nanosheets
associated
with
large
aspect
ratio,
abundant
polar
functional
groups,
adjustable
conductivity,
and
remarkable
mechanical
properties.
This
contributes
to
high‐efficiency
assembly
MXene‐based
aerogels
possessing
ultra‐low
density,
specific
surface
area,
tunable
unique
3D
porous
microstructure,
which
is
beneficial
for
promoting
EMW
absorption.
Therefore,
absorption
have
attracted
widespread
attention.
review
provides
an
overview
research
progress
on
absorption,
focusing
recent
advances
in
component
structure
design
strategies,
summarizes
main
strategies
constructing
aerogels.
In
addition,
based
mechanisms
regulation
preparation
methods
properties
varieties
components
pore
structures
detailed
advance
understanding
relationships
composition‐structure‐performance.
Furthermore,
future
development
challenges
faced
by
summarized
prospected.
