ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(13), P. 11888 - 11901
Published: June 28, 2023
Highly
flexible,
bendable,
stretchable,
and
ultralightweight
microwave
absorbers
(MA)
that
can
handle
harsh
environments
are
essential
for
conformal
surface
coating
in
aerospace
defence
industries.
Hence,
crystalline
carbon
nanotubes
(CNTs)
grown
on
fibers
(CFs)
using
the
chemical
vapour
deposition
technique
(CVD)
embedded
polyurethane
(PU)
to
obtain
MA.
The
fabricated
MA
is
highly
stretchable
(>400%),
has
a
low
percolation
threshold
(0.1
wt
%),
(0.35
thin
nanocomposite
enhanced
absorber
performance.
thickness
of
optimized
achieve
impedance
matching
condition
by
utilizing
CST
studio
simulation
verified
experimentally.
minimum
reflection
loss
(RL)
−52.53
dB
with
effective
bandwidth
(EAB)
covering
complete
X
band
at
2.4
mm
obtained
just
0.35
%
CFCNT.
negligible
change
RL
EAB
after
1000
bending
cycles
2
h
water-bath
sonication
confirms
operating
efficiency
environmental
conditions.
mechanism
absorption
case
CF
CFCNT-based
elucidated
concerning
properties,
electrical
conductivity,
morphology.
also
extended
from
Ku
(12.4–18
GHz)
broadband
application.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(27), P. 12667 - 12680
Published: June 25, 2024
Several
measures,
including
crude
oil
recovery
improvement
and
carbon
dioxide
(CO2)
conversion
into
valuable
chemicals,
have
been
considered
to
decrease
the
greenhouse
effect
ensure
a
sustainable
low-carbon
future.
The
Knoevenagel
condensation
CO2
fixation
introduced
as
two
principal
solutions
these
challenges.
In
present
study
for
first
time,
bio-metal–organic
frameworks
(MOF)(Cu)/graphene
oxide
(GO)
nanocomposites
used
catalytic
agents
reactions.
view
of
attendance
amine
groups,
biological
MOFs
with
NH2
functional
groups
Lewis
base
sites
protruding
on
channels'
internal
surface
were
used.
bio-MOF(Cu)/20%GO
performs
efficaciously
in
fixation,
leading
more
than
99.9%
TON
=
525
via
solvent-free
reaction
under
1
bar
atmosphere.
It
has
shown
that
are
highly
due
basic
sites,
i.e.,
NH2,
pyrimidine,
C═O
groups.
Besides,
active
exert
synergistic
effects
render
bio-MOF(Cu)/10%GO
nanostructures
efficient
catalysts,
significantly
accelerating
reactions
aldehydes
malononitrile
substrates,
thanks
high
TOF
(1327
h–1)
acceptable
reusability.
Bio-MOFs
can
be
stabilized
using
GO
oxygen-containing
contribute
substitutes,
an
expeditious
speed
facilitating
substrate
absorption.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(6), P. 7415 - 7429
Published: Feb. 2, 2024
The
synthesis
of
materials
with
a
multicomponent
hierarchical
structure
is
an
essential
strategy
for
achieving
high-performance
electromagnetic
wave
(EMW)
absorption.
However,
conventional
design
strategies
face
challenges
in
terms
the
rational
construction
specific
architecture.
In
this
study,
we
employ
combined
space-restricted
and
to
surface-plant
MoS2
nanosheets
on
yolk–shell
structural
carbon-modified
Co-based
composites,
leading
development
Co/NC@void@C@MoS2
absorbers
advanced
surface-planted
nanosheets,
Co/NC
magnetic
yolk,
dielectric
carbon
shell
work
together
enhance
impedance
matching
characteristics
synergistic
loss
capabilities
composites.
Experimental
results
indicate
that
Co/NC@void@C-700@MoS2
exhibited
best
absorption
performance
effective
bandwidth
7.54
GHz
(at
2.05
mm)
minimum
reflection
−60.88
dB
1.85
mm).
Furthermore,
radar
cross-section
simulation
demonstrate
effectively
suppresses
scattering
transmission
EMWs
perfect
electric
conductor
substrates,
implying
its
superior
practical
application
value.
This
study
provides
inspiration
experimental
basis
designing
optimizing
EMW
ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(27), P. 32803 - 32813
Published: June 27, 2023
Heterostructure
engineering
has
emerged
as
a
promising
approach
for
creating
high-performance
microwave
absorption
materials
in
various
applications
such
advanced
communications,
portable
devices,
and
military
fields.
However,
achieving
strong
electromagnetic
wave
attenuation,
good
impedance
matching,
low
density
single
heterostructure
remains
significant
challenge.
Herein,
unique
structural
design
strategy
that
employs
hollow
structure
coupled
with
gradient
hierarchical
heterostructures
to
achieve
is
proposed.
MoS2
nanosheets
are
uniformly
grown
onto
the
double-layered
Ti3C2Tx
MXene@rGO
microspheres
through
self-assembly
sacrificial
template
techniques.
Notably,
heterostructures,
comprising
matching
layer,
reduced
graphene
oxide
(rGO)
lossy
MXene
reflective
have
demonstrated
improvements
attenuation
capabilities.
Additionally,
incorporation
of
can
further
improve
while
reducing
overall
composite
density.
The
distinctive
enable
Ti3C2Tx@rGO@MoS2
exceptional
properties.
reflection
loss
value
reaches
-54.2
dB
at
thin
thickness
1.8
mm,
effective
bandwidth
covers
whole
Ku-band,
up
6.04
GHz.
This
work
provides
an
exquisite
perspective
on
developing
next-generation
absorbers.
