Chemistry of Materials,
Год журнала:
2024,
Номер
36(4), С. 1998 - 2006
Опубликована: Фев. 6, 2024
MXenes
produced
by
Lewis
acid
molten
salt
(LAMS)
etching
of
MAX
phases
have
attracted
the
community's
attention
due
to
their
controllable
surface
chemistry.
However,
delamination
is
challenging
hydrophobicity
multilayer
MXene
and
strong
interactions
between
halogen-terminated
sheets.
The
current
method
involves
dangerous
chemicals
such
as
n-butyllithium
or
sodium
hydride,
making
scale-up
difficult
limiting
practical
application
this
class
MXenes.
In
work,
we
present
a
simple
efficient
for
from
LAMS
synthesis
while
maintaining
LiCl
anhydrous
polar
organic
solvents
are
used
delamination.
Films
delaminated
flexible
an
electrical
conductivity
8000
S/cm,
which
maintained
after
week
exposure
95%
humidity.
This
successful
delamination,
preservation
inherent
properties,
stability
under
high-humidity
conditions
dramatically
expand
range
chemistries
available
research
potential
applications.
Journal of Materiomics,
Год журнала:
2023,
Номер
9(6), С. 1196 - 1241
Опубликована: Сен. 27, 2023
MXenes,
a
class
of
two-dimensional
materials,
have
garnered
significant
attention
due
to
their
unique
properties
and
versatile
applications
in
various
fields.
This
review
provides
comprehensive
overview
MXene
synthesis
methods,
highlighting
distinctive
layered
structure
tunable
through
surface
functionalization.
The
focus
then
shifts
remarkable
role
supercapacitor
technology.
MXenes
exhibit
high
electrical
conductivity,
large
areas,
tailored
chemistry,
making
them
promising
candidates
for
energy
storage
supercapacitors.
paper
discusses
the
interplay
electric
double-layer
capacitance
pseudocapacitance
mechanisms
within
MXene-based
electrodes,
detailing
recent
research
efforts
aimed
at
optimizing
performance.
Through
combination
theoretical
insights
experimental
findings,
potential
revolutionize
technology
emerges,
offering
prospects
high-energy-density
long-lasting
solutions.
Additionally,
this
highlights
advances
supercapacitors,
including
novel
electrode
designs,
electrolyte
engineering,
hybrid
showcasing
dynamic
evolution
research.
aims
provide
thorough
understanding
MXenes'
synthesis,
properties,
pivotal
advancing
technology,
while
also
encompassing
latest
breakthroughs
rapidly
evolving
field.
Energy & Environmental Science,
Год журнала:
2023,
Номер
16(10), С. 4191 - 4250
Опубликована: Янв. 1, 2023
The
design
strategies
and
internal
mechanisms
of
MXene-based
materials
in
flexible
energy
storage
devices
are
comprehensively
introduced.
Besides,
the
current
trends,
limitations,
future
outlooks
proposed.
Chemistry of Materials,
Год журнала:
2023,
Номер
35(19), С. 8239 - 8247
Опубликована: Сен. 29, 2023
The
first
step
to
wider
adoption
of
two-dimensional
(2D)
materials
is
understanding
their
fundamental
properties
by
employing
characterization
methods,
among
which
Raman
spectroscopy
plays
a
unique
role,
being
fast
and
nondestructive
tool.
number,
frequencies,
intensities
the
modes
(or
bands)
in
spectrum
have
been
used
identify
2D
materials'
crystal
lattice,
bonding,
even
number
layers.
MXenes,
transition
metal
carbides,
nitrides,
carbonitrides,
span
diverse
chemistries
structures,
but
only
few
spectra
reported.
This
work
systematic
experimental
study
MXene
family.
We
explore
vibrational
provide
peak
assignments
for
ten
MXenes
with
varying
structures
(from
2
4
atomic
layers
metal)
compositions─Ti2CTx,
Nb2CTx,
Mo2CTx,
V2CTx,
Ti3C2Tx,
Mo2TiC2Tx,
Ti3CNTx,
Nb4C3Tx,
V4C3Tx,
Mo2Ti2C3Tx
(terminated
−F,
−OH,
═O)
based
on
results
previously
reported
computational
studies.
discuss
effects
layer
thickness,
surface
terminations,
MXene's
metallic
scattering.
Additionally,
we
employ
polarized
out-of-plane
vibrations
explain
higher
frequency
region
spectra.
Finally,
demonstrate
how
electrochemical
reactions
affect
molecular
scattering
through
change
terminations.
By
creating
library
most
frequently
open
door
use
fingerprinting
situ
studies
various
MXenes.
ACS Nano,
Год журнала:
2023,
Номер
17(17), С. 17158 - 17168
Опубликована: Авг. 31, 2023
MXenes
are
two-dimensional
(2D)
transition
metal
carbides,
nitrides,
and
carbonitrides
typically
synthesized
from
layered
MAX-phase
precursors.
With
over
50
experimentally
reported
a
near-infinite
number
of
possible
chemistries,
make
up
the
fastest-growing
family
2D
materials.
They
offer
wide
range
properties,
which
can
be
altered
by
their
chemistry
(M,
X)
layers
in
structure,
ranging
two
M2XTx
to
five
M5X4Tx.
Only
one
M5X4
MXene,
Mo4VC4,
has
been
reported.
Herein,
we
report
synthesis
characterization
M5AX4
mixed
MAX
phases,
Ti2.5Ta2.5AlC4
Ti2.675Nb2.325AlC4,
successful
topochemical
transformation
into
Ti2.5Ta2.5C4Tx
Ti2.675Nb2.325C4Tx
MXenes.
The
resulting
were
delaminated
single-layer
flakes,
analyzed
structurally,
characterized
for
thermal
optical
properties.
This
establishes
phases
corresponding
These
materials
produced
based
on
guidance
theoretical
predictions,
leading
more
exciting
applications
Advanced Materials,
Год журнала:
2024,
Номер
36(27)
Опубликована: Апрель 23, 2024
Wireless
and
wearable
sensors
attract
considerable
interest
in
personalized
healthcare
by
providing
a
unique
approach
for
remote,
noncontact,
continuous
monitoring
of
various
health-related
signals
without
interference
with
daily
life.
Recent
advances
wireless
technologies
have
promoted
practical
applications
due
to
their
significantly
improved
characteristics,
such
as
reduction
size
thickness,
enhancement
flexibility
stretchability,
conformability
the
human
body.
Currently,
most
researches
focus
on
active
materials
structural
designs
sensors,
just
few
exceptions
reflecting
data
transmission.
This
review
provides
comprehensive
overview
state-of-the-art
related
studies
empowering
sensors.
The
emerging
functional
nanomaterials
utilized
designing
modules
are
highlighted,
which
include
metals,
carbons,
MXenes.
Additionally,
outlines
system-level
integration
flexible
spanning
from
novel
design
strategies
enhanced
efficient
transmitting
wirelessly.
Furthermore,
introduces
representative
remote
noninvasive
physiological
through
on-skin
implantable
sensing
systems.
Finally,
challenges,
perspectives,
unprecedented
opportunities
discussed.
