Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(11), P. 10183 - 10202
Published: May 21, 2024
Vanadium
carbide
(V2C)
MXene,
a
transition
metal,
exhibits
significant
potential
as
an
innovative
cocatalyst
to
enhance
photocatalytic
efficiency.
In
this
study,
we
explored
the
construction
of
self-assembled
V2C@V2O5/TiO2
composite
through
sol–gel
method,
incorporating
in
situ
grown
vanadium
oxide
(V2O5)
with
TiO2.
Efficient
charge
carrier
separation
was
achieved
owing
higher
conductivity,
abundant
active
sites,
and
light
absorbance.
When
employed
methanol–water
mixture,
resulting
CO
CH4
production
reached
remarkable
amounts
20
075
17
567
μmol
g–1
h–1,
respectively.
This
represented
substantial
enhancement
efficiency
compared
using
water/H2
sacrificial
reagents
pure
TiO2
nanoparticles.
enhanced
photoactivity
presence
methanol
attributed
efficient
photoinduced
separation,
facilitated
by
synergistic
effect
V2C/V2O5
increased
proton
production.
Moreover,
performance
V2C
MXene-based
for
CO,
CH4,
H2
formation
1.45,
52.75,
1.35
times
higher,
respectively,
than
that
V2AlC
MAX-based
composite.
The
advantages
conductivity
its
two-dimensional
layered
structure
contributed
achieving
MAX
structure.
maximum
quantum
yield
9.7,
8.488,
0.352%
H2,
over
continuous
consecutive
cycles.
study
not
only
demonstrates
promising
prospects
MXenes
but
also
introduces
approach
designing
fabricating
highly
stable
systems
CO2
recycling,
applications
various
energy-related
fields.
ACS Nano,
Journal Year:
2022,
Volume and Issue:
16(9), P. 13370 - 13429
Published: Sept. 12, 2022
Photocatalytic
water
splitting,
CO2
reduction,
and
pollutant
degradation
have
emerged
as
promising
strategies
to
remedy
the
existing
environmental
energy
crises.
However,
grafting
of
expensive
less
abundant
noble-metal
cocatalysts
on
photocatalyst
materials
is
a
mandatory
practice
achieve
enhanced
photocatalytic
performance
owing
ability
extract
electrons
efficiently
from
enable
rapid/enhanced
catalytic
reaction.
Hence,
developing
highly
efficient,
inexpensive,
noble-metal-free
composed
earth-abundant
elements
considered
noteworthy
step
toward
considering
photocatalysis
more
economical
strategy.
Recently,
MXenes
(two-dimensional
(2D)
transition-metal
carbides,
nitrides,
carbonitrides)
shown
huge
potential
alternatives
for
cocatalysts.
several
excellent
properties,
including
atomically
thin
2D
morphology,
metallic
electrical
conductivity,
hydrophilic
surface,
high
specific
surface
area.
In
addition,
they
exhibit
Gibbs
free
intermediate
H
atom
adsorption
close
zero
than
that
commercial
Pt-based
cocatalyst,
Fermi
level
position
above
H2
generation
potential,
an
capture
activate
molecules.
Therefore,
there
growing
interest
in
MXene-based
various
events.
this
review,
we
focus
recent
advances
synthesis
with
0D
morphologies,
stability
MXenes,
photocatalysts
evolution,
degradation.
The
challenges
possible
future
directions
enhance
are
also
discussed.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(29)
Published: Feb. 23, 2022
Abstract
Sparked
by
natural
photosynthesis,
solar
photocatalysis
using
metal‐free
graphitic
carbon
nitride
(g‐C
3
N
4
)
with
appealing
electronic
structure
has
turned
up
as
the
most
captivating
technique
to
quest
for
sustainable
energy
generation
and
pollution‐free
environment.
Nonetheless,
low‐dimensional
g‐C
is
thwarted
from
sluggish
kinetics
rapid
recombination
of
photogenerated
carriers
upon
light
irradiation.
Among
multifarious
modification
strategies,
engineering
2D
cocatalysts
anticipated
accelerate
redox
kinetics,
augment
active
sites
ameliorate
electron–hole
separation
boosted
activity
thanks
its
face‐to‐face
contact
surface.
It
timely
technological
significance
review
2D/2D
interfaces
state‐of‐the‐art
cocatalysts,
spanning
carbon‐containing
phosphorus‐containing,
metal
dichalcogenide,
other
cocatalysts.
Fundamental
principles
each
photocatalytic
application
will
be
introduced.
Thereafter,
recent
advances
cocatalyst‐mediated
systems
critically
evaluated
based
on
their
interfacial
engineering,
emerging
roles,
impacts
toward
stability
catalytic
efficiency.
Importantly,
mechanistic
insights
into
charge
dynamics
structure–performance
relationship
deciphered.
Last,
noteworthy
research
directions
are
prospected
deliver
insightful
ideas
future
development
.
Overall,
this
serve
a
scaffold
cornerstone
in
designing
dimensionality‐dependent
cocatalyst‐assisted
renewable
ecologically
green
Nature Communications,
Journal Year:
2022,
Volume and Issue:
13(1)
Published: Sept. 22, 2022
Although
Ti3C2Tx
MXene
is
a
promising
material
for
many
applications
such
as
catalysis,
energy
storage,
electromagnetic
interference
shielding
due
to
its
metallic
conductivity
and
high
processability,
it's
poor
resistance
oxidation
at
temperatures
makes
application
under
harsh
environments
challenging.
Here,
we
report
an
air-stable
based
composite
with
extracted
bentonite
(EB)
nanosheets.
In
this
case,
oxygen
molecules
are
shown
be
preferentially
adsorbed
on
EB.
The
saturated
adsorption
of
EB
further
inhibits
more
the
surface
weakened
p-d
orbital
hybridization
between
O2
Ti3C2Tx,
which
induced
by
Ti3C2Tx/EB
interface
coupling.
As
result,
capable
tolerating
annealing
(above
400
°C
several
hours)
both
in
air
or
humid
environment,
indicating
highly
improved
antioxidation
properties
condition.
above
finding
independent
termination
ratio
obtained
through
different
synthesis
routes.
Utilized
terahertz
materials,
retains
ability
after
high-temperature
treatment
even
up
600
°C,
while
pristine
completely
oxidized
no
ability.
Joule
heating
thermal
cycling
performance
also
demonstrated.
Energy & Fuels,
Journal Year:
2021,
Volume and Issue:
35(13), P. 10374 - 10404
Published: June 15, 2021
Photocatalytic
CO2
reduction
to
produce
valuable
chemicals
and
fuels
using
solar
energy
provides
an
appealing
route
alleviate
global
environmental
problems.
However,
available
semiconductor
materials
are
less
efficient
promote
conversion
energy-efficient
fuels.
In
the
current
development,
titanium
carbide
(Ti3C2)
MXene
as
a
co-catalyst
with
high
conductivity,
abundant
active
sites,
large
specific
surface
area,
is
preeminent
candidate
photoactivity.
This
review
overview
in
utilization
of
Ti3C2
promising
for
maximizing
efficiency
product
selectivity.
mainstream,
developments
MXene-based
composites
through
different
processes,
such
water,
photocatalytic
methanation,
natural
gas
flaring
synthesis
gas,
have
been
discussed.
The
also
gives
factors
crucial
affect
properties
Ti3C2,
morphological,
electrical,
optical,
luminescence
characteristics.
fundamental
mechanism
Ti3C2Tx
strategies
improve
performance
described.
great
emphasis
given
on
situ
TiO2
production
hybridization
other
semiconductors
obtain
selective
reduction.
Lastly,
conclusions
future
prospectives
further
explore
field
included.
