Advanced Functional Materials,
Год журнала:
2023,
Номер
33(43)
Опубликована: Авг. 29, 2023
Abstract
Owing
to
their
high
carrier
recombination
speed
and
low
spectral
utilization,
it
is
difficult
further
improve
the
performance
of
photocatalysts.
In
this
study,
a
novel
metal–organic
framework
(MOF)
self‐assembled
cocrystal
material
developed.
The
guest
molecule
inserted
with
existing
MOF
ligand
form
an
organic
cocrystal.
highly
ordered
molecular
arrangement
tight
intermolecular
distances
between
donor
acceptor
molecules
promote
strong
π–π
charge
transfer
interaction,
facilitating
migration
separation
photogenerated
carriers.
addition,
efficient
redshifts
in
absorption
wavelength
enhance
response
visible
light.
Further,
unique
porous
structure
MOFs
beneficial
for
increasing
interfacial
area
photocatalytic
reactions,
metal
ions
can
become
center
capture,
effectively
inhibiting
recombination.
Consequently,
demonstrates
remarkable
efficiency
degradation
pollutants
water,
achieving
noteworthy
removal
95.31%
within
15
min.
Moreover,
photocatalyic
reaction
kinetics
constant
46.5
times
higher,
indicating
success
new
strategy
developing
systems.
ACS Nano,
Год журнала:
2024,
Номер
18(19), С. 12524 - 12536
Опубликована: Апрель 30, 2024
Highly
active
and
low-cost
co-catalysts
have
a
positive
effect
on
the
enhancement
of
solar
H2
production.
Here,
we
employ
two-dimensional
(2D)
MBene
as
noble-metal-free
co-catalyst
to
boost
semiconductor
for
photocatalytic
MoB
is
2D
nanoboride,
which
directly
made
from
MoAlB
by
facile
hydrothermal
etching
manual
scraping
off
process.
The
as-synthesized
with
purity
>95
wt
%
treated
ultrasonic
cell
pulverization
obtain
ultrathin
nanosheets
(∼0.61
nm)
integrated
CdS
via
an
electrostatic
interaction
strategy.
CdS/MoB
composites
exhibit
ultrahigh
production
activity
16,892
μmol
g–1
h–1
under
visible
light,
surpassing
that
pure
exciting
factor
≈1135%.
Theoretical
calculations
various
measurements
account
high
performance
in
terms
Gibbs
free
energy,
work
functions,
photoelectrochemical
properties.
This
discovers
huge
potential
these
promising
family
materials
high-efficiency
Journal of Advanced Ceramics,
Год журнала:
2023,
Номер
12(10), С. 1889 - 1901
Опубликована: Авг. 3, 2023
Two-dimensional
MXenes
are
generally
prepared
by
the
etching
of
acid
solutions.
The
as-synthesized
terminated
group
anions
(F–,
Cl–,
et
al.),
which
affect
electrochemical
performance
MXenes.
Here,
we
report
a
novel
method
to
prepare
Mo2C
MXene
from
Mo2Ga2C
hydrothermal
alkali
Highly
pure
was
successfully
synthesized
NaOH,
while
etchings
LiOH
and
KOH
were
failed.
concentration
temperature
time
strongly
purity
as-prepared
MXene.
Pure
could
be
20
M
NaOH
at
180
°C
for
24
h.
After
intercalation
hexadecyl
trimethyl
ammonium
bromide
90
96
h,
few-layer
obtained.
made
after
exhibited
excellent
as
anode
lithium-ion
battery,
compared
with
general
HF
reported
in
literature.
final
discharge
specific
capacity
266.73
mAh·g-1
0.8
A·g-1,
is
52%
higher
than
that
(175.77
mAh·g-1).
This
because
has
lager
surface
area,
lower
resistance,
O/OH
termination
without
anion
termination.
first
make
samples
this
significantly
better
etching.
Journal of Advanced Ceramics,
Год журнала:
2023,
Номер
12(5), С. 943 - 953
Опубликована: Фев. 17, 2023
Two-dimensional
(2D)
MoB
metal
borides
(MoB
MBene)
have
attracted
much
attention
due
to
their
fascinating
properties
and
functional
applications.
So
far,
work
on
the
synthesis
of
2D
nanosheets
by
acid
or
alkaline
etching
MoAlB
has
not
been
very
successful.
It
proposed
that
MBene
may
be
fabricated
chemical
a
Mo2AlB2
precursor,
but
further
investigations
were
performed
possibly
difficult
preparation
metastable
compound
at
high
temperatures
solid-state
reactions.
Here,
we
report
successful
deintercalation
Al
from
through
ZnCl2
molten
salt
approach
relatively
low
temperatures.
The
influence
temperature,
time,
starting
mixtures
formation
desirable
phases
investigated.
A
pure
was
synthesized
below
600
℃,
while
obtained
700
℃
MoAlB.
In
addition,
present
confirms
can
prepared
as-synthesized
precursor
in
LiF–HCl
solution.
Our
demonstrates
is
an
effective
method
prepare
MBene.
