ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(26), P. 33451 - 33460
Published: June 20, 2024
Pillar-layered
metal-organic
frameworks
(PLMOFs)
are
promising
gas
adsorbents
due
to
their
high
designability.
In
this
work,
CO2
storage
capacity
as
well
controllable
C2H2/CO2
separation
ability
acquired
by
rationally
manipulating
the
interlayer
stacking
in
pillar-layered
MOF
materials.
The
rational
construction
of
MOFs
started
from
2D
Ni-BTC-pyridine
layer,
an
isomorphic
structure
pioneering
MOF-1
reported
1995.
replacement
terminal
pyridine
groups
bridging
pyrazine
linkers
under
optimized
solvothermal
conditions
led
three
3D
PLMOFs
with
different
types
between
adjacent
Ni-BTC
layers,
named
PLMOF
1
(ABAB
stacking),
2
(AABB
and
3
(AAAA
stacking).
Regulated
layer
arrangements,
C2H2
adsorption
capacities
(273
K
bar)
1-3
vary
173.0/153.3,
185.0/162.4,
203.5/159.5
cm3
g-1,
respectively,
which
surpass
values
most
adsorbents.
Dynamic
breakthrough
experiments
further
indicate
that
have
performance,
can
successfully
overcome
challenge.
Specially,
remove
trace
(3%)
mixture
produce
high-purity
ethylene
(99.9%)
one
step
productivities
1.68,
2.45,
3.30
mmol
respectively.
GCMC
simulations
superior
unique
performance
mainly
ascribed
degrees
agglomeration
ultramicropores
these
PLMOFs.
Chemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
492, P. 152124 - 152124
Published: May 10, 2024
In
this
work,
we
report
the
preparation
of
one-dimensional
(1D)
bimetallic
zinc-cobalt
BTC
(BTC
=
1,3,5-benzenetricarboxylate)
metal–organic
frameworks
(MOFs)
with
varying
Zn/Co
ratios
and
their
conversion
to
hierarchical
porous
Co/C
hybrids
a
trace
amount
Zn
(<0.05
wt%).
The
crystallinity,
surface
area,
degree
graphitization
resulting
hybrid
are
governed
by
ratio
parent
Zn-Co
MOF.
product
derived
from
Zn-rich
MOF
(ZC31-BTC
precursor
3:1)
shows
higher
area
more
amorphous
structure
than
that
Co-rich
(ZC13-BTC
1:3).
When
used
for
electrochemical
sensing
dopamine
(DA),
glassy
carbon
electrode
(GCE)
modified
ZC31-BTC700°C
carbonized
at
700
°C)
sensitivity
0.0995nA
nM−1
cm−2,
wide
linear
range
0.1–500
µM,
low
limit
detection
(LoD)
0.04
µM
(signal-to-noise
(S/N)
3).
superior
DA
performance
is
attributed
its
high
density
defects
(evidenced
ID/IG
ratio),
rich
mesopores
(including
small
(<5
nm)
large
(>5
nm)),
leading
improved
ion/electron
transfer
(based
on
EIS
analysis),
electrochemically
active
sites
(confirmed
ECSA
measurements)
promote
greater
oxidation
molecules.
anti-interference
test
ZC31-BTC700°C-modified
GCE
(ZC31-BTC700°C/GCE)
indicates
selectivity
toward
even
in
presence
interferents,
such
as
glucose,
ascorbic
acid,
uric
acid.
Moreover,
stability
good
retainment
current
response
ZC31-BTC700°C/GCE
over
period
2
weeks.
Electrocatalytically
converting
nitrates
in
sewage
to
ammonia,
which
can
not
only
achieve
the
purpose
of
eliminating
but
also
obtaining
valuable
is
an
effective
supplement
traditional
Haber–Bosch
process.
Although
significant
progress
has
been
made
cathodic
catalyst
design,
overall
ammonia
electrolysis
from
nitrate
reduction
still
restricted
by
anodic
oxygen
evolution
heavily
relying
on
noble-based
catalysts.
Herein,
a
bimetallic
NiFe-MOF
nanosheet
array
electrode
fabricated
and
serves
as
efficient
bifunctional
for
reactions.
The
introduction
Fe
Ni-MOF
facilitates
formation
structure
with
higher
electrochemical
active
surface
area,
well
provides
synergetic
NiFe
sites.
reaches
greatly
enhanced
yield
rate
0.94
mmol
cm–2
h–1
Faradaic
efficiency
90.8%
at
cathode
−0.6
V
versus
reversible
hydrogen
electrode,
reaction
declined
overpotential
424
mV
50
mA
cm–2.
As
electrocatalysis,
performance
comparable
that
using
Pt
mesh
counter
electrode.
Energy Advances,
Journal Year:
2024,
Volume and Issue:
3(3), P. 636 - 647
Published: Jan. 1, 2024
The
incorporation
of
iron
into
the
cobalt-based
metal–organic
framework
modifies
electronic
environment
and
resulting
bimetallic
MOF
exhibits
enhanced
oxygen
evolution
reaction
performance.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(20), P. 12088 - 12097
Published: Jan. 1, 2024
Metal
organic
frameworks
(MOFs)
have
made
great
progress
in
the
field
of
fluorescent
sensing;
however,
whether
electronic
structure
and
recognized
sites
can
be
adjusted
by
external
functionalization
still
remains
challenging.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(11), P. 8652 - 8665
Published: May 20, 2024
Bimetallic
metal–organic
frameworks
(BMOFs)
have
shown
a
superior
oxygen
evolution
reaction
(OER)
performance,
attributed
to
the
synergistic
effects
of
dual
metal
sites.
However,
significant
role
these
dual-metal
synergies
in
OER
is
not
yet
fully
understood.
In
this
study,
we
employed
density
functional
theory
systematically
investigate
performance
NiAl-
and
NiFe-based
BMOFs
by
examining
all
possible
spin
states
each
intermediate
across
diverse
external
potentials
pH
environments.
We
found
that
state
featuring
shallow
hole
trap
Ni
ions
with
higher
oxidation
serve
as
strong
oxidizing
agents,
promoting
OER.
An
potential-induced
crossover
was
observed
intermediate,
resulting
changes
overall
activation
energies
due
altered
energy
levels.
Combining
constant
potential
method
electrochemical
nudged
elastic
band
method,
mapped
minimum
free
barriers
under
varied
considering
effect
for
both
NiAl
NiFe
BMOFs.
The
results
showed
exhibits
better
thermodynamics
kinetics,
which
good
agreement
experimentally
measured
polarization
curves
Tafel
plots.
Moreover,
improved
kinetics
only
lower
but
also
result
electrical
conductivity
arising
from
Ni–Fe
Specifically,
replacing
second
Al
Fe
leads
two
outcomes:
reduction
gap
effective
mass
compared
NiAl,
initiation
super-
double-exchange
interactions
within
Ni–F–Fe
chain,
thereby
enhancing
electron
transfer
hopping
leading
kinetics.
Nanomaterials,
Journal Year:
2025,
Volume and Issue:
15(2), P. 127 - 127
Published: Jan. 16, 2025
In
this
study,
square-star-shaped
leaf-like
BiVO4
nanomaterials
were
successfully
synthesized
using
a
conventional
hydrothermal
method.
The
microstructure,
elemental
composition,
and
gas-sensing
performance
of
the
materials
thoroughly
investigated.
Morphological
analysis
revealed
that
prepared
at
different
reaction
temperatures
exhibited
structures,
with
most
regular
dense
structures
formed
150
°C,
exhibiting
large
specific
surface
area
2.84
m2/g.
response
gas
sensors
to
target
gases
was
evaluated,
results
showed
sensor
strong
NH3.
At
optimal
operating
temperature
300
its
sensitivity
5
ppm
NH3
reached
13.3,
time
28
s
recovery
16
s.
Moreover,
excellent
repeatability
anti-interference
performance.
These
findings
indicate
holds
great
potential
in
environmental
monitoring
industrial
safety
detection,
offering
new
insights
for
development
high-performance
sensors.
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 21, 2025
Environmental
concerns
are
driving
the
development
of
eco-friendly
and
effective
methods
for
contaminant
monitoring
remediation.
In
this
study,
a
lanthanide
porphyrin-based
MOF
with
dual
fluorescence
sensing
photocatalytic
properties
was
synthesized
applied
detection
combined
removal
Cr(VI)
ciprofloxacin
(CIP).
Using
different
excitation
wavelengths,
material
exhibited
selective
via
quenching
CIP
through
enhancement.
The
variation
in
color
intensity
Tb-MOF
on
3D
EEM
spectra
enabled
simultaneous
both
contaminants.
Additionally,
demonstrated
synergistic
effect,
achieving
over
95%
rates
within
90
min,
consistent
catalytic
performance
across
four
cycles.
Mechanistic
investigations
revealed
that
(i)
strong
coordination
between
Tb3+
altered
surface
potential
Tb-MOF,
enhancing
adsorption;
(ii)
as
an
efficient
electron
acceptor,
promoted
transfer
its
reduction
to
Cr(III);
(iii)
superoxide
radicals
generated
type
I
mechanism
played
key
role
degradation.
This
research
underscores
multifunctional
platform
remediation
mixed
pollutants.
