Nanomaterials,
Год журнала:
2025,
Номер
15(7), С. 535 - 535
Опубликована: Апрель 1, 2025
Fabricating
electrodes
with
high
electrocatalytic
efficiency
is
crucial
for
the
commercial
feasibility
of
vanadium
redox
flow
batteries
(VRFBs).
In
this
study,
metal–organic
framework-derived
ZnO
and
Fe2O3
a
specific
surface
area
were
successfully
synthesized
via
high-energy
ball
milling.
The
nanocomposite
material
(ZnO-Fe2O3)
was
prepared
through
ultrasonication
coated
on
graphite
felt
using
dip
coating,
serving
as
positive
electrode
VRFB.
These
modified
control
polarization
losses,
leading
to
voltage
(VE)
energy
(EE),
even
at
current
densities.
Consequently,
nanocomposite-modified
shows
VE
87%
EE
84%
50
mA/cm2,
surpassing
performance
individual
materials.
retains
its
without
degradation
over
250
cycles
density
150
mA/cm2.
This
enhanced
due
improved
kinetics
reduced
losses
in
VO2+/VO2+
couple,
enabled
by
material.
Dalton Transactions,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
The
hybrid
bentonite/ZnO
composites
based
on
the
metal-organic
framework
(MOF)
ZIF-8
were
synthesized
by
a
microwave
method
using
2-methylimidazole
and
zinc
nitrate,
incorporating
natural
bentonite
(5,
15,
25
wt%)
followed
thermal
treatment
at
550
°C.
as-prepared
materials
characterized
for
their
crystal
structure,
morphology,
composition,
surface
chemical
states,
textural
optical
properties.
photocatalytic
activity
of
ZnO/bentonite
was
evaluated
in
degradation
mixture
solution
endocrine
disruptors
(EDCs)
(bisphenol
A,
propylparaben,
17α-ethinylestradiol,
5
mg
L-1
each)
pH
=
7
under
simulated
solar
light.
material
characterization
showed
that
into
ZnO
increased
specific
area,
facilitated
formation
oxygen
vacancies,
decreased
recombination
rate
e-/h+
pairs
compared
to
ZnO.
revealed
15
wt%/ZIF-8
derived
composite
enhanced
ZnO,
allowing
total
61.26%
mineralization
EDC
240
min.
Furthermore,
effluent
decrease
estrogenic
end
process,
with
no
by-products
formed
present
activity.
bentonite/ZIF-8
is
proposed
as
an
alternative
ZnO-based
catalyst
effectively
removes
compounds
from
aqueous
media.
Photocatalysis
plays
a
pivotal
role
in
sustainable
technology,
driving
pollutant
degradation
and
energy
conversion
through
solar-driven
chemical
reactions.
However,
conventional
photocatalysts
are
limited
by
their
structural
tunability,
hindering
adaptability
to
evolving
photocatalytic
applications.
This
underscores
the
urgent
need
for
innovative
approaches
overcome
these
challenges.
Metal-organic
frameworks
(MOFs),
with
tunable
structures,
offer
promising
solution
overcoming
limitations.
Here,
we
demonstrate
comprehensive
overview
of
regulation
strategies
MOFs,
emphasizing
evolution
across
multiple
scales
enhance
performance.
review
begins
detailing
photoelectric
characteristics
MOFs
development
effectiveness.
An
in-depth
analysis
is
undertaken
into
-
macroscale,
mesoscale,
atomic-scale,
electronic-scale.
The
synergistic
interactions
among
levels
further
explored,
revealing
collective
contribution
improved
efficiency.
These
insights
emphasize
that
adaptable
design
serve
as
pathways
advancements
photocatalyst
engineering.
Finally,
examine
current
applications
structures
provide
perspectives
on
future
challenges
this
field.
offers
critical
MOF
regulation,
highlighting
its
innovations
expanding
technologies.
RSC Sustainability,
Год журнала:
2023,
Номер
1(8), С. 2081 - 2091
Опубликована: Янв. 1, 2023
ZIF-8-derived
porous
ZnO
is
a
facile,
low-cost
and
environmentally
benign
catalyst
with
exceptional
catalytic
efficiency
for
ammonium
perchlorate
thermal
decomposition
at
minimal
usage.
