Self-assembled
nanomaterials
have
aroused
enormous
interest
owing
to
their
enhanced
physicochemical
properties
as
compared
monomers.
Herein,
two-dimensional
Nd-based
polyoxometalate
clusterphene
(Nd-POMCene)
with
a
highly
ordered
honeycomb
structure
is
synthesized
by
self-assembly,
which
demonstrated
efficient
photocatalytic
degradation
performance
towards
organic
dyes,
such
Rhodamine
B
(RhB),
methylene
blue,
and
crystal
violet.
Especially,
RhB
can
be
totally
photodegraded
Nd-POMCene
under
the
simulated
sunlight
within
1
h
while
degraded
efficiency
of
97.50
%
achieved
natural
light
2
h.
As
proved
density
functional
theory
results,
POMCene
beneficial
for
enhancing
associated
improved
separation/transmission
photogenerated
electron/hole
pairs
large-scale
electron
delocalization.
The
mechanism
study
provides
compelling
evidence
demonstrate
that
all
holes,
hydroxyl
radicals,
superoxide
radicals
chemically
account
photodegradation
Nd-POMCene.
Finally,
it
verified
there
much
less
toxicity
in
products
RhB.
Journal of The Electrochemical Society,
Год журнала:
2024,
Номер
171(3), С. 037524 - 037524
Опубликована: Март 8, 2024
Metronidazole
(MTD)
is
an
antibiotic
that
commonly
used
to
treat
pathogens
and
protozoal
infections,
which
have
a
highly
harmful
impact
on
human
health
domestic
animals.
Hence,
the
detection
of
MTD
necessary
avoid
environmental
pollution.
The
hydrothermal
technique
has
been
utilized
prepare
Nickel
Tungsten
oxide
(NiWO
4
)
nanosheets
were
anchored
with
carbon
nanofiber
(CNF)
produce
CNF/NiWO
nanocomposite,
nanocomposite
coated
glassy
electrode
(GCE)
applied
electrochemical
MTD.
Besides,
field
emission
scanning
electron
microscope
(FESEM),
transmission
(TEM),
energy
dispersive
X-ray
analysis
(EIS),
Fourier-transform
infrared
spectroscopy
(FTIR),
diffraction
(XRD),
photoelectron
spectroscopy.
Moreover,
impedance
cyclic
voltammetry
studies
(CV),
differential
pulse
(DPV)
also
handled
for
identification
behavior
GCE/CNF/NiWO
responses.
Finally,
shows
low
limit
0.4
μ
M,
wide
linear
response
range
0.01–650
higher
sensitivity
0.274
A
M
−1
cm
−2
,
better
repeatability,
reproducibility,
excellent
stability.
prepared
electrodes
employed
detect
in
tap
water
urine
samples
acceptable
recoveries.
The
strategic
post-synthetic
modification
of
engineered
S-scheme
heterojunctions
represents
a
potent
and
manipulable
approach
to
significantly
enhance
photocatalytic
activity.
This
study
details
the
synthesis
innovative
photocatalysts
via
deposition
NiS
nanoparticles
onto
CoWO4/ZnIn2S4
(CWO/ZIS-NiS),
facilitated
by
solvothermal
photochemical
methodologies.
Under
visible
light
irradiation,
hydrogen
production
rate
CWO/ZIS-NiS
was
22.398
mmol·g−1·h−1,
which
15
times
higher
than
that
ZnIn2S4.
XPS,
EPR,
SPV
DFT
calculations
were
used
analyze
charge
transfer
path
reasons
for
performance
improvement
catalyst.
construction
theS-scheme
heterojunction,
along
with
interfacial
electric
field
(IEF)
act
as
reaction
center,
identified
primary
reason
enhanced
work
provides
guidance
design
efficient
systems
using
synergistic
effect
between
cocatalysts
heterojunctions.
ACS Applied Nano Materials,
Год журнала:
2024,
Номер
7(22), С. 26175 - 26186
Опубликована: Ноя. 13, 2024
The
safe
use
of
methanol-reforming
hydrogen
fuel
cells
requires
the
accurate
identification
and
detection
gases
involved
in
methanol
hydrogen.
To
address
this
issue,
we
construct
unique
gas
sensors
by
uniformly
growing
zeolitic
imidazolate
framework
(ZIF)
(ZIF-67
ZIF-8)
particles
on
surface
functionalized
V2CTx
(F-V2CTx),
which
are
prealkalized
then
grafted
with
(3-aminopropyl)
triethoxysilane
(APTES).
In
achieved
composite
F-V2CTx/ZIFs,
provides
a
fast
electron
transport
channel,
ZIFs
provide
adsorption
sites
for
specific
gases.
Thus,
different
ZIF
modifications,
V2CTx/ZIF-based
modulated
to
realize
selective
or
This
reveals
that
F-V2CTx/ZIF-8
F-V2CTx/ZIF-67
exhibit
response/recovery
(5/4
s
500
ppm
H2)
(3/12
10
methanol),
respectively.
sensor
exhibits
capability
detecting
sub
methanol,
theoretical
limit
72
ppb,
while
shows
good
selectivity
at
room
temperature.
mechanisms
gas-sensing
enhancement
gas-selectivity
modulation
V2CTx/ZIF
clarified
based
heterojunction
effect
first-principles
calculations,
work
expands
application
nanocomposites
composed
field
proposes
an
effective
strategy
modifications.
Materials,
Год журнала:
2024,
Номер
17(24), С. 6225 - 6225
Опубликована: Дек. 20, 2024
The
rational
design
of
heterojunction
photocatalysts
enabling
fast
transportation
and
efficient
separation
photoexcited
charge
carriers
is
the
key
element
in
visible
light-driven
photocatalyst
systems.
Herein,
we
develop
a
unique
Z-scheme
consisting
NiMoO4
microflowers
(NMOF)
ZIF67,
referred
to
as
ZINM
(composite),
for
purpose
antibiotic
degradation.
ZIF67
was
produced
by
solution
process,
whereas
NMOF
synthesized
via
coprecipitation
with
glycine
surfactant.
exhibited
monoclinic
phase
highly
oriented,
interconnected
sheet-like
morphology.
showed
better
optical
transfer
characteristics
than
its
constituents,
NiMoO4.
Consequently,
developed
superior
photocatalytic
redox
capability;
ZINM30
(the
composite
30
wt.%
loaded)
could
degrade
91.67%
tetracycline
86.23%
norfloxacin
within
120
min.
This
enhanced
activity
attributable
reduced
bandgap
(Egap
=
2.01
eV),
morphology,
high
specific
surface
area
(1099.89
m2/g),
intimate
contact
between
NiMoO4,
which
facilitated
establishment
heterojunction.
Active
species
trapping
tests
verified
that
•O2−
h+
were
primary
species,
supporting
proposed
degradation
mechanism.
work
highlights
valid
ZIF67/NiMoO4
system
carrier
and,
therefore,
antibiotics.
Self-assembled
nanomaterials
have
aroused
enormous
interest
owing
to
their
enhanced
physicochemical
properties
as
compared
monomers.
Herein,
two-dimensional
Nd-based
polyoxometalate
clusterphene
(Nd-POMCene)
with
a
highly
ordered
honeycomb
structure
is
synthesized
by
self-assembly,
which
demonstrated
efficient
photocatalytic
degradation
performance
towards
organic
dyes,
such
Rhodamine
B
(RhB),
methylene
blue,
and
crystal
violet.
Especially,
RhB
can
be
totally
photodegraded
Nd-POMCene
under
the
simulated
sunlight
within
1
h
while
degraded
efficiency
of
97.50
%
achieved
natural
light
2
h.
As
proved
density
functional
theory
results,
POMCene
beneficial
for
enhancing
associated
improved
separation/transmission
photogenerated
electron/hole
pairs
large-scale
electron
delocalization.
The
mechanism
study
provides
compelling
evidence
demonstrate
that
all
holes,
hydroxyl
radicals,
superoxide
radicals
chemically
account
photodegradation
Nd-POMCene.
Finally,
it
verified
there
much
less
toxicity
in
products
RhB.
