ChemistrySelect,
Journal Year:
2024,
Volume and Issue:
9(48)
Published: Dec. 1, 2024
Abstract
Bismuth
bromide
oxide
(BiOBr)
photocatalysts
suffer
from
the
defects
of
low
light
energy
utilization,
efficiency,
and
easy
deactivation,
which
limit
their
wide
applications.
BiOBr‐based
Z‐scheme
heterojunctions
have
strong
redox
capabilities
due
to
unique
structure
that
can
improve
separation
efficiency
photogenerated
electrons
holes.
This
paper
describes
preparation
analyzes
morphology
structural
features
photocatalytic
materials
obtained
by
different
methods.
The
applications
heterojunction
composite
are
discussed,
including
hydrogen,
degradation
pollutants
in
wastewater,
carbon
dioxide
reduction,
as
well
analysis
catalyst's
mechanism
action
each
process
calculation
charge
transfer
paths
relevant
DFT.
results
show
activity
such
photocatalyst
be
improved
constructing
increase
photocarrier
transport
capacity.
But
mechanism,
interfacial
carriers
pathways,
needs
further
explored.
Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 22, 2025
Herein,
first,
MIL-125
samples
were
synthesized
via
a
hydrothermal
method.
Then,
Ag
species
doping
on
the
surface
of
photolysis
silver
nitrate.
Finally,
Z-scheme
MIL-125/Ag/BiOBr
composite
was
directed
liquid
assembly
The
structure,
morphology,
and
optical
properties
prepared
investigated
X-ray
diffraction,
scanning
electron
microscopy,
high-resolution
transmission
energy-dispersive
spectroscopic
mapping,
Fourier
transform
infrared
spectroscopy,
photoelectron
N2
adsorption–desorption
analysis,
ultraviolet–visible
photoluminescence
photovoltage
transient
photocurrent
response
electrochemical
impedance
spin
resonance
analysis.
Photocatalytic
experiments
indicated
that
photocatalytic
Cr6+
reduction
efficiency
heterojunctions
85.7%
at
pH
=
6,
which
approximately
5.5
2.2
times
higher
than
using
BiOBr
alone,
respectively.
This
performance
attributed
to
intimate
interfacial
contact
between
species,
increased
transfer
separation
photogenerated
carriers
inhibited
recombination
electrons
holes.
Furthermore,
possible
mechanism
photocatalyst
proposed.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 20, 2024
Abstract
The
organic
photoelectrochemical
transistor
(OPECT)
biosensing
relies
solely
on
a
singular
signal
readout
inherently,
which
restrains
the
precision
and
dependability
nestled
within
pertinent
biological
measurements.
Herein,
high‐precision
magnetic
assisted
OPECT
smartphone
colorimetric
(SCL)
dual‐mode
platform
is
first
established
for
detecting
harmful
algal
toxin
okadaic
acid
(OA)
by
biocatalytic
reaction.
MXene@SnO
2
‐Ce‐MOF
(MXSnO/Ce‐MOF)
Z‐scheme
heterojunctions
with
abundant
oxygen
vacancies
are
prepared
as
photoactive
materials.
Initially,
in
presence
of
OA,
coupling
trigger
DNA
(tDNA)
to
beads
(MBs)
via
anchor
(aDNA)
released
through
interaction
target
analyte
aptamer.
Subsequently,
carried
tDNA
triggers
HCR
between
two
hairpin
sequences,
producing
long
double
helix
chains
capture
glucose
oxidase
(GOx).
obtained
GOx
supernatant
catalyzes
produce
H
O
,
can
oxidize
Ce‐MOF,
leading
alteration
electrode
color
significant
decrease
overall
photocurrent
MXSnO/Ce‐MOF.
Crucially,
novel
OPECT‐SCL
biosensor
exhibits
excellent
sensitivity
precision,
boasting
detection
thresholds
low
42.9
p
M
1.2
n
respectively,
accomplishes
automated
OA
real
samples.
proposed
dual‐signal
measurement
model
constitutes
sensitive,
portable,
precise
quantification
marine
toxins.
