ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(7), P. 5909 - 5917
Published: March 30, 2023
Plasmonic
Au
nanoparticles
were
deposited
over
photocatalytic
BiVO4/BiOBr
nanosheets
with
different
loadings
in
the
range
of
0.5–5%
(w/w)
to
boost
reactivity
via
surface
plasmonic
resonance.
The
results
showed
that
highest
benzyl
alcohol
conversion
(100%)
and
maximum
benzaldehyde
yield
(99%)
obtained
using
BiVO4/BiOBr/Au
3%
after
4
h
irradiation.
Electron
paramagnetic
resonance
analysis
trapping
experiments
revealed
singlet
oxygen
is
dominant
species
produced
within
system
suggest
it
main
driving
oxidation
benzaldehyde.
proposed
mechanism
involves
irradiation
light
excite
its
electrons
state
produce
excitons,
which
eventually
produces
triplet
excitons
intersystem
crossing.
Dissolved
O2
subsequently
reacts
these
oxygen.
Moreover,
energy
barrier
intrinsic
reaction
indicated
thermodynamically
favorable.
These
demonstrate
unique
effects
on
activity,
can
be
adapted
selective
reactions.
Small Structures,
Journal Year:
2024,
Volume and Issue:
5(6)
Published: Feb. 5, 2024
The
high‐value
utilization
of
biomass
feedstock
is
fascinating
but
limited
by
efficient
C─H
activation
to
break
C─C
bonds.
Herein,
F‐Fe
2
O
3
‐Mn
photoanodes
with
modulable
compressive
strain
are
fabricated
gradient
infusion
Mn
into
F‐doped
hematite
(F‐Fe
),
which
illustrated
be
highly
for
oxidative
bond
cleavage
various
bio‐based
1,2‐diols
produce
benzoic
acids
or
aromatic
ketones
(94.5–97.2%
yields)
in
photoelectrocatalytic
(PEC)
device,
coupling
a
high
H
production
1180
μmol
cm
−2
(≈96%
yield).
doping
species
the
photoelectrode
bulk
results
improved
photoexcited
carriers
separation
and
transfer
efficiency
(3.41
mA
).
On
other
hand,
lattice
distortion
induced
also
leads
effect
on
F─Fe
─Mn,
can
precisely
modulate
electronic
structure.
Control
experiments,
situ
characterization,
theoretical
calculations
elaborate
that
capable
adjusting
position
d
‐band
center
facilitate
activation,
remarkably
enabling
PEC
breaking
1,2‐diol
desorption
oxidized
product.
This
“one‐stone‐two‐bird”
strategy
presents
straightforward
protocol
efficiently
bonds
organic
transformations
via
oxidation.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(17)
Published: March 1, 2024
Abstract
Traditional
H
2
O
cleavage
mediated
by
macroscopic
electron
transfer
(MET)
not
only
has
low
utilization
of
,
but
also
sacrifices
the
stability
catalysts.
We
present
a
non‐redox
hydroxyl‐enriched
spinel
(CuFe
4
)
catalyst
with
dual
Lewis
acid
sites
to
realize
homolytic
.
The
results
systematic
experiments,
in
situ
characterizations,
and
theoretical
calculations
confirm
that
tetrahedral
Cu
optimal
acidity
strong
delocalization
can
synergistically
elongate
O−O
bonds
(1.47
Å
→
1.87
Å)
collaboration
adjacent
bridging
hydroxyl
(another
site).
As
result,
free
energy
is
decreased
(1.28
eV
0.98
eV).
be
efficiently
split
into
⋅OH
induced
CuFe
without
MET,
which
greatly
improves
(65.2
%,
nearly
times
than
traditional
catalysts).
system
assembled
affords
exceptional
performance
for
organic
pollutant
elimination.
scale‐up
experiment
using
continuous
flow
reactor
realizes
long‐term
(up
600
mL),
confirming
tremendous
potential
practical
applications.
ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(7), P. 5909 - 5917
Published: March 30, 2023
Plasmonic
Au
nanoparticles
were
deposited
over
photocatalytic
BiVO4/BiOBr
nanosheets
with
different
loadings
in
the
range
of
0.5–5%
(w/w)
to
boost
reactivity
via
surface
plasmonic
resonance.
The
results
showed
that
highest
benzyl
alcohol
conversion
(100%)
and
maximum
benzaldehyde
yield
(99%)
obtained
using
BiVO4/BiOBr/Au
3%
after
4
h
irradiation.
Electron
paramagnetic
resonance
analysis
trapping
experiments
revealed
singlet
oxygen
is
dominant
species
produced
within
system
suggest
it
main
driving
oxidation
benzaldehyde.
proposed
mechanism
involves
irradiation
light
excite
its
electrons
state
produce
excitons,
which
eventually
produces
triplet
excitons
intersystem
crossing.
Dissolved
O2
subsequently
reacts
these
oxygen.
Moreover,
energy
barrier
intrinsic
reaction
indicated
thermodynamically
favorable.
These
demonstrate
unique
effects
on
activity,
can
be
adapted
selective
reactions.
