Chinese Journal of Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 21, 2025
Comprehensive
Summary
Photocatalytic
synthesis
of
hydrogen
peroxide
(H
2
O
)
from
air
and
water
presents
a
sustainable
efficient
alternative
to
the
traditional
anthraquinone
method.
Therefore,
design
photocatalysts
for
H
production
are
important.
In
this
work,
we
apply
nitrogen‐site
engineering
strategy
achieve
high‐performance
by
synthesizing
three
imine‐
linked
oligo(phenylenevinylene)‐based
covalent
organic
frameworks
(OPV‐COFs)
doped
with
different
numbers
nitrogen
atoms
(denoted
as
COF‐920‐
n
N,
=
0,
1,
3).
characterization
confirmed
high
crystallinity
porosity
COFs,
critical
photocatalysis.
Each
OPV‐COF
exhibited
ability
rapidly
synthesize
using
water,
COF‐920‐1N
achieving
highest
rate
4288
μmol·g
–1
·h
under
visible
light,
higher
than
those
most
other
reported
COFs.
Mechanism
studies
demonstrated
that
introduction
pyridine
at
junction
changes
electronic
structure
electron
transfer
path
within
enhancing
photogenerated
mobility
reducing
electron‐hole
recombination.
This
study
not
only
pioneers
class
OPV‐COFs
photocatalytic
,
but
also
sets
foundational
rational
COFs
in
applications.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 16, 2025
Abstract
The
rational
design
of
S‐scheme
heterojunctions
holds
significant
potential
for
efficient
photocatalytic
energy
conversion,
attributed
to
their
enhanced
carrier
separation
efficiency
and
high
redox
capacity.
Nevertheless,
achieving
precise
control
transfer
dynamics
in
remains
a
substantial
challenge.
Herein,
unique
architecture
is
devised
featuring
porous
rod‐shaped
Fe
2
O
3
particles
loaded
onto
single‐sites
modified
g‐C
N
4
nanosheets
via
mediated
heterocomponent
anchorage,
the
directed
growth
using
as
anchoring
points,
thereby
forming
O─Fe─N
interfacial
chemical
bonds
(ICBs)
generating
abundant
nitrogen
defects
(FeO/FeCN‐N
v
).
Photophysical
processes
are
further
investigated
femtosecond
transient
absorption
spectroscopy
(fs‐TAS)
situ
irradiated
X‐ray
photoelectron
(ISI‐XPS)
with
an
adjustable
wavelength
irradiation
light
source.
Encouragingly,
results
reveal
internal
electric
field
(IEF)
constructed
at
these
semicoherent
phase
boundaries,
creating
asymmetrical
charge
distribution.
Simultaneously,
introduce
additional
defect
level
that
accelerates
electron
through
IEF,
enabling
more
rapid
migration
surface‐active
sites
both
styrene
epoxidation
hydrogen
evolution.
synergistic
effect
ICBs
coupling
regulating
offers
new
insights
into
photocatalysis,
paving
way
advancements
conversion.
Chinese Journal of Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 21, 2025
Comprehensive
Summary
Photocatalytic
synthesis
of
hydrogen
peroxide
(H
2
O
)
from
air
and
water
presents
a
sustainable
efficient
alternative
to
the
traditional
anthraquinone
method.
Therefore,
design
photocatalysts
for
H
production
are
important.
In
this
work,
we
apply
nitrogen‐site
engineering
strategy
achieve
high‐performance
by
synthesizing
three
imine‐
linked
oligo(phenylenevinylene)‐based
covalent
organic
frameworks
(OPV‐COFs)
doped
with
different
numbers
nitrogen
atoms
(denoted
as
COF‐920‐
n
N,
=
0,
1,
3).
characterization
confirmed
high
crystallinity
porosity
COFs,
critical
photocatalysis.
Each
OPV‐COF
exhibited
ability
rapidly
synthesize
using
water,
COF‐920‐1N
achieving
highest
rate
4288
μmol·g
–1
·h
under
visible
light,
higher
than
those
most
other
reported
COFs.
Mechanism
studies
demonstrated
that
introduction
pyridine
at
junction
changes
electronic
structure
electron
transfer
path
within
enhancing
photogenerated
mobility
reducing
electron‐hole
recombination.
This
study
not
only
pioneers
class
OPV‐COFs
photocatalytic
,
but
also
sets
foundational
rational
COFs
in
applications.
