Abstract
Hydrogen
peroxide
(H
2
O
),
an
environmentally
benign
oxidizer,
finds
extensive
applications
in
pulp
bleaching,
wastewater
treatment,
and
medical
sterilization.
Photocatalytic
H
synthesis
via
water
oxygen
activation
on
semiconductor
surfaces
presents
a
sustainable
production
strategy.
Notably,
structurally
tunable
organic
photocatalysts
have
emerged
as
promising
candidates,
which
targeted
molecular
engineering
can
boost
the
photocatalytic
performance
by
enlarging
specific
surface
areas,
extending
light
absorption
ranges,
facilitating
charge
carrier
transport‐separation
dynamics.
Given
growing
significance
of
synthesis,
comprehensive
review
this
field
has
become
imperative.
This
paper
offers
systematic
examination
visible‐light‐driven
using
various
photocatalysts,
including
graphitic
carbon
nitride
(g‐C
3
N
4
resorcinol‐formaldehyde
(RF)
resin,
covalent
frameworks
(COFs),
linear
conjugated
polymers
(LCPs).
The
focus
lies
fundamental
mechanistic
elucidation,
design
reaction
pathways
active
sites,
modification
strategies,
establishment
efficient
systems.
Extensive
studies
correlated
efficiency
with
interfacial
electron
transfer
kinetics
spatial
separation.
Therefore,
we
methodically
analyze
key
determinants
governing
photogenerated
dynamics
present
strategies
for
enhancement.
Furthermore,
discuss
emerging
application
scenarios
enabled
generation.
Importantly,
critically
evaluates
persistent
challenges
cutting‐edge
solutions
visible‐light‐mediated
ultimately
providing
principles
developing
high‐efficiency
photocatalysts.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 24, 2025
Abstract
Photosynthesizing
H
2
O
from
real
seawater
is
a
promising
and
green
avenue
but
suffers
salt‐deactivated
effects
with
limitations
on
stability
photocatalytic
activity.
Herein,
by
the
Pictet–Spengler
reaction,
two
fully
conjugated
thieno[3,2‐c]pyridine‐linked
covalent
organic
frameworks
(named
TBA‐COF
TCA‐COF)
are
synthesized
for
photoproduction
first
time.
Without
sacrificial
agents
in
,
TCA‐COF
exhibit
impressive
generation
rates
of
8878
6023
µmol
g
−1
h
solar‐to‐chemical
conversion
efficiency
0.62%
0.42%,
respectively,
superior
to
their
Schiff
base
analogs.
Further
experimental
theoretical
investigations
reveal
that,
compared
imine‐linkage
counterparts,
one‐pot
cyclized
TCA‐COF,
reaction
improves
charge
carrier
separation
efficiency,
alters
photoreduction
center
triazine
benzene
parts
pyridine
units,
modulates
energy
band
structures
drive
2e
−
oxygen
reduction
water
oxidation
thereby
enhances
photosynthetic
Notably,
seawater‐produced
flow
reactors
packed
can
be
directly
utilized
E.
coli
sterilization.
The
present
study
highlights
construction
robust
COFs
thieno[3,2‐c]pyridine
linkage
via
sustainable
producing
seawater.
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Март 11, 2025
Photocatalysis
provides
a
sustainable
and
environment-friendly
strategy
to
produce
H2O2,
yet
the
catalytic
efficiency
of
H2O2
overall
photosynthesis
(O2
+
2H2O
→
2H2O2)
needs
be
further
improved,
especially
in
absence
additional
cocatalysts,
photosensitizers
sacrificial
agents.
Here
we
find
that
hydrogen-bonded
organic
frameworks
can
serve
as
photocatalysts
for
under
above-mentioned
conditions.
Specifically,
constructed
donor–acceptor
framework
exhibits
high
photocatalytic
activity
photosynthesis,
with
production
rate
681.2
μmol
g-1
h-1.
The
control
experiments
theoretical
calculation
revealed
structures
not
only
accelerate
charge
separation
transfer
but
also
optimize
reaction
pathways,
which
significantly
boosts
photosynthesis.
This
work
insights
into
design
development
efficient
A
series
were
developed
production.
These
materials
are
shown
facilitate
pathway
toward
H2O2.
Photocatalytic
hydrogen
peroxide
production
from
water
and
oxygen
offers
a
clean
sustainable
alternative
to
the
conventional
energy-intensive
anthraquinone
oxidation
method.
Compared
powdered
covalent
triazine
frameworks
(CTFs),
film
morphology
of
CTFs
provides
better
connectivity
in
2D,
yielding
several
advantages:
more
efficient
connections
between
active
sites,
reduced
electron-hole
pair
recombination,
increased
resistance
superoxide
radical
induced
corrosion,
decreased
light
scattering.
Leveraging
these
benefits,
it
has
incorporated
dual
sites
for
both
reduction
reaction
(ORR)
(WOR)
into
CTF
system.
This
dual-active
demonstrated
an
exceptional
rate
19
460
µmol
h⁻¹
m⁻
