Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(23)
Published: April 3, 2024
Abstract
Solar
energy
can
be
utilized
in
photocatalysis
technology
to
realize
light‐driven
hydrogen
peroxide
(H
2
O
)
production,
a
green
chemical
synthesis
route.
Designing
high‐performance
photocatalysts
is
critical
achieving
practical
solar
H
production.
During
the
past
decade,
significant
research
progress
made
photocatalytic
materials
for
Particularly
2D
materials‐based
stand
out
due
their
unique
physical
and
properties.
This
review
highlights
intricate
relationship
between
material
innovation
photochemical
It
starts
with
fundamental
principles
of
generation,
focusing
on
crucial
steps
such
as
photon
absorption,
carrier
dynamics,
surface
reactions,
challenges
that
solve
at
each
step.
Then,
various
production
are
introduced
detail.
Engineering
strategies
optimize
performance
discussed
afterward.
Finally,
future
opportunities
designing
outlined.
expected
inspire
engineering
conversion
other
chemicals.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(7), P. 4728 - 4737
Published: March 13, 2024
Imine-linked
isomeric
covalent
organic
frameworks
(COFs)
with
opposite
linkage
orientations
are
not
rare,
but
their
structure
and
photocatalytic
property
corrections
still
puzzling,
let
alone
the
emerging
photosynthetic
H2O2
performance.
Herein,
a
pair
of
COFs
(TB-COF
TA-COF)
reversed
imine
linkages
was
fabricated.
Compared
to
TA-COF,
TB-COF
exhibited
larger
dipole
moments
better
charge
carrier
separation
efficiency,
resulting
in
superior
photosynthesis
capability
via
dominant
oxygen
reduction
reaction
(ORR)
paths
(O2–O2•––H2O2
O2–O2•––O21–H2O2)
feeble
water
oxidation
(WOR)
paths.
With
no
sacrificial
agents
air,
rates
were
5186
μmol
g–1
h–1
4111
natural
seawater,
respectively.
The
seawater-produced
can
be
directly
utilized
for
tetracycline
degradation,
manifesting
big
picture
wastewater
treatment
by
H2O2.
Theoretical
calculations
revealed
that
hydroxyl-rich
benzene
ring
photooxidation
part
triazine
unit
primary
photoreduction
part.
Through
linkage-orientation
regulation,
electronic
structures,
migration
property,
energy
barrier
rate
determination
step
2e–
ORR
WOR
well-modulated.
current
work
provides
insight
into
effect
orientation
on
performance
may
enlighten
design
catalysts
photosynthesis.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(32)
Published: May 13, 2024
Abstract
Covalent
organic
frameworks
(COFs)
are
promising
photocatalysts
for
H
2
O
production
from
water
via
oxygen
reduction
reaction
(ORR).
The
design
of
COFs
efficient
indubitably
hinges
on
an
in‐depth
understanding
their
ORR
mechanisms.
In
this
work,
taking
imine‐linked
COF
as
example,
we
demonstrate
that
protonation
the
functional
units
such
imine,
amine,
and
triazine,
is
a
highly
strategy
to
upgrade
activity
levels
synthesis.
not
only
extends
light
absorption
but
also
provides
proton
sources
directly
participate
in
generation.
Notably,
simplifies
pathways
,
i.e.
indirect
superoxide
radical
(
)
mediated
route
direct
one‐step
two‐electron
route.
Theoretical
calculations
confirm
favors
synthesis
due
easy
access
protons
near
sites
removes
energy
barrier
generating
*OOH
intermediate.
These
findings
extend
mechanistic
insight
into
photosynthesis
provide
rational
guideline
upgradation
COFs.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(40)
Published: July 18, 2024
Abstract
The
integration
of
electron
donor
(D)
and
acceptor
(A)
units
into
covalent
organic
frameworks
(COFs)
has
received
increasing
interest
due
to
its
potential
for
efficient
photocatalytic
hydrogen
(H
2
)
evolution
from
water.
Nevertheless,
the
advancement
D–A
COFs
is
still
constrained
by
limited
investigations
on
engineering,
which
enables
highly
effective
charge
transfer
pathways
in
deliver
photoexcited
electrons
a
preferential
orientation
enhance
performance.
Herein,
two
systems
with
D–A–A
configurations
based
molecular
engineering
strategy
are
proposed
construct
three
distinct
COFs.
Specifically,
TAPPy‐DBTDP‐COF
merging
one
pyrene‐based
benzothiadiazole
acceptors
realized
an
average
H
rate
12.7
mmol
h
−1
g
under
visible
light,
among
highest
ever
reported
typical
D–A‐type
COF
systems.
combination
experimental
theoretical
analysis
signifies
crucial
role
dual‐acceptor
arrangement
promoting
exciton
dissociation
carrier
migration.
These
findings
underscore
significant
structural
design,
conducive
separation
holes
resulting
superior
activities.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(29)
Published: March 14, 2024
Abstract
Porous
organic
polymers
have
an
outstanding
performance
in
the
field
of
photocatalysis
with
advantage
diverse
structure
composition
and
purposeful
molecular
design.
However,
inherent
high
impedance
poor
electrical
conductivity
semiconductors
still
restrict
charge
transfer
efficiency
thus
discount
photocatalytic
performance.
Herein,
study
reports
a
highly
conductive
covalent
triazine
framework
(CTF)
loading
carbon
quantum
dots
(CQDs)
into
porous
as
electron
transport
medium.
The
addition
CQDs
(0.5
wt%)
can
enhance
electronic
CTF
by
tenfold.
In
addition,
as‐prepared
CQD‐CTFs
express
much‐promoted
separation
efficiency.
Furthermore,
embedded
improve
oxidization
capacity
increase
affinity
H
+
due
to
more
negative
zeta
potential.
enhanced
oxidizing
ability
increased
are
positive
for
water
oxidation
reaction
(WOR)
oxygen
reduction
(ORR)
process
hydrogen
peroxide
(H
2
O
)
generation,
respectively.
optimized
CQD‐CTF
exhibits
generation
rate
up
1036
µmol
g
−1
h
pure
without
any
sacrificial
agent
under
visible
light,
which
is
4.6
times
than
pristine
CTF.
This
work
provides
new
idea
efficient
production
semiconductors.
