ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
17(1), P. 42 - 66
Published: Dec. 23, 2024
Hydrogen
peroxide
(H2O2)
finds
extensive
applications
in
various
industries,
particularly
the
environmental
field.
The
photocatalytic
production
of
H2O2
through
oxygen
reduction
reaction
(ORR)
or
water
oxidation
(WOR)
offers
a
promising
approach.
However,
several
challenges
hinder
effective
on-site
production,
such
as
rapid
electron–hole
pair
recombination,
inefficient
visible
light
utilization,
and
limited
selectivity
formation.
Thus,
developing
efficient
photocatalysts
to
overcome
these
is
crucial.
This
review
comprehensively
outlines
development
their
modification
techniques.
It
also
summarizes
compares
yield
apparent
quantum
among
with
without
use
organic
sacrificial
reagents.
Density
functional
theory
(DFT)
calculations
propose
band
structure
mechanisms
underlying
H2O2.
Finally,
this
explores
potential
photocatalytically
produced
guides
design
optimization
photocatalysts,
facilitating
continued
advancement
application
contexts.
Macromolecular Rapid Communications,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 12, 2025
Abstract
Photocatalytic
production
of
hydrogen
peroxide
(H
2
O
)
represents
a
significant
approach
to
achieving
sustainable
energy
generation
through
solar
energy,
addressing
both
shortages
and
environmental
pollution.
Among
various
photocatalytic
materials,
covalent
organic
frameworks
(COFs)
have
gained
widespread
attention
in‐depth
research
due
their
unique
advantages,
including
high
porosity,
predesignability,
atomic‐level
tunability.
In
recent
years,
progress
has
been
made
in
the
development,
performance
enhancement,
mechanistic
understanding
COF‐based
photocatalysts.
This
review
focuses
on
latest
advancements
H
using
COFs,
particularly
emphasizing
rational
design
COF
structures
regulate
catalytic
exploring
fundamental
processes
involved
photocatalysis.
Based
current
achievements
this
field,
paper
also
discusses
existing
challenges
future
opportunities,
aiming
provide
reference
for
application
COFs
production.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 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.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 14, 2025
Dynamic
covalent
organic
frameworks
(COFs)
represent
an
emerging
class
of
porous
materials
with
inherent
structural
flexibility.
However,
due
to
the
challenges
in
their
synthesis
and
characterization,
research
on
dynamic
COFs
remains
at
early
stage
requires
further
exploration.
Herein,
we
report
designed
a
novel
COF
entangled
2D
layers
that
exhibits
interesting
behavior
response
vapor
exposure.
By
employing
continuous
rotation
electron
diffraction
technique,
precisely
resolved
crystal
structures
before
after
adsorption.
Structural
analysis
revealed
vapor-induced
conformational
changes,
such
as
anthracene
unit
rotation,
triggered
layer
adjustments
reduced
entanglement
angles,
leading
significant
pore
structure
alterations.
This
study
not
only
introduces
new
but
also
provides
foundation
for
rational
design
flexibility
diverse
applications.
Chemistry of Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 19, 2025
Covalent
organic
frameworks
(COFs)
have
recently
demonstrated
significant
potential
for
photocatalysis.
Optimizing
the
local
electronic
environment
in
COFs
has
been
considered
to
be
critical
enhancing
photocatalytic
activity.
Here,
we
report
a
one-pot
"grafting-to"
strategy
reprogram
configurations
of
series
isoreticular
multicomponent
by
introducing
electron-donating
or
electron-withdrawing
groups
into
pores
transform
photoinert
photoactive
and
form
intramolecular
donor–acceptor
(D-A)
structures.
Such
D-A
structures
enhanced
overall
hydrogen
peroxide
photoproduction
facilitating
charge
carrier
separation
optimizing
band
achieve
oxygen
reduction
reaction
water
oxidation
simultaneously.
Notably,
one
incorporated
with
2-aminothiazole
exhibits
production
rate
3701
μmol
g–1
h–1
solar-to-chemical
conversion
efficiency
0.13%
without
use
any
sacrificial
reagents,
it
100%
bacterial
killing
rates
remarkable
>90%
biofilm
removal
capability.
This
COF
modification
strategy,
which
not
reported
before,
offers
unique
approach
constructing
highly
active
photocatalysts
containing
great
future
design
antibacterial
therapies.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 18, 2025
Near-infrared
(NIR)
light-driven
photoreactions
are
advantageous
over
visible
ones
because
NIR
photons
have
lower
energy
and
fewer
side
reactions,
deeper
penetration
in
reaction
media,
high
abundance
the
solar
spectrum.
However,
currently
available
covalent
organic
frameworks
(COFs)
absorb
UV-vis
region
catalyze
under
blue
or
white
light
irradiation.
Herein,
we
report
a
linker-to-linker
charge
transfer
process
viologen-linked
porphyrin
COF
(Vio-COF),
leading
to
novel
type
of
hyperporphyrin
effect
extending
absorption
into
with
an
edge
at
998
nm.
Under
irradiation,
photoinduced
separation
Vio-COF
generates
viologen
radical
that
efficiently
reduces
oxygen
form
superoxide
radicals
for
catalytic
oxidative
coupling
reactions.
The
proximity
units
within
framework
significantly
enhances
performance
Vio-COF,
outperforming
its
homogeneous
counterparts
aerobic
amidation
amine
was
readily
recycled
used
six
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 3, 2025
Vapor-driven
smart
materials
show
significant
advantages
in
areas
such
as
intelligent
control,
gas
detection,
and
information
transmission.
However,
their
typically
singular
response
mechanisms
pose
challenges
for
achieving
binary
behaviors
within
a
single
system.
Drawing
inspiration
from
bimetallic
strips,
dual-layer
covalent
organic
framework
(DL-COF)
membrane
is
developed
with
hierarchical
pore
structure.
This
exhibits
asymmetric
expansion
or
contraction
on
either
side
when
exposed
to
morpholine
1,4-dioxane
vapors,
enabling
behaviors.
The
driving
forces
underlying
these
responses
are
the
shifts
hydrogen
bond
equilibrium
caused
by
chain-like
bonding
swelling
effects
two
layers,
which
have
different
degrees
of
crystallinity.
structure
further
enhances
rapid
mass
transfer,
DL-COF
achieve
an
impressive
time
just
0.6
s.
By
leveraging
its
distinct
responsiveness
can
be
effectively
utilized
visual
translation
encrypted
information,
reliable
decoding
gas-encrypted
Morse
code
continuous
programmatic
vapor
inputs.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 3, 2025
Abstract
Photoresponsive
materials
have
garnered
considerable
attention,
particularly
azo‐functionalized
covalent
organic
frameworks
(COFs),
due
to
their
unique
ability
undergo
cis/trans
isomerization
under
UV/visible
light
irradiation,
making
them
highly
promising
in
the
field
of
adsorption.
In
this
work,
innovative
post‐synthetic
modification
(PSM)
approach
is
developed
introduce
azobenzene
groups,
resulting
construction
three
COFs
with
varying
degrees
azo‐functionalization
(ThTFB‐nN
=
N,
n
1,
2,
3).
It
found
that
ThTFB‐nN
N
exhibits
reversible
alternating
irradiation
365
and
450
nm
light,
degree
azo
content
within
framework,
as
well
trans
‐
cis
isomerization,
can
significantly
influence
material's
properties.
Notably,
‐ThTFB‐3N
demonstrates
highest
adsorption
capacity
for
aniline
at
303.3
mg·g
−1
,
representing
a
nearly
tenfold
enhancement
compared
(30.7
).
Additionally,
ThTFB‐3N
shows
excellent
fluorescence
detection
capability
aniline,
achieving
limit
22
ppb.
To
investigate
underlying
mechanisms
detection,
density
functional
theory
(DFT)
calculations
are
conducted.
conclusion,
work
introduces
novel
PSM
strategy
incorporating
photoresponsive
units,
leading
multifunctional
material
substantial
potential
detection.
