Abstract
In
the
midst
of
global
energy
crisis,
conversion
solar
into
chemical
or
high‐value
chemicals
has
become
critical.
Hydrogen
peroxide
(H
2
O
),
a
versatile
oxidizing
agent,
plays
an
important
role
in
synthesis,
medical
disinfection,
and
clean
generation
via
fuel
cells.
Recently,
photocatalytic
H
from
water
oxygen
using
covalent
organic
frameworks
(COFs)
metal–organic
(MOFs)
emerged
as
sustainable
approach.
this
context,
novel
dimolybdenum
paddlewheel‐embedded
COF
(Mo‐DHTA
COF)
is
presented
synthesized
for
generation.
It
observed
that
Mo
sites
help
to
bind
molecule,
while
high‐energy
valence
band
electrons
localized
on
α‐hydroquinone
moiety
facilitate
efficient
photoelectron
transfer
reduction.
Simultaneously,
reduced
electron
density
above
hydroxy
groups
conduction
serves
proton
source
during
production.
Due
these
synergistic
effects,
Mo‐DHTA
exhibited
production
rate
626
µmol
g
−1
h
aqueous
ethanol
4084
benzyl
alcohol,
which
found
be
higher
than
polymeric
counterpart
(Mo‐DHTA‐P).
This
innovative
design
highlights
potential
metal‐embedded
crystalline
porous
COFs
advanced
applications.
Journal of Materials Chemistry A,
Год журнала:
2023,
Номер
11(27), С. 14489 - 14538
Опубликована: Янв. 1, 2023
Covalent
organic
frameworks
provide
a
platform
for
the
integration
of
functional
linkers
into
ordered
yet
tunable
two-dimensional
to
yield
π–π
stacked
conjugated
materials
photocatalytic
water
splitting
hydrogen
generation.
ACS Materials Letters,
Год журнала:
2024,
Номер
6(5), С. 2007 - 2049
Опубликована: Апрель 17, 2024
Hydrogen
peroxide
(H2O2),
a
valuable
chemical,
is
widely
used
as
powerful
oxidizing
agent
in
chemical
synthesis,
pharmaceuticals,
medical
disinfection,
and
environmental
treatment
industries.
Currently,
over
95%
of
H2O2
produced
industrially
using
the
anthraquinone
process,
which
associated
with
its
high
energy
consumption
hazardous
byproducts.
Therefore,
photochemical
synthesis
from
water
oxygen
covalent
organic
framework
based
photocatalysts
have
attracted
considerable
attention.
This
review
aims
to
outline
recent
achievements,
challenges
future
prospects
COFs
heterogeneous
for
sustainable
generation.
We
summarize
chronological
development
COFs,
different
mechanisms
involved,
detailed
experiments
quantification
methods
photocatalytic
The
puts
forward
an
outlook,
highlighting
advantages
limitations
anticipate
that
this
will
provide
insight
into
current
progress
inspire
next-generation
production.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(28)
Опубликована: Апрель 29, 2024
Abstract
The
synthesis
of
covalent
organic
frameworks
(COFs)
at
bulk
scale
require
robust,
straightforward,
and
cost‐effective
techniques.
However,
the
traditional
solvothermal
synthetic
methods
COFs
suffer
low
scalability
as
well
requirement
sensitive
reaction
environment
multiday
time
(2–10
days)
which
greatly
restricts
their
practical
application.
Here,
we
report
microwave
assisted
rapid
optimized
a
donor‐acceptor
(D−A)
based
highly
crystalline
COF,
TzPm‐COF
in
second
(10
sec)
to
minute
min)
scale.
With
increasing
from
seconds
minutes
crystallinity,
porosity
morphological
changes
are
observed
for
.
Owing
visible
range
light
absorption,
suitable
band
alignment,
exciton
binding
energy
(E
b
=64.6
meV),
can
efficaciously
produce
superoxide
radical
anion
(O
2
.−
)
after
activating
molecular
oxygen
eventually
drives
aerobic
photooxidative
amidation
with
high
recyclability.
This
photocatalytic
approach
works
variety
substituted
aromatic
aldehydes
having
electron‐withdrawing
or
donating
groups
cyclic,
acyclic,
primary
secondary
amines
moderate
yield.
Furthermore,
catalytic
mechanism
was
established
by
monitoring
real‐time
progress
through
situ
diffuse
reflectance
infrared
Fourier
transform
spectroscopic
(DRIFTS)
study.
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Янв. 8, 2025
The
conversion
of
solar
energy
into
chemical
or
high-value
chemicals
has
attracted
considerable
research
interest
in
the
context
global
crisis.
Hydrogen
peroxide
(H2O2)
is
a
versatile
and
powerful
oxidizing
agent
widely
used
synthesis
medical
disinfection.
H2O2
also
serves
as
clean
source
fuel
cells,
generating
electricity
with
zero-carbon
emissions.
Recently,
sustainable
production
from
water
oxygen
using
covalent
organic
frameworks
(COFs)
photocatalysts
attention;
however,
systematic
studies
highlighting
role
linkages
determining
photocatalytic
performance
are
scarce.
Under
these
circumstances,
herein,
we
demonstrate
that
varying
imine
hydrazone
within
framework
significantly
influences
production.
COFs
high-density
linkages,
providing
optimal
docking
sites
for
oxygen,
enhance
generation
activity
(1588
μmol
g−1
h−1
pure
air),
leading
to
highly
efficient
solar-to-chemical
conversion.
This
work
systematically
investigates
effect
linkage
density
on
enhancement
hydrogen
generation,
aim
achieving
high-performance
photocatalysis.
Journal of Materials Chemistry A,
Год журнала:
2023,
Номер
11(40), С. 21470 - 21497
Опубликована: Янв. 1, 2023
Various
strategies
for
improving
the
photocatalytic
performance
of
covalent
triazine
frameworks,
including
molecular
design,
structural
regulation
and
creation
heterostructures,
are
summarized.
National Science Review,
Год журнала:
2024,
Номер
11(7)
Опубликована: Май 21, 2024
Covalent-organic
frameworks
(COFs)
with
photoinduced
donor-acceptor
(D-A)
radical
pairs
show
enhanced
photocatalytic
activity
in
principle.
However,
achieving
long-lived
charge
separation
COFs
proves
challenging
due
to
the
rapid
recombination.
Here,
we
develop
a
novel
strategy
by
combining
[6
+
4]
nodes
construct
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 9, 2024
Abstract
The
global
energy
crisis
and
environmental
concerns
are
driving
research
into
renewable
sustainable
conversion
storage
technologies.
Solar
energy,
as
an
ideal
resource,
has
significant
potential
to
contribute
the
goal
of
net‐zero
carbon
emissions
if
effectively
harnessed
converted
a
reliable
storable
form
energy.
Photocatalysts
have
convert
sunlight
chemical
carriers.
In
this
respect,
covalent
organic
frameworks
(COFs)
shown
great
promise
due
their
tunable
structure
on
different
length
scales,
high
surface
areas,
beneficial
optical
properties
such
broad
visible
light
absorption.
This
review
offers
comprehensive
overview
key
developments
in
COF‐based
photocatalysts
for
various
applications,
including
water
splitting,
hydrogen
peroxide
generation,
transformations,
dioxide
nitrogen
reduction.
underlying
mechanisms,
essential
principles
material
design,
structure‐function
relationships
COFs
photocatalytic
applications
discussed.
challenges
faced
by
also
summarized
strategies
enhance
performance
explained,
improving
crystallinity,
regulating
molecular
structures,
tailoring
linkages,
incorporating
cocatalysts.
Finally,
critical
proposed
utilization
photocatalytically
generated
chemicals
value‐added
products.
Abstract
Layered
double
hydroxides
(LDHs)
is
a
category
of
2D
materials
that
possess
excellent
physicochemical
properties
for
enhancing
photocatalytic
(PC),
electrocatalytic
(EC),
and
photoelectrochemical
(PEC)
performances.
However,
pristine
LDH
encounters
challenges
like
sluggish
charge–carrier
mobility,
high
rate
electron–hole
recombination,
low
conductivity,
tendency
to
agglomerate,
making
them
unsuitable
practical
applications.
Therefore,
modifications
such
as
composite
preparations,
co‐catalyst
integration,
semiconductor
coupling,
ternary
heterostructure
engineering
have
been
explored
disclose
new
possibilities
LDHs
in
PC,
EC,
PEC
In
the
realm
semiconducting
aimed
at
productivity,
quantum
dots
(QDs)
i.
e.,
0D
proven
be
effective
due
their
advantages,
including
abundant
reserves,
affordability,
environmental
friendliness.
This
review
explores
role
QDs
interlayer
support,
co‐catalyst,
mediator,
semiconductor,
sensitizer
QDs@LDH
heterostructures
achieve
superior
activities.
These
QD‐infused
also
deliver
improved
EC
water–splitting
performance
coupled
with
long–term
stabilities.
Additionally,
this
delves
into
characterization
techniques,
intrinsic
structural
features,
designing
QD@LDH
heterostructures.
Future
scopes
constructing
cutting–edge
theoretical
anticipations
are
discussed.
may
guiding
light
sustainable
approach
outperform
QD‐modified
versatile
catalysts.
Green Chemistry,
Год журнала:
2024,
Номер
26(18), С. 9619 - 9651
Опубликована: Янв. 1, 2024
This
review
focuses
on
advances
in
covalent
organic
framework
(COF)
photocatalysts
for
cross-coupling
reactions,
which
provide
a
greener
catalytic
route
transformations.
