Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
14(5)
Published: Dec. 11, 2023
Abstract
The
development
of
efficient
photocatalysts
for
artificial
photocatalytic
energy
conversion
is
an
intriguing
strategy.
Promisingly,
conjugated
polymers
(CPs)
have
been
actively
investigated
as
alternatives
to
traditional
inorganic
semiconductors
photocatalysis
due
their
molecularly
tunable
optoelectronic
properties,
thus
providing
a
great
platform
molecular
design.
Incorporating
donor
(D)
and
acceptor
(A)
units
into
the
backbone
CPs
ensures
adequate
D−A
interface,
which
essential
facilitating
charge
separation.
This
approach
also
allows
bandgaps
leading
significant
progress
in
conversions
recent
years.
Here,
fundamentals
D–A
type
are
initially
outlined,
followed
by
advanced
experimental
methods
density
functional
theory
(DFT)
calculations
investigating
carrier
dynamics.
Then,
detailed
exposition
synthetic
strategies
carried
out.
Their
extensive
applications
diverse
energy‐related
conversions,
such
hydrogen
evolution,
oxygen
overall
water
splitting,
CO
2
reduction,
N
H
O
evolution
comprehensively
presented.
review
provides
new
comprehensive
insights
molecular‐level
design
catalysts
boosted
conversion,
expected
further
advance
photocatalysis.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: Aug. 28, 2023
Constructing
photocatalytically
active
and
stable
covalent
organic
frameworks
containing
both
oxidative
reductive
reaction
centers
remain
a
challenge.
In
this
study,
benzotrithiophene-based
with
spatially
separated
redox
are
rationally
designed
for
the
photocatalytic
production
of
hydrogen
peroxide
from
water
oxygen
without
sacrificial
agents.
The
triazine-containing
framework
demonstrates
high
selectivity
H2O2
photogeneration,
yield
rate
2111
μM
h-1
(21.11
μmol
1407
g-1
h-1)
solar-to-chemical
conversion
efficiency
0.296%.
Codirectional
charge
transfer
large
energetic
differences
between
linkages
linkers
verified
in
double
donor-acceptor
structures
periodic
frameworks.
sites
mainly
concentrated
on
electron-acceptor
fragments
near
imine
bond,
which
regulate
electron
distribution
adjacent
carbon
atoms
to
optimally
reduce
Gibbs
free
energy
O2*
OOH*
intermediates
during
formation
H2O2.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(26)
Published: April 25, 2023
Abstract
Photocatalytic
oxygen
reduction
reaction
(ORR)
offers
a
promising
hydrogen
peroxide
(H
2
O
)
synthetic
strategy,
especially
the
one‐step
two‐electron
(2e
−
ORR
route
holds
great
potential
in
achieving
highly
efficient
and
selectivity.
However,
2e
is
rarely
harvested
underlying
mechanism
for
regulating
pathways
remains
greatly
obscure.
Here,
by
loading
sulfone
units
into
covalent
organic
frameworks
(FS‐COFs),
we
present
an
photocatalyst
H
generation
via
from
pure
water
air.
Under
visible
light
irradiation,
FS‐COFs
exert
superb
yield
of
3904.2
μmol
h
−1
g
,
outperforming
most
reported
metal‐free
catalysts
under
similar
conditions.
Experimental
theoretical
investigation
reveals
that
accelerate
separation
photoinduced
electron‐hole
(e
‐h
+
pairs,
enhance
protonation
COFs,
promote
adsorption
Yeager‐type,
which
jointly
alters
process
two‐step
to
one,
thereby
with
high
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(49)
Published: Aug. 14, 2023
Abstract
Benefiting
from
the
excellent
structural
tunability,
robust
framework,
ultrahigh
porosity,
and
rich
active
sites,
covalent
organic
frameworks
(COFs)
are
widely
recognized
as
promising
photocatalysts
in
chemical
conversions,
emerged
hydrogen
peroxide
(H
2
O
)
photosynthesis
2020.
H
,
serving
an
environmental‐friendly
oxidant
a
liquid
fuel,
has
attracted
increasing
researchers
to
explore
its
potential.
Over
past
few
years,
numerous
COFs‐based
developed
with
encouraging
achievements
production,
whereas
no
comprehensive
review
articles
exist
summarize
this
specific
significant
area.
Herein
we
provide
systematic
overview
of
advances
challenges
COFs
photocatalytic
production.
We
first
introduce
priorities
photosynthesis.
Then,
various
strategies
improve
efficiency
discussed.
The
perspective
outlook
for
future
emerging
field
finally
offered.
This
timely
will
pave
way
development
highly
efficient
practical
production
value‐added
chemicals
not
limited
.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(6), P. 5206 - 5217
Published: Jan. 31, 2024
The
structure
and
electronic
state
of
the
active
center
in
a
single-atom
catalyst
undergo
noticeable
changes
during
dynamic
catalytic
process.
metal
atom
is
not
well
demonstrated
manner.
This
study
that
Li
atoms,
serving
as
centers,
can
migrate
on
C3N4
monolayer
or
between
monolayers
when
exposed
to
light
irradiation.
migration
alters
local
coordination
environment
nanosheets,
leading
significant
enhancement
photocatalytic
activity.
H2O2
process
could
be
maintained
for
35
h
with
920
mmol/g
record-high
yield,
corresponding
0.4%
concentration,
which
far
greater
than
value
(0.1%)
practical
application
wastewater
treatment.
Density
functional
theory
calculations
indicated
Li-coordinated
structures
contributed
superhigh
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(38)
Published: Aug. 1, 2023
H2
O2
is
a
significant
chemical
widely
utilized
in
the
environmental
and
industrial
fields,
with
growing
global
demand.
Without
sacrificial
agents,
simultaneous
photocatalyzed
synthesis
through
oxygen
reduction
reaction
(ORR)
water
oxidation
(WOR)
dual
channels
from
seawater
green
sustainable
but
still
challenging.
Herein,
two
novel
thiophene-containing
covalent
organic
frameworks
(TD-COF
TT-COF)
were
first
constructed
served
as
catalysts
for
via
indirect
2e-
ORR
direct
WOR
channels.
The
photocatalytic
production
performance
can
be
regulated
by
adjusting
N-heterocycle
modules
(pyridine
triazine)
COFs.
Notably,
no
just
using
air
raw
materials,
TD-COF
exhibited
high
yields
of
4060
μmol
h-1
g-1
3364
deionized
natural
seawater,
respectively.
Further
computational
mechanism
studies
revealed
that
thiophene
was
primary
photoreduction
unit
ORR,
while
benzene
ring
(linked
to
imine
bond)
central
photooxidation
WOR.
current
work
exploits
COFs
overall
provides
fresh
insight
into
creating
innovative
photocatalyzing
synthesis.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(36)
Published: July 18, 2023
Artificial
H2
O2
photosynthesis
by
covalent
organic
frameworks
(COFs)
photocatalysts
is
promising
for
wastewater
treatment.
The
effect
of
linkage
chemistry
COFs
as
functional
basis
to
photoelectrochemical
properties
and
photocatalysis
remains
a
significant
challenge.
In
this
study,
three
kinds
azoles-linked
including
thiazole-linked
TZ-COF,
oxazole-linked
OZ-COF
imidazole-linked
IZ-COF
were
successfully
synthesized.
More
accessible
channels
charge
transfer
constructed
in
TZ-COF
via
the
donor-π-acceptor
structure
between
thiazole
pyrene
linker,
leading
efficient
suppression
photoexcited
recombination.
Density
theory
calculations
support
experimental
studies,
demonstrating
that
more
favorable
formation
*O2
intermediate
production
than
oxazole
imidazole
linkages.
real
active
sites
located
at
benzene
ring
fragment
unit
azole
linkage.
Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
13(14)
Published: March 1, 2023
Abstract
H
2
O
plays
an
irreplaceable
role
in
many
aspects
of
human
society,
such
as
paper
bleaching,
medical
disinfection,
wastewater
treatment,
organic
synthesis,
hydrometallurgy
and
the
electronic
industry.
However,
unsustainability
current
industrial
production
process
traditional
anthraquinone
has
a
serious
conflict
with
green
sustainable
development.
The
photo/electrocatalytic
from
renewable
energy
advantages
being
more
economical,
low‐carbon
green,
line
requirements
economy.
These
catalytic
methods
have
played
demonstrative
development
small
molecules,
contributing
to
fundamental
understanding
general
catalysis
providing
scientific
perspective
for
future
new
cycles.
In
this
review,
authors
aim
integrate
reaction
mechanism
photocatalytic
electrocatalytic
production,
summarize
application
recent
years,
assess
modern
technologies
promoted
research,
including
flux
equipment
coproduction,
etc.
This
review
intends
provide
clear
logic
profile
directions
calls
researchers
insights
into
field.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(48)
Published: Sept. 29, 2023
Revealing
the
photocatalytic
mechanism
between
various
junctions
and
catalytic
activities
has
become
a
hotspot
in
systems.
Herein,
an
internal
molecular
heptazine/triazine
(H/T)
junction
crystalline
carbon
nitride
(HTCN)
is
constructed
devoted
to
selective
two-electron
oxygen
reduction
reaction
(2e-
ORR)
for
efficient
hydrogen
peroxide
(H2
O2
)
production.
In-situ
X-ray
diffraction
spectra
under
temperatures
authenticate
successful
formation
of
H/T
HTCN
during
calcining
process
rather
than
physically
mixing.
The
increased
surface
photovoltage
transient
signals,
decreased
exciton
binding
energy
undoubtably
elucidate
that
obvious
increasement
carrier
density
diffusion
capability
photogenerated
electrons
are
realized
over
HTCN.
Additionally,
analyses
situ
photoirradiated
Kelvin
probe
force
microscopy
femto-second
absorption
reveal
construction
strong
built-in-electric
field
existence
majority
long-lived
shallow
trapped
associated
with
HTCN,
respectively.
Benefiting
from
these,
results
exhibit
incredible
improvement
(96.5-fold)
H2
This
novel
work
provides
comprehensive
understanding
reactive
charges
strengthening
driving-force
production,
which
opens
potential
applications
enhancing
PCN-based
redox
reactions.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(12)
Published: Dec. 6, 2023
Abstract
As
a
chemical
product
with
rapidly
expanding
demand
in
the
field
of
modern
energy
and
environmental
applications,
hydrogen
peroxide
(H
2
O
)
has
garnered
widespread
attention.
However,
existing
industrial
production
H
is
plagued
by
high
consumption,
harmful
waste
emission,
severe
safety
issues,
making
it
difficult
to
satisfy
environmental/economic
concept.
Artificial
photosynthesis
offers
viable
strategy
for
green
sustainable
since
uses
sunlight
as
an
source
initiate
reaction
oxygen
water
produce
.
Among
various
photocatalysts,
covalent
organic
frameworks
(COFs),
featuring
highly
ordered
skeletons
well‐defined
active
sites,
have
emerged
promising
photocatalysts
production.
This
review
presents
nascent
burgeoning
area
photocatalytic
based
on
COFs.
First,
brief
overview
technology
provided,
followed
detailed
introduction
principles
evaluation
generation.
Subsequently,
latest
research
progress
judicious
design
COFs
expounded,
particular
emphasis
manipulating
electronic
structures
redox
sites.
Finally,
outlook
challenges
future
opportunities
proposed,
hope
stimulating
further
explorations
novel
molecular‐designed
photosynthesis.