Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 7, 2024
Due
to
the
severe
recombination
of
charge
carriers,
photocatalytic
activity
covalent
organic
frameworks
(COFs)
materials
is
limited.
Herein,
through
simple
ultrasound
and
stirring
processes,
Pd
metallene
(Pde)
successfully
combined
with
2D
COFs
form
Pde/TpPa-1-COF
(Pde/TPC)
composites.
Obviously,
a
strong
internal
electric
field
(IEF)
formed
in
Pde/TPC
hybrid
materials,
which
significantly
boosts
separation
photogenerated
charges.
In
addition,
matched
structure
two
can
also
lead
electronic
coupling
effects,
plentiful
active
sites,
shortened
carrier
migration
paths.
Thus,
own
extraordinary
ability
longer
carriers
lifetime
(3.3
ns
for
2.7
TPC),
be
proved
series
photoelectrochemical
spectroscopic
tests.
Benefiting
from
formation
IEF
structure,
8%
demonstrates
highest
H
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.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(5), P. 4539 - 4550
Published: Jan. 23, 2024
Photocatalytic
materials
are
some
of
the
most
promising
substitutes
for
antibiotics.
However,
antibacterial
efficiency
is
still
inhibited
by
rapid
recombination
photogenerated
carriers.
Herein,
we
design
a
cationic
covalent
organic
framework
(COF),
which
has
symmetrical
localized
built-in
electric
field
due
to
induced
polarization
effect
caused
electron-transfer
reaction
between
Zn-porphyrin
unit
and
guanidinium
unit.
Density
functional
theory
calculations
indicate
that
there
electrophilic/nucleophilic
region
in
COF
structure,
results
from
increased
electron
density
around
The
formed
local
can
further
inhibit
carriers
driving
transfer
under
light
irradiation,
greatly
increases
yield
reactive
oxygen
species.
This
wrapped
DSPE-PEG2000
selectively
target
lipoteichoic
acid
Gram-positive
bacteria
electrostatic
interaction,
be
used
selective
discrimination
imaging
bacteria.
Furthermore,
this
nanoparticle
rapidly
kill
including
99.75%
Staphylococcus
aureus
99.77%
Enterococcus
faecalis
at
an
abnormally
low
concentration
(2.00
ppm)
irradiation
20
min.
work
will
provide
insight
into
designing
photoresponsive
COFs
through
engineering
charge
behavior.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(23), P. 14005 - 14021
Published: Jan. 1, 2024
By
investigating
the
effects
of
electron
donor
topology
and
hetero[6]radialene
structure
on
3D
COF
photocatalytic
activity,
a
twisted
BF
was
found
to
improve
organic
pollutant
degradation
water
hydrogen
production.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(18)
Published: March 7, 2024
Abstract
Covalent
organic
frameworks
(COFs)
face
limited
processability
challenges
as
photoelectrodes
in
photoelectrochemical
water
reduction.
Herein,
sub‐10
nm
benzothiazole‐based
colloidal
conjugated
reticular
oligomers
(CROs)
are
synthesized
using
an
aqueous
nanoreactor
approach,
and
the
end‐capping
molecular
strategy
to
engineer
electron‐deficient
units
onto
periphery
of
a
CRO
nanocrystalline
lattices
(named
CROs‐Cg).
This
results
stable
processable
“electronic
inks”
for
flexible
photoelectrodes.
CRO‐BtzTp‐Cg
CRO‐TtzTp‐Cg
expand
absorption
spectrum
into
infrared
region
improve
fluorescence
lifetimes.
Heterojunction
device
engineering
is
used
develop
interlayer
heterojunction
bulk
(BHJ)
with
hole
transport
layer,
electron
main
active
layers,
CROs/CROs‐Cg
or
one‐dimensional
(1D)
electron‐donating
polymer
HP18
mixed
solution
via
spinning
coating.
The
ITO/CuI/CRO‐TtzTp‐Cg‐HP18/SnO
2
/Pt
photoelectrode
shows
photocurrent
94.9
µA
cm
‒2
at
0.4
V
versus
reversible
hydrogen
electrode
(RHE),
which
47.5
times
higher
than
that
ITO/Bulk‐TtzTp.
Density
functional
theory
calculations
show
reduced
energy
barriers
generating
adsorbed
H*
intermediates
increased
affinity
CROs‐Cg.
Mott‐Schottky
charge
density
difference
analyses
indicate
enhanced
carrier
densities
accelerated
transfer
kinetics
BHJ
devices.
study
lays
groundwork
large‐scale
production
COF
nanomembranes
structures,
offering
potential
cost‐effective,
printable
systems.
