Journal of the American Chemical Society,
Год журнала:
2020,
Номер
142(34), С. 14574 - 14587
Опубликована: Июль 28, 2020
Semiconducting
polymers
are
versatile
materials
for
solar
energy
conversion
and
have
gained
popularity
as
photocatalysts
sunlight-driven
hydrogen
production.
Organic
often
contain
residual
metal
impurities
such
palladium
(Pd)
clusters
that
formed
during
the
polymerization
reaction,
there
is
increasing
evidence
a
catalytic
role
of
in
polymer
photocatalysts.
Using
transient
operando
optical
spectroscopy
on
nanoparticles
F8BT,
P3HT,
dibenzo[b,d]thiophene
sulfone
homopolymer
P10,
we
demonstrate
how
differences
time
scale
electron
transfer
to
Pd
translate
into
evolution
activity
optima
at
different
concentrations.
For
F8BT
with
common
concentrations
>1000
ppm
(>0.1
wt
%),
find
quench
photogenerated
excitons
via
femto-nanosecond
scale,
thus
outcompeting
reductive
quenching.
We
spectroscopically
identify
reduced
our
from
microsecond
onward
show
predominant
location
long-lived
electrons
gradually
shifts
when
content
lowered.
While
low
yield
limits
P10
exhibits
substantially
higher
activity,
which
results
yields
due
more
efficient
Surprisingly,
despite
performance
reside
rather
than
particles,
even
very
high
27000
(2.7
%).
In
contrast,
already
before
typical
evolution.
This
comparison
shows
quenching
but
slow
clusters,
whereas
opposite
case
F8BT.
These
findings
suggest
development
must
target
combine
both
rapid
charge
metal-based
cocatalyst.
Advanced Materials,
Год журнала:
2020,
Номер
32(38)
Опубликована: Авг. 5, 2020
Organic
semiconductors
require
an
energetic
offset
in
order
to
photogenerate
free
charge
carriers
efficiently,
owing
their
inability
effectively
screen
charges.
This
is
vitally
important
achieve
high
power
conversion
efficiencies
organic
solar
cells.
Early
heterojunction-based
cells
were
limited
relatively
modest
(<4%)
limitations
such
as
poor
exciton
dissociation,
photon
harvesting,
and
recombination
losses.
The
development
of
the
bulk
heterojunction
(BHJ)
has
significantly
overcome
these
issues,
resulting
dramatic
improvements
photovoltaic
performance,
now
exceeding
18%
efficiencies.
Here,
design
engineering
strategies
used
develop
optimal
for
solar-cell,
photodetector,
photocatalytic
applications
are
discussed.
Additionally,
thermodynamic
driving
forces
creation
stability
presented,
along
with
underlying
photophysics
blends.
Finally,
new
opportunities
apply
knowledge
accrued
from
BHJ
generate
charges
use
promising
Journal of Materials Chemistry A,
Год журнала:
2020,
Номер
8(15), С. 6957 - 6983
Опубликована: Янв. 1, 2020
In
this
review,
a
comprehensive
summary
of
the
potential
photocatalytic
applications
realized
to
date
in
fast-growing
field
COFs
is
provided
with
aim
present
full
blueprint
for
photochemical
energy
conversion
and
reactions.
Materials Advances,
Год журнала:
2021,
Номер
3(2), С. 707 - 733
Опубликована: Ноя. 23, 2021
In
this
review,
we
discuss
the
progress
in
preparation
methods
and
diverse
applications
for
covalent
triazine
frameworks,
hypercrosslinked
polymers,
organic
conjugated
microporous
polymers.
ACS Catalysis,
Год журнала:
2020,
Номер
10(20), С. 12256 - 12283
Опубликована: Сен. 24, 2020
Photocatalytic
heterogeneous
organic
transformation
is
considered
as
an
efficient,
clean
atomic
economy,
and
low-energy
consumption
strategy
for
synthesis.
Conjugated
polymers
(CPs)-based
materials
have
recently
shown
great
potential
diverse
photocatalytic
applications
because
of
their
unique
properties,
such
structural
designability,
recyclability,
high
chemical
stability,
low
cost,
they
emerged
promising
alternatives
to
traditional
molecular
or
inorganic
photocatalyst
in
photoredox
reactions.
Immense
efforts
been
made
toward
the
construction
CPs-based
versatile
transformations.
In
this
Review,
we
aim
summarize
recent
progress
photocatalysts
transformations
including
oxidation,
reduction,
coupling,
cycloaddition
reaction.
This
Review
discusses
influence
molecular,
electronic,
channel
structure
on
light
absorption,
charge
separation,
mass
transfer
different
The
regulated
synthesis,
mechanistic
discussions,
future
challenges
systems
are
also
considered.
It
expected
that
could
not
only
deepen
comprehension
but
open
up
inspirations
feasibilities
materials.
Advanced Materials,
Год журнала:
2021,
Номер
33(26)
Опубликована: Май 24, 2021
Abstract
Recently,
great
progress
has
been
achieved
in
the
design
and
preparation
of
conjugated
organic
polymer
photocatalysts
for
hydrogen
generation.
However,
it
is
still
challenging
to
develop
an
photocatalyst
with
high
photoconversion
efficiency.
Rational
structure
holds
key
point
realize
photocatalytic
performance.
Herein,
a
series
donor–π–acceptor
(D–π–A)
copolymer
developed
using
statistical
copolymerization
by
tuning
feed
molar
ratio
pyrene
(donor)
dibenzothiophene‐S,S‐dioxide
(acceptor)
units.
It
reveals
that
activity
resulting
copolymers
significantly
dependent
on
donor
acceptor,
which
efficiently
changes
component.
When
monomer
25:75,
random
PyBS‐3
10
mg
Pt
cocatalyst
shows
evolution
rate
1.05
mmol
h
−1
under
UV/Vis
light
irradiation
ascorbic
acid
as
hole‐scavenger,
external
quantum
efficiency
29.3%
at
420
nm,
represents
state‐of‐the‐art
photocatalysts.
This
work
demonstrates
efficient
strategy
optimize
improving
catalysts.
Cell Reports Physical Science,
Год журнала:
2021,
Номер
2(3), С. 100355 - 100355
Опубликована: Фев. 24, 2021
Polymeric
carbon
nitride
(g-C3N4)-based
Z-scheme
photocatalysts
have
attracted
widespread
attention
owing
to
their
notable
light-harvesting
capability,
spatially
separated
reductive
and
oxidative
active
sites,
strong
redox
ability.
This
review
article
presents
a
panorama
of
the
latest
developments
g-C3N4-based
for
various
applications.
The
development
status
basic
working
principle
is
introduced.
After
that,
characterization
technologies
are
discussed.
Later,
series
representative
photocatalytic
applications,
including
water
splitting,
CO2
reduction,
N2
fixation,
H2O2
production
exemplified.
Finally,
this
offers
some
perspectives
on
major
challenges
opportunities
future
research
in
emerging
field.
There
little
doubt
that
advanced
nanostructured
materials
could
act
as
highly
efficient
achieve
new
breakthroughs
diverse
photocatalysis
Journal of the American Chemical Society,
Год журнала:
2021,
Номер
143(32), С. 12590 - 12599
Опубликована: Июль 22, 2021
The
generation
of
hydrogen
peroxide
(H2O2)
from
water
and
dioxygen
by
sunlight-driven
heterogeneous
photocatalysis
is
a
promising
method
for
the
artificial
photosynthesis
liquid
solar
fuel.
We
previously
found
that
resorcinol–formaldehyde
(RF)
resin
powders
prepared
high-temperature
hydrothermal
synthesis
act
as
highly
active
semiconductor
photocatalysts
H2O2
generation.
Herein,
we
report
RF
doped
with
poly(3-hexylthiophene-2,5-diyl)
(RF/P3HT)
exhibit
enhanced
photocatalytic
activities.
dispersed
P3HT
within
particles
created
charge
transfer
complexes
conduction
band
via
electron
donation,
facilitating
efficient
photogenerated
electrons
through
P3HT.
This
separation
promoted
oxidation
O2
reduction.
solar-to-chemical
conversion
efficiency
on
RF/P3HT
in
under
simulated
sunlight
irradiation
atmospheric
pressure
was
∼1.0%,
which
highest
reported
powder
catalysts
photosynthesis.
