Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 14, 2024
While
being
important
candidate
for
heterogeneous
photocatalyst,
conjugated
polymer
typically
exhibits
random
charge
transfers
between
the
alternating
donor
and
acceptor
units,
which
severely
limits
its
catalytic
efficiency.
Herein,
inspired
by
natural
photosystem,
concept
of
guiding
migration
to
specific
reaction
sites
is
employed
significantly
boost
photocatalytic
performance
linear
polymers
(LCPs)
with
pendant
functional
groups
via
creating
programmed
charge-transfer
channels
from
backbone
moiety.
The
benzothiadiazole,
as
revealed
in
both
situ
X-ray
photoelectron
spectroscopy
(XPS)
density
theory
(DFT)
calculations,
can
act
electron
"reservoir"
that
aggregates
electrons
at
active
sites.
Moreover,
presence
channels,
evidenced
transient
absorption
(TAS),
accelerates
transfer,
preventing
recombination
holes.
As
a
result,
this
elaborately-designed
architecture,
photogenerated
move
smoothly
towards
reduction
sites,
facilitating
O
ACS Applied Energy Materials,
Journal Year:
2024,
Volume and Issue:
7(15), P. 6360 - 6375
Published: Aug. 1, 2024
Hydrogen
peroxide
(H2O2)
generation
via
a
photocatalytic
O2
reduction
reaction
has
been
considered
an
economically
efficient
and
environmentally
friendly
synthesis
method.
However,
the
productivity
of
H2O2
production
is
restricted
because
sluggish
kinetics
fast
recombination
photoinduced
excitons.
Therefore,
superior
two-dimensional
(2D)–2D
WS2/sulfur-doped
g-C3N4
(WSCN)
hybrid
material
was
successfully
fabricated
to
address
associated
limitations
through
combination
wet
impregnation
calcination
techniques
for
production.
The
effective
anchoring
WS2
nanoplates
onto
sulfur-doped
(SCN)
nanosheets
facilitates
separation
excitons
with
sturdy
redox
properties,
which
attributable
establishment
S-scheme
heterojunctions
between
SCN
W–S
bonding
as
substantiated
by
X-ray
photoelectron
spectroscopy
(XPS)
analysis.
bond
at
interface
acts
bridge
charge
segregation
pathways.
Among
all,
2.5
WSCN
displays
exceptional
817
μmol,
7.9-
2.68-fold
higher
than
those
pristine
SCN,
respectively.
solar-to-chemical
conversion
efficiency
found
be
0.24%,
whereas
apparent
quantum
yield
estimated
3.19%
420
nm
irradiation.
improved
activity
figured
out
cathodic
photocurrent
−1.51
mA
cm–2
delayed
excitons,
supported
photoluminescence
electrochemical
impedance
measurements.
charge-transfer
pathway
well
validated
radical
scavenging
experiment
work
function,
evaluated
from
VB-XPS
analysis
in
situ
XPS
measurement.
This
research
offers
paradigmatic
idea
constructing
photocatalyst
generation.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(30), P. 11972 - 11980
Published: Jan. 1, 2024
Leveraging
the
reversible
phenazine–dihydrophenazine
interconversion
in
microporous
polymers
enhances
photocatalytic
H
2
O
generation
by
improving
reduction
and
charge
separation,
showcasing
a
new
approach
for
solar-driven
chemical
conversion.
