Langmuir,
Journal Year:
2024,
Volume and Issue:
40(26), P. 13331 - 13338
Published: June 14, 2024
Molecular
doping
is
an
innovative
approach
to
modify
the
electronic
configuration
of
carbon
nitride
(CN)
photocatalysts,
enhancing
visible
light
absorption
and
optimizing
recombination
electron–hole
pairs
in
photocatalytic
H2
generation.
Unlike
conventional
heteroatom
incorporation
strategy,
molecular
offers
a
more
effective
means
structure
optimization
conjugated
framework.
This
Perspective
studies
recent
advancements
benzene-ring
for
CN,
emphasizing
correlation
between
activity.
The
advantages
disadvantages
CN
are
thoroughly
demonstrated,
underscoring
importance
utilizing
fine-tune
both
physical
structures
enhanced
efficacy.
Insights
provided
on
strategies
address
limitations
explore
new
prospects
field
methodologies.
Small,
Journal Year:
2024,
Volume and Issue:
20(30)
Published: Feb. 23, 2024
Abstract
Converting
carbon
dioxide
(CO
2
)
into
high‐value
chemicals
using
solar
energy
remains
a
formidable
challenge.
In
this
study,
the
CSC@PM6:IDT6CN‐M:IDT8CN‐M
non‐fullerene
small‐molecule
organic
semiconductor
is
designed
with
highly
efficient
electron
donor‐acceptor
(D‐A)
interface
for
photocatalytic
reduction
of
CO
.
Atomic
Force
Microscope
and
Transmission
Electron
images
confirmed
formation
an
interpenetrating
fibrillar
network
after
combination
donor
acceptor.
The
yield
from
reached
1346
µmol
g
−1
h
,
surpassing
those
numerous
reported
inorganic
photocatalysts.
D‐A
structure
effectively
facilitated
charge
separation
to
enable
electrons
transfer
PM6
IDT6CN‐M:IDT8CN‐M.
Meanwhile,
attributing
dipole
moments
strong
intermolecular
interactions
between
IDT6CN‐M
IDT8CN‐M,
forces
are
enhanced,
laminar
stacking
π‐π
strengthened,
thereby
reinforcing
acceptor
molecules
significantly
enhanced
separation.
Moreover,
internal
electric
field
in
excited
state
lifetime
PM6:IDT6CN‐M:IDT8CN‐M.
situ
diffuse
reflectance
infrared
Fourier
transform
spectroscopy
(DRIFTS)
analysis
demonstrated
that
carboxylate
(COOH*)
predominant
intermediate
during
reduction,
possible
pathways
deduced.
This
study
presents
novel
approach
designing
materials
achieve
high
activity.
Small,
Journal Year:
2024,
Volume and Issue:
20(31)
Published: March 10, 2024
Abstract
The
photocatalytic
environmental
decontamination
ability
of
carbon
nitride
(g‐C
3
N
4
,
CN)
typically
suffers
from
their
inherent
structural
defects,
causing
rapid
recombination
photogenerated
carriers.
Conjugating
CN
with
tailored
donor–acceptor
(D–A)
units
to
counteract
this
problem
through
electronic
restructuring
becomes
a
feasible
strategy,
where
confirmation
by
density
functional
theory
(DFT)
calculations
indispensable.
Herein,
DFT
is
employed
predirect
the
copolymerization
modification
benzene
derivatives,
screening
benzaldehyde
as
optimal
electron‐donating
candidate
for
construction
reoriented
intramolecular
charge
transfer
path.
Experimental
characterization
and
testing
corroborate
formation
narrowed
bandgap
well
high
photoinduced
carrier
separation.
Consequently,
BzCN‐2
exhibited
superior
capacity
in
application
tetracycline
hydrochloride
degradation,
3.73
times
higher
than
that
CN.
Besides,
BzCN‐2‐based
system
determined
have
toxicity‐mitigating
effect
on
TC
removal
via
T.E.S.T
prefers
dissociable
2−
species
under
partial
alkalinity.
This
work
provides
insight
into
guidance
design
D–A
conjugated
polymer
its
scenarios
decontamination.
Langmuir,
Journal Year:
2024,
Volume and Issue:
40(3), P. 1848 - 1857
Published: Jan. 6, 2024
Elaborating
the
specific
reactive
oxygen
species
(ROS)
involved
in
photocatalytic
degradation
of
atrazine
(ATZ)
is
great
significance
for
elucidating
underlying
mechanism.
This
study
provided
conclusive
evidence
that
hydroxyl
radicals
(·OH)
were
primary
ROS
responsible
efficient
ATZ,
thereby
questioning
reliability
widely
adopted
radical
quenching
techniques
discerning
authentic
species.
As
an
illustration,
oxygen-modified
g-C3N4
(OCN)
was
prepared
to
counteract
limitations
pristine
(CN).
Comparative
assessments
between
CN
and
OCN
revealed
a
remarkable
10.44-fold
improvement
ATZ
by
OCN.
enhancement
ascribed
increased
content
C–O
functional
groups
on
surface
OCN,
which
facilitated
conversion
superoxide
(·O2–)
into
hydrogen
peroxide
(H2O2),
subsequently
leading
generation
·OH.
The
production
·OH
contributed
dealkylation,
dechlorination,
hydroxylation
ATZ.
Furthermore,
toxicity
significant
reduction
following
its
sheds
light
intricate
interconversion
offers
valuable
mechanistic
insights
Langmuir,
Journal Year:
2024,
Volume and Issue:
40(26), P. 13331 - 13338
Published: June 14, 2024
Molecular
doping
is
an
innovative
approach
to
modify
the
electronic
configuration
of
carbon
nitride
(CN)
photocatalysts,
enhancing
visible
light
absorption
and
optimizing
recombination
electron–hole
pairs
in
photocatalytic
H2
generation.
Unlike
conventional
heteroatom
incorporation
strategy,
molecular
offers
a
more
effective
means
structure
optimization
conjugated
framework.
This
Perspective
studies
recent
advancements
benzene-ring
for
CN,
emphasizing
correlation
between
activity.
The
advantages
disadvantages
CN
are
thoroughly
demonstrated,
underscoring
importance
utilizing
fine-tune
both
physical
structures
enhanced
efficacy.
Insights
provided
on
strategies
address
limitations
explore
new
prospects
field
methodologies.
