Nanomaterials,
Journal Year:
2025,
Volume and Issue:
15(6), P. 466 - 466
Published: March 19, 2025
The
introduction
of
nitrogen
defects
in
graphitic
carbon
nitride
(g-C3N4)
has
the
important
effect
improving
its
photocatalytic
performance.
This
study
employs
a
simple
and
environmentally
friendly
one-step
pyrolysis
method,
successfully
preparing
g-C3N4
materials
with
adjustable
N3C
defect
concentrations
through
calcination
urea
ammonium
acetate
mixture.
By
introducing
adjusting
band
structure,
conduction
was
shifted
downward
by
0.12
V,
overcoming
traditional
application
limitations
enabling
an
innovative
transition
from
enhanced
oxidation
to
reduction
capabilities.
significantly
adsorption
activation
O2.
Characterization
results
showed
that
increased
specific
surface
area
44.07
m2/g
87.08
m2/g,
enriching
reactive
sites,
while
narrowing
bandgap
2.41
eV
visible
light
absorption
capacity.
activity,
achieving
peak
performance
54.8%
for
tetracycline
(TC),
approximately
1.5
times
original
g-C3N4,
only
5.4%
(49.4%)
decrease
efficiency
after
four
cycles
testing.
demonstrates
enhances
expanding
potential
applications
environmental
remediation.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 2, 2025
Abstract
Photocatalytic
conversion
of
CO
2
and
H
O
into
high‐value‐added
C2
fuels
remains
a
tough
challenge,
mainly
due
to
the
insufficient
concentration
photogenerated
electrons
for
instability
C1
intermediates,
which
often
tend
desorb
easily
disable
form
C─C
bonds.
In
this
work,
photoreduction
‐to‐C
6
is
successfully
achieved
by
introducing
adjacent
C,
N
dual‐vacancy
sites
within
heptazine
rings
ultrathin
g‐C
3
4
,
results
in
opening
two
neighboring
forms
distinctive
dipole‐limited
domain
field
(DLDF)
structure.
situ
X‐ray
photoelectron
spectra
fourier
transform
infrared
provide
direct
evidence
rapid
accumulation
transformation
especially
*
CHO
DLDF.
Ab
initio
molecular
dynamics
further
substantiates
role
DLDF
promoting
C–C
coupling
between
through
analysis
interaction
trajectories
energy
changes
their
central
atoms,
ultimately
achieving
high
yield
C
up
57.86
µmol
g
−1
h
.
It
first
time
propose
concept
significant
advancement
‐to‐C2
fuel
with
evident
breakthrough
address
challenge
carbon‐containing
intermediates
active
sites,
offering
new
insights
design
single‐component
photocatalysts.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 3, 2025
Abstract
Electrocatalytic
nitrate
reduction
to
ammonia
(NRA)
offers
an
arousing
route
for
converting
widespread
pollutant
under
mild
conditions.
Among
other
NRA
catalysts,
single‐atom
catalyst
(SAC)
has
emerged
as
a
promising
candidate
due
its
numerous
advantages
such
maximum
metal‐atom‐utilization
efficiency,
homogeneous
and
tailorable
active
sites,
which
still
encounters
formidable
challenge
accelerate
the
kinetics
simultaneously
suppress
competitive
hydrogen
evolution
reaction,
especially
when
operated
in
electrolytes
with
low
concentration
nitrate.
Herein,
general
strategy
is
reported
prepare
defect‐enriched
coordination
polymer
catalysts
featuring
well‐defined
unsaturated
metal
can
exhibit
exceptional
performance
even
at
surpass
SACs
toward
catalysis.
Taking
cobalt
(Co)
example,
Co‐based
polymers
(d‐CoCP)
counterpart
CoCP
without
defects
are
investigated
proof‐of‐concept
study.
Both
experimental
theoretical
results
elucidate
that
elaborately‐engineered
d‐CoCP
markedly
decrease
thermodynamic
barrier
reducing
*NO
*HNO
rate‐limiting
step
along
pathway,
thus
accelerating
adsorption
of
promoting
kinetics.
Small,
Journal Year:
2024,
Volume and Issue:
20(45)
Published: July 27, 2024
Abstract
Modulating
the
electronic
properties
of
transition
metal
sites
in
photocatalysts
at
atomic
level
is
essential
for
achieving
high‐activity
carbon
dioxide
photoreduction
(CO
2
PR).
An
strategy
herein
proposed
to
engineer
In‐d‐band
center
InVO
4
by
incorporating
MnO
x
nanoparticles
and
oxygen
vacancies
(V
O
)
into
holey
nanobelts
(MnO
/V
‐InVO
),
which
synergistically
modulates
a
moderate
consequently
leads
high‐efficiency
CO
PR.
The
catalyst
with
optimized
property
exhibits
single
evolution
rate
up
145.3
µmol
g
−1
h
monoxide
(CO)
product
selectivity
92.6%,
coming
out
front
reported
‐based
materials.
It
discovered
that
modulated
favors
interaction
between
In
their
intermediates,
thereby
improves
thermodynamics
kinetics
PR‐to‐CO
reaction.
This
work
not
only
demonstrates
effective
engineering
d
orbital
low‐coordination
atoms
promote
PR,
but
also
paves
way
application
tuning
d‐band
develop
catalysts.