Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 16, 2025
Abstract
Graphite
phase
carbon
nitride
(CN)
emerges
as
a
promising
catalyst
for
sunlight‐driven
H
2
O
synthesis
owing
to
its
merits
of
stable
physicochemical
properties,
distinctive
electronic
structure,
adjustable
bandgap,
etc.,
yet
poor
charge
behavior,
especially
high
carrier
recombination
and
low
migration
rate,
limit
photocatalytic
activity.
Herein,
molecularly
tunable
donor‐acceptor
(D‐A)
integrated
CN
is
fabricated
via
cytosine
doping
combined
with
molten
salt‐assisted
calcination.
The
utilized
achieves
the
highest
H₂O₂
yield
8.07
mmol
g
−1
h
,
which
exceeds
initial
by
factor
40.4,
surpassing
numerous
reported
CN‐based
photocatalysts.
Series
characterizations/tests
(e.g.,
transient
absorption,
steady‐state
SPV
spectra,
KPFM)
theoretical
calculations
HOMO/LUMO,
adsorption
energy)
confirm
that
incorporation
K
+
‐C≡N
pyrimidine
ring
disrupts
symmetry
establishes
D‐A
significantly
augmenting
separation
photogenerated
charges.
capture
experiment
rotating
disk
electrode
test
affirm
two‐step
single
electron
oxygen
reduction
pathway
occurs
in
process
synthesis.
This
work
offers
novel
approaches
profound
revelations
development
Chemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
482, P. 149090 - 149090
Published: Jan. 26, 2024
In
this
research,
an
enhanced
visible
light
response
of
oxygen
and
phosphorus-doped
porous
g-C3N4
(HAPA-CN)
was
prepared
by
thermo-polymerization
urea,
hydroxyacetic
acid
phytic
acid.
Its
internal
structure
verified
solid-state
nuclear
magnetism
(NMR)
secondary
ion
mass
spectrometry
(SIMS).
The
surface
electron
density
on
HAPA-CN
the
inclusion
phosphorus.
boosted
photocatalytic
activity
attributed
to
high
spectral
utilization
sunlight
meliorated
charge
separation
efficiency.
experimental
results
showed
that
0.05
HAPA-CN/persulfate
(PS)
system
exhibited
a
higher
efficiency
in
photodegradation
process
bisphenol
A
(BPA)
2-mercaptobenzothiazole
(MBT).
Compared
with
ordinary
g-C3N4,
integration
photocatalysis
persulfate
oxidation
led
increase
removal
BPA
MBT
pollutants,
which
increased
68.11
11.18
times,
respectively.
also
certain
under
long-wavelength
irradiation
such
as
blue,
green,
red
light.
conversion
sodium
lignosulfonate
(SL),
HAPA-CN/PS
achieved
maximum
yield
134.34
mg/gSL
vanillic
at
30
min,
significantly
better
than
g-C3N4.
Synergistic
gas
production
(H2,
CO,
CH4,
C2H4,
C2H6)
enhanced.
Combined
theoretical
calculations,
mechanism
analyzed.
This
work
provides
new
insights
for
exploring
photocatalyst
combine
structure,
phosphorus
co-doping
PS
activation
technology
organic
pollutants
lignin
valorization.
