A
new
kind
of
group-modified
polymeric
carbon
nitride
(PCN)
photocatalyst
was
synthetized
with
urea
and
4-Nitro-o-phenylenediamine
(NPD)
by
one-pot
method
applied
to
degrade
bisphenol
(BPA)
in
aqueous
solution.
The
light
response
range
had
been
extended
a
lot
due
conjugation
electron
withdrawing
properties
nitrobenzene.
introduction
nitrobenzene
changed
nanostructures
PCN
led
an
increased
specific
surface
area.
XPS
EPR
results
proved
that
more
sp2
N
vacancies
were
introduced
grafting
Theoretical
simulation
demonstrated
this
group
modification
on
beneficial
for
enhanced
Donor-Acceptor
(D-A)
structures
thus
promotional
charge
separation.
photocatalytic
performance
BPA
degradation
promoted
10
times
than
unmodified
PCN.
To
verify
the
universality
strategies,
we
prepared
other
two
kinds
photocatalysts
via
electron-withdrawing
strategy
their
all
improved
obviously.
RSC Advances,
Год журнала:
2024,
Номер
14(28), С. 19707 - 19717
Опубликована: Янв. 1, 2024
Biochar/g-C
3
N
4
composite
photocatalyst
was
prepared
using
ultrasonic
method.
The
conductive
biochar
acts
as
a
charge
transfer
channel,
effectively
suppressing
the
recombination
of
photo
generated
carriers
in
g-C
.
Photocatalytic
degradation
technology
has
drawn
extensive
attention
due
to
its
ability
utilize
light
energy
for
pollutant
degradation.
However,
the
generation
of
superoxide
and
hydroxyl
radicals
under
broad-spectrum
confronts
significant
challenges.
Herein,
N-GQDs/TiO2–x
was
rationally
designed
by
adjusting
oxygen
vacancies
(Ov)
densities
constructing
interfacial
charge
transfer
channels.
First,
in
situ
XRD
EPR
investigations
disclosed
that
lowering
calcination
temperature
enabled
easy
formation
rich
vacancies.
These
introduced
mid-gap
states
within
bandgap
TiO2–x,
thereby
facilitating
efficient
absorption.
Meanwhile,
increased
Ov
density
enhanced
electron
transport
facilitated
escape
TiO2–x.
Moreover,
an
channel
established
between
N-GQDs
which
effectively
promoted
photogenerated
carriers.
Because
these
structural
electronic
modifications,
both
·OH
·O2–
could
be
readily
generated
visible
near-infrared
irradiations.
Notably,
irradiation
470
nm
LEDs,
99.3%
acid
chrome
blue
K
(AcbK)
degraded
120
min.
This
work
emphasizes
vital
synergistic
role
charge-transfer
channels,
guiding
design
high-performance,
full-spectrum
photocatalysts
environmental
applications.
New Journal of Chemistry,
Год журнала:
2023,
Номер
47(34), С. 16235 - 16244
Опубликована: Янв. 1, 2023
The
formation
schematic
is
representative
of
the
CN/O-doped
ZIS
composite.
First,
pure
g-C
3
N
4
powder
was
prepared
by
directly
calcining
melamine
in
a
muffle
furnace.
Then
composites
were
via
hydrothermal
method.
Materials Chemistry Frontiers,
Год журнала:
2024,
Номер
8(23), С. 3859 - 3876
Опубликована: Янв. 1, 2024
This
review
mainly
summarises
the
progress
in
preparation
methods
of
organic
compound/g-C
3
N
4
.
Various
materials
such
as
different
types
composites
and
their
related
energy
environmental
applications
are
discussed.
CuFe2O4
particles
were
synthesized
using
the
sol-gel
self-combustion
method
and
characterized
for
their
compositional
surface
morphology
crystal
structure.
In
comparison
to
photo-Fenton
system
without
ascorbic
acid
(AA),
presence
of
AA
resulted
in
significantly
enhanced
catalytic
degradation
phenol
CuFe2O4.
The
highest
efficiency
was
achieved
at
an
concentration
1
mM/L,
resulting
up
99.4%
elimination
just
40
min.
reaction
rate
found
be
31.7
times
higher
than
that
AA.
mechanism
enhancement
further
investigated.
Two
key
factors
contribute
enhancing
introduction
system.
First,
promoted
Cu/Fe
redox
cycle
on
catalyst
surface,
leading
a
more
efficient
generation
reactive
species
which
are
responsible
degradation.
Second,
accelerated
leaching
metal
ions
from
assisting
homogenous
Fenton
effect.
bimetallic
offers
new
perspectives
effective
design
crucial
insights
reductant-enhanced
activation.
A
new
kind
of
group-modified
polymeric
carbon
nitride
(PCN)
photocatalyst
was
synthetized
with
urea
and
4-Nitro-o-phenylenediamine
(NPD)
by
one-pot
method
applied
to
degrade
bisphenol
(BPA)
in
aqueous
solution.
The
light
response
range
had
been
extended
a
lot
due
conjugation
electron
withdrawing
properties
nitrobenzene.
introduction
nitrobenzene
changed
nanostructures
PCN
led
an
increased
specific
surface
area.
XPS
EPR
results
proved
that
more
sp2
N
vacancies
were
introduced
grafting
Theoretical
simulation
demonstrated
this
group
modification
on
beneficial
for
enhanced
Donor-Acceptor
(D-A)
structures
thus
promotional
charge
separation.
photocatalytic
performance
BPA
degradation
promoted
10
times
than
unmodified
PCN.
To
verify
the
universality
strategies,
we
prepared
other
two
kinds
photocatalysts
via
electron-withdrawing
strategy
their
all
improved
obviously.
