ACS Applied Energy Materials,
Год журнала:
2024,
Номер
7(20), С. 9402 - 9413
Опубликована: Окт. 11, 2024
Polymeric
carbon
nitride
(PCN)
and
PCN-ZnO
nanocomposites
are
promising
candidates
for
catalysis,
particularly
hydrogen
evolution
reactions
(HER).
However,
their
catalytic
efficiency
requires
enhancement
to
fully
realize
potential.
This
study
aims
improve
the
HER
performance
of
PCN
by
synthesizing
using
melamine
as
a
precursor.
Two
synthesis
methods
were
employed:
thermal
condensation
(Method
1)
liquid
exfoliation
2).
Method
1
resulted
in
composite
with
2.44
eV
energy
gap
reduced
particle
size,
significantly
enhanced
bifunctional
electrocatalyst
simultaneous
oxygen
production.
In
contrast,
2
produced
nanocomposite
an
surface
area
minor
alteration
band
gap.
alkaline
electrolytes,
ACS Omega,
Год журнала:
2024,
Номер
9(14), С. 16187 - 16195
Опубликована: Март 26, 2024
Methylene
blue
(MB)
is
a
toxic
contaminant
present
in
wastewater.
Here,
we
prepared
various
composites
of
graphene
oxide
(GO)
with
graphitic
carbon
nitride
(g-C3N4)
and
zinc
(ZnO)
for
the
degradation
MB.
In
comparison
to
ZnO
(22.9%)
g-C3N4/ZnO
(76.0%),
ternary
GO/g-C3N4/ZnO
showed
90%
photocatalytic
MB
under
light
source
after
60
min.
The
experimental
setup
parameters
were
varied
examine
process
effectiveness
degradation.
Based
on
results
experiments,
proposed
that
explains
roles
GO,
ZnO,
g-C3N4
improving
efficacy
newly
was
explored.
Notably,
nanocomposite's
surface
uniformly
covered
nanorods.
images
samples
clearly
demonstrated
porous
nature
photocatalysts,
even
being
mixed
composite
retained
layered
structure
original
material.
catalyst's
plausibly
enhanced
contaminants.
high-clarity
production
synthesis
protocol
later
validated
by
absence
any
trace
contamination
energy-dispersive
X-ray
spectroscopy
(EDS)
results.
composition
elements
their
spectra
revealed
EDS
nanorods,
g-C3N4/ZnO,
GO/g-C3N4/ZnO.
outcomes
indicated
nanocomposites
highly
uncontaminated
contained
all
necessary
facilitate
transformative
process.
this
experiment
could
be
applied
at
large
scale,
thus
proving
photocatalysts
removal
dyes.
Catalysis Today,
Год журнала:
2024,
Номер
432, С. 114578 - 114578
Опубликована: Фев. 12, 2024
The
search
for
a
fast
and
efficient
process
to
treat
water
contaminated
with
pharmaceutical
substances
is
ongoing
societally
required
due
the
impact
on
environment
human
health.
In
this
work,
photoelectrocatalytic
(PEC)
system,
coupling
visible-light
photocatalysis
electrocatalysis
suspended
immobilised
graphitic
carbon
nitride
(g-C3N4),
has
been
proved
as
feasible
alternative
simultaneous
degradation
of
model
persistent
drug,
viz.
diclofenac
(DCF),
production
hydrogen
peroxide
(H2O2).
A
comprehensive
study
variables
influencing
PEC
(visible-light
emitting
diode
radiation
g-C3N4
load)
conducted.
Moreover,
optimisation
was
accomplished
through
Central
Composite
Face-Centred
design
experiments,
focusing
load,
immersed
electrode
area,
applied
current
intensity
key
variables.
From
CCFC
design,
determined
optimal
working
conditions
were
0.76
g/L
g-C3N4,
an
area
6.38
cm2
58
mA
intensity,
leading
92%
DCF
removal
0.3
mM
produced
H2O2
in
short
period
(5
min),
which
experimentally
validated
(deviation
lower
than
1%).
To
overcome
drawbacks
operating
catalyst
powder,
synthesis
novel
material
(g-C3N4@PAN)
by
electrospinning
carried
out
using
polyacrylonitrile
(PAN)
precursors
generate
nanofibres.
Characterisation
techniques
(Scanning
Electron
Microscopy,
Diffuse
Reflectance
Fourier-Transform
Infrared
spectroscopy,
N2
adsorption-desorption
isotherms)
nanofibres
allowed
confirming
proper
immobilisation
assessing
that
route
straightforward
enables
obtaining
physicochemical
properties
similar
those
itself.
catalytic
activity
reusability
g-C3N4@PAN
up
5
cycles
batch
without
losing
efficiency,
then
confirmed
system
under
continuous
flow
mode.
All
results
remark
great
potential
developed
structure
supported
work
efficiently
different
modes
operation.
International Journal of Environmental Science and Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 9, 2025
Abstract
In
this
study,
the
removal
efficiency
of
OTC
antibiotics
from
pharmaceutical
wastewater
streams
was
evaluated
by
electrooxidation
(EO)
and
electrocatalytic
oxidation
(ECO)
methods
under
different
parameters.
catalytic
studies,
activated
carbon
supported
TiO
2
/AC
catalyst
successfully
synthesized
for
sol–gel
method.
These
catalysts
were
characterized
various
analytical
such
as
XRD,
TEM,
SEM,
DSC
BET.
The
intermediate
products
formed
in
electrochemical
degradation
antibiotic
determined
high-resolution
mass
spectrometry
analysis.
UV/Vis
spectrophotometry
cyclic
voltammetry
analyses
also
performed
to
determine
concentration
properties
electroactive
components
present
solution.
experimental
set
design,
optimum
conditions
EO
studies
15
V
voltage,
0.5
g/L
salt
amount,
7
pH
value,
36
mg/L
initial
45
min
contact
time,
while
ECO
experiments,
these
10
0.25
30
time.
According
results
79%
86%
achieved
on
simulated
effluent,
respectively.
show
that
contribute
more
efficient
molecules
accelerating
reactions
offer
a
potential
solution
pollutants.
It
found
an
design
based
CCD-RSM
optimization
model
could
be
important
consideration
better
understanding,
optimizing
increasing
process.
Graphic
abstract
