Nanomaterials,
Journal Year:
2024,
Volume and Issue:
14(9), P. 780 - 780
Published: April 30, 2024
The
photocatalytic
nitrogen
reduction
reaction
(NRR)
in
aqueous
solution
is
a
green
and
sustainable
strategy
for
ammonia
production.
Nonetheless,
the
efficiency
of
process
still
has
wide
gap
compared
to
that
Haber–Bosch
one
due
difficulty
N2
activation
quick
recombination
photo-generated
carriers.
Herein,
core-shell
Bi@Bi2MoO6
microsphere
through
constructing
Schottky
junctions
been
explored
as
robust
photocatalyst
toward
NH3.
Metal
Bi
self-reduced
onto
Bi2MoO6
not
only
spurs
electron
hole
separation
owing
junction
at
interface
but
also
promotes
adsorption
active
sites
synchronously.
As
result,
yield
N2-to-ammonia
conversion
reaches
up
173.40
μmol
g−1
on
photocatalysts,
much
two
times
bare
Bi2MoO6.
This
work
provides
new
design
decarbonization
by
utilization
renewable
energy
sources.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(8), P. 5779 - 5787
Published: April 1, 2024
Photocatalytic
dinitrogen
(N2)
fixation
is
regarded
as
an
achievable
technology
for
ammonia
(NH3)
production.
However,
the
poor
separation
efficiency
of
photoinduced
carriers
and
ineffective
N2
activation
remain
grand
obstacles
to
high-performance
NH3
photosynthesis.
Designing
advanced
heterostructured
systems
accelerate
charge
activate
molecule
a
feasible
strategy
optimize
photocatalytic
activity.
Herein,
direct
Z-scheme
configuration
established
between
BiOBr
Bi4O5Br2
through
facile
one-step
solvothermal
reaction.
This
enables
effective
spatial
electron–hole
pairs
preserves
robust
redox
ability
carriers,
concurrently
promoting
N≡N
bond
diminishing
energy
barrier
rate-determining
step.
The
formation
BiOBr/Bi4O5Br2
heterojunctions
mostly
attributed
similarities
in
their
lattice
structures
crystal
growth
conditions.
As
result,
heterojunction
exhibits
high
yield
66.87
μmol
g–1
h–1
without
using
sacrificing
reagents,
surpassing
that
pristine
by
approximately
3.3
5.6
times,
respectively.
study
provides
approach
construct
implementing
under
mild
Scientific Reports,
Journal Year:
2023,
Volume and Issue:
13(1)
Published: Nov. 7, 2023
Abstract
From
the
perspective
of
environmental
protection,
highly
efficient
degradation
antibiotics
and
organic
dyes
in
wastewater
needs
to
be
tackled
as
soon
possible.
In
this
study,
an
ecofriendly
green
cube-shaped
cobalt-doped
zinc
oxide
nanoparticles
(Co–ZnO
NPs)
photocatalyst
using
Pterocladia
Capillacea
(P.
Capillacea)
water
extract
loaded
with
5,
10,
15%
cobalt
ions
were
formed
via
co-precipitation
process
degrade
antibiotics.
The
prepared
Co–ZnO
NPs
tested
a
for
photodegradation
ciprofloxacin
(CIPF)
presence
visible
LED-light
source.
have
been
obtained
through
method
P.
capping
agent
reducing
agent,
first
time.
Several
characterization
techniques
including
FTIR,
XRD,
BET,
XPS,
TEM,
EDX,
SEM,
TGA
DRS
UV–Vis
spectroscopy
applied
study
NPs.
XRD
results
suggested
that
average
size
these
ranged
between
42.82
46.02
nm
hexagonal
wurtzite
structure.
Tauc
plot
shows
optical
energy
bandgap
ZnO
(3.19
eV)
gradually
decreases
2.92
eV
by
Co
doping.
Examinations
showed
5%
was
highest
catalyst
CIPF
when
compared
other
10
A
mg/L
solution
photo-degraded
(100%)
within
15
min
irradiation.
kinetics
first-order
model
is
suitable
displaying
rate
reaction
amount
elimination
R
2
=
0.952.
Moreover,
central
composite
design
optimization
Co-doped
also
investigated.
