Catalysts,
Год журнала:
2024,
Номер
14(12), С. 883 - 883
Опубликована: Дек. 3, 2024
Coupling
TiO2
with
various
elements
could
enhance
its
photocatalytic
activity.
In
this
study,
an
innovative
ultrasound-assisted
sol–gel
method
was
used
to
synthesize
TiO2/Ag(x%)
by
varying
Ag–support
mass
(x
=
9.3,
17.1,
and
23.6%),
followed
calcination
at
450
°C
for
30
min.
The
aim
demonstrate
that
Ag
compositing
improves
photoactivity
under
visible
light
(>400
nm).
synthesized
photocatalysts
were
assessed
their
effectiveness
in
the
degradation
mineralization
of
Methylene
Blue
(MB)
Acid
Orange
7
(AO7)
using
lamps
emitting
range
400–800
nm.
Characterization
prepared
performed
Raman
spectroscopy,
SEM/EDS,
pHpzc,
UV–visible
spectroscopy.
spectroscopy
confirmed
predominance
anatase
phase
all
photocatalysts.
photodegradation
efficiencies
selected
dyes,
MB
AO7,
reached
99%
(pH
6)
95%
3)
after
180
min
irradiation,
respectively.
best
performance
two
dyes
observed
TiO2/Ag9.3%,
showing
optimal
kinetics
doping
concentration.
improved
TiO2/Ag
composite
is
due
a
decrease
recombination
rate
electron/hole
(e−/h+)
band
gap
from
3.13
2.49
eV.
both
about
9.3%,
indicating
presence
refractory
by-products
resist
complete
degradation.
Under
UVA
obtained.
This
study
confirms
potential
as
high-performance
cost-effective
photocatalyst
solar
environmental
remediation,
highlighting
role
silver
extending
absorption
into
region
improving
charge
separation.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2023,
Номер
11(32), С. 11978 - 11990
Опубликована: Авг. 2, 2023
The
enhancement
of
efficient,
visible-light
active
photoanodes
is
vital
for
advancing
photoelectrochemical
(PEC)
water
splitting
as
a
sustainable
and
environmentally
friendly
energy
alternative.
In
this
study,
we
explore
the
potential
WO3/CuWO4/Ag
heterojunction
thin
films
fabricated
by
magnetron
sputtering
on
n-Si
substrates
viable
photoanodes.
synergetic
effects
formation
Ag
nanoparticle
dispersion
contribute
to
superior
absorption,
charge
transfer,
separation
efficiency.
influence
decoration
achieved
through
solid-state
dewetting
phenomena
was
studied
in
terms
structural
microstructural
changes
responses.
Surface
topography
observations
revealed
that
film
exhibited
highest
surface
area
ratio
22.7%,
approximately
threefold
increase
compared
pure
WO3
films.
photoluminescence
(PL)
time-resolved
(TRPL)
results
demonstrated
configuration
promotes
effective
an
increased
carrier
lifetime
∼20.1
ns.
PEC
analysis
showed
substantial
photocurrent
density
1.53
mA
cm–2
(1.0
V
vs
Ag/AgCl),
2.32
times
greater
than
WO3,
applied
bias
photon-to-current
efficiency
(ABPE)
0.91%,
0.43%
0.50%
WO3/CuWO4
Moreover,
photoanode
remarkable
long-term
stability
with
current
0.21
about
4.5
h.
These
findings
underscore
photocatalysts
emphasize
significance
effect
structure
achieving
clean
hydrogen
production.
Additionally,
research
may
inspire
further
studies
plasmon
metal
controlled
size
shape,
using
simple
technique
development
efficient
electrodes
next-generation
applications.
