Catalysts,
Journal Year:
2023,
Volume and Issue:
13(10), P. 1367 - 1367
Published: Oct. 13, 2023
Zinc
oxide
(ZnO)
possesses
exceptional
potential
to
be
utilized
in
water
and
wastewater
treatment
applications,
either
as
a
photocatalyst
or
membrane
incorporation.
In
the
present
study,
ZnO
nanoparticles
were
synthesized
using
precipitation
method.
The
Taguchi
approach
with
L32b
orthogonal
array
was
order
optimize
experimental
conditions
for
synthesis
of
ensure
that
relatively
smaller-sized
particles
obtained.
design
characterized
by
ten
factors,
where
nine
them
possessed
four
levels,
while
one
had
two
levels.
This
study’s
factors
type
Zn
precursor,
concentration
precipitating
agent,
agent’s
concentration,
solvent,
pH
value
temperature
used
during
synthetic
procedure,
calcination
temperature,
time
stirring
synthesis,
well
speed.
influences
those
on
selected
response
parameters
(the
average
crystallite
size,
degree
crystallinity,
energy
band
gap
(Eg),
photodegradation
constant
(k))
then
evaluated.
XRD
analysis
calculated
Eg
values
indicated
hexagonal
wurtzite
structure
only
crystalline
phase
produced
samples.
photocatalytic
efficiency
all
examined
degradation
rhodamine
B
under
UV
light
irradiation.
optimal
achieved
zinc
acetate
dihydrate
precursor
at
equal
0.3
M,
sodium
hydroxide
agent
(1.5
M),
methanol
solvent
13),
procedure
70
°C,
600
°C
90
min
time,
700
rpm
optimized
sample
based
aforementioned
thoroughly
characterized.
acquired
results
confirmed
prediction
approach,
most
enhanced
k-value
observed.
Results in Materials,
Journal Year:
2024,
Volume and Issue:
22, P. 100581 - 100581
Published: May 22, 2024
(Ni-Mn)
co-doped
ZnO
nanoparticles
were
synthesized
for
different
doping
concentrations
(1%,
2%,
and
3%)
compared
with
the
purely
nanoparticles.
Green
synthesis
route
was
followed
to
fabricate
both
pure
orange
peel
extract
used
as
reducing
agent.
The
main
objectives
of
this
research
reduce
use
toxic
chemicals
develop
an
eco-friendly
green
doped
nanoparticle
synthesis.
Additionally,
co-doping
effect
on
photocatalytic
activity
also
observed.
particles
extensively
characterized
by
X-ray
diffraction
(XRD),
Scanning
Electron
Microscopy
(SEM)
analysis,
Fourier
Transform
Infrared
spectroscopy
(FTIR),
Ultraviolet-visible
(UV-vis)
spectroscopy.
XRD
analysis
confirmed
exitance
wurtzite
structure.
No
extra
peaks
found
sample
confirming
successful
doping.
crystallite
size
decreased
after
range
varied
from
36
nm
35
increasing
concentration.
SEM
revealed
average
particle
ranging
66.42
37.52
concentration,
mostly
spherical
in
shape,
agglomeration
FTIR
data
unveiled
existence
Ni-O,
Mn-O,
Zn-O
bands
materials.
band
gap
NPs
determined
UV-Visible
which
3.30
eV
2.71
significantly
improved
increment
2%
3%
samples
degraded
almost
97%
methylene
blue
dye
at
30
minutes.
OpenNano,
Journal Year:
2024,
Volume and Issue:
16, P. 100202 - 100202
Published: March 1, 2024
The
green
fabrication
of
photocatalyst
is
an
interesting
research
topic
owing
to
the
beneficials
non-toxicity,
simplicity,
and
environmentally
friendly.
In
this
research,
we
report
biosynthesis
ZnO
by
a
hydrothermal/solvothermal
method
with
addition
leaf
extract
(using
either
water
or
ethanol
as
solvent)
Senna
siamea..
prepared
was
used
for
removal
tetracycline
(TC)
antibiotic
reactive
red
141
(RR141)
azo
dye.
complete
degradation
pollutant
achieved
under
both
UV
light
(120
min)
sunlight
(40
min).
ZnO-SV400,
solvothermally
grown
using
then
calcined
at
400
°C,
showed
promising
photoactivity
assigning
increment
photogenerated
charge
carrier
separation
capacity
high
crystallinity
sample
after
thermal
treatment.
reaction
follows
nicely
first-order
rate
constant
0.081
min−1.
result
shows
that
hydroxyl
radicals
are
key
spices
involved
in
detoxification
contaminants.
recycling
ability
about
five
cycles
reported.
structural
stability
also
confirmed.
strategy
presented
here
demonstrates
synthesis
plant
extracts
main
parameter
governing
sunlight-active
toxic
contaminants
including
organic
dyes
antibiotics
wastewater.
