Journal of Materials Research and Technology,
Год журнала:
2021,
Номер
15, С. 6098 - 6112
Опубликована: Ноя. 1, 2021
Gold
(Au)
and
zinc
oxide
(ZnO)
nanoparticles
decorating
reduced
graphene
(RGO)
was
designed
by
hydrothermal
method
using
the
agent
of
1,8
diamino,
3,
6
dioxaoctan
(DDO).
This
novel
DDO
with
triple
function:
reducing
agent,
capping
alkaline
lead
to
decoration
Au
ZnO
on
RGO.
Ternary
nanohybrid
Au/ZnO/RGO
are
probed
as
photocatalysts
for
comparative
photo-degradation
study.
The
pollutant
model
Rhodamine
B
different
concentrations
pH
in
presence
diverse
dosages
nanohybrids
tested
terms
photocatalyst
degradation.
Further,
delivered
a
good
efficiency
95.05%
at
11
dye
concentration
10
ppm
0.06
g
under
visible
light.
retention
over
7
runs
85.80%.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Янв. 23, 2024
Abstract
The
green
synthesis
method
which
is
aligned
with
the
sustainable
development
goals
(SDGs)
theory,
proposed
to
synthesize
ZnO
nanoparticles
using
ginger
extract
treat
acidic
wastewater
and
factory
effluent
as
a
current
challenge
effects
of
concentration
extracts
on
synthesized
nanostructures
are
investigated.
results
declare
that
single-phase
hexagonal
formed
less
than
25
mL
crystallite
size
NPs
increased
increasing
extract.
Also,
significant
morphology
(nanocone,
nanoflakes,
flower-like)
particle
demonstrated.
low
leads
formation
while
flower-like
structure
gradually
completed
by
Furthermore,
changes
in
specific
surface
area
(SSA)
samples
observed
(in
range
6.1–27.7
m
2
/g)
variation
best
SSA
related
10
strong
effect
reflectance
spectra
NPs,
especially
UV
region
proved.
indirect
(direct)
band
gap
energies
obtained
3.09–3.20
eV
(3.32–3.38
eV).
photocatalytic
activities
for
degradation
methylene
blue
indicate
impressive
efficiency
it
reaches
up
44%
83%
prepared
5
pH
4.3
5.6,
respectively.
This
study
provided
new
insights
into
fabrication
practical
application
high-performance
photocatalysts
degrading
organic
pollutants
an
solution.
Applied Water Science,
Год журнала:
2021,
Номер
11(2)
Опубликована: Фев. 1, 2021
Abstract
Nanotechnology
is
a
recent
field
of
modern
research
dealing
with
synthesis,
strategy
and
manipulation
particle’s
structure
in
size
range
1–100
nm.
This
study
introduces
one
the
methods
synthesis
nanoparticles,
i.e.,
green
ZnO
NPs
using
aqueous
leaf
extract
Becium
grandiflorum
(AM:
‘Yedegamentisie’).
The
biomolecules
plant
(such
as
phenols,
flavonoids,
saponins,
glycosides,
steroids,
tannins
alkaloids)
were
used
capping
reducing
agent
during
NPs.
Response
surface
methodology
coupled
Box-Behnken
design
(RSM-BBD)
was
to
optimize
adsorption
studies
as-synthesized
Then,
characterized
different
spectroscopic
microscopic
instruments
such
UV–Vis
spectroscopy,
FTIR,
XRD
SEM–EDS
consider
its
purity,
shape
crystallinity.
analysis
showed
peaks
305–312
nm
due
FTIR
availability
phytochemicals
at
490
cm
−1
.
Powder
patterns
confirmed
formation
phase
pure
wurtzite
structures
synthesized
remove
MB
dye
from
solution
by
acting
photocatalyst
adsorbent
well
as,
it
also
antimicrobial
activity
against
two
gram
positive
(
Staphylococcus
epidermidis
,
aureus
)
three
negative
Escherichia
coli
Klebsiella
pneumonia
Pseudomonas
aeruginosa
bacteria.
Materials,
Год журнала:
2021,
Номер
14(24), С. 7537 - 7537
Опубликована: Дек. 8, 2021
The
biosynthesis
of
oxide
semiconductor
nanoparticles
(NPs)
using
materials
found
in
nature
opens
a
wide
field
study
focused
on
sustainability
and
environmental
protection.
Biosynthesized
NPs
have
the
capacity
to
eliminate
organic
dyes,
which
pollute
water
cause
severe
damage
environment.
In
present
work,
green
synthesis
zinc
(ZnO)
was
carried
out
Capsicum
annuum
var.
Anaheim
extract.
photocatalytic
elimination
methylene
blue
(MB),
methyl
orange
(MO),
Rhodamine
B
(RhB)
UV
radiation
evaluated.
were
characterized
by
scanning
transmission
electron
microscopy
(SEM
TEM)
SEM-coupled
energy
dispersive
spectroscopy
(EDS),
attenuated
total
reflectance-infrared
(ATR-IR),
X-ray
photoelectron
(XPS),
diffraction
(XRD),
Photoluminescence
(PL),
ultraviolet-visible
(UV-Vis).
TEM
analysis
showed
an
average
size
40
nm
quasi-spherical
shape.
ATR-IR
ZnO
contained
functional
groups
from
through
XRD
indicated
that
hexagonal
zincite
crystal
structure
with
crystallite
approximately
17
nm.
photoluminescence
spectrum
(PL)
presented
emission
band
at
402
From
UV-Vis
spectra
TAUC
model,
band-gap
value
be
2.93
eV.
Finally,
assessment
proved
achieved
100%
MB
60
min
exposure,
85
92%
degradation
MO
RhB,
respectively,
180
min.
This
indicates
NPs,
addition
friendly
method
for
their
synthesis,
manage
excellent
activity
various
pollutants.
Carbon Trends,
Год журнала:
2021,
Номер
5, С. 100120 - 100120
Опубликована: Окт. 1, 2021
Reduced
graphene
oxide,
the
2-dimensional
sheet
of
sp2
carbon
atoms
arranged
in
a
honeycomb
structure
with
minimum
amount
oxygen
containing
groups,
is
hot
topic
research
due
to
its
versatile
properties
such
as
high
mechanical
strength,
electrical
conductivity,
chemical
properties,
molecular
barrier
abilities
and
optical
properties.
Conventional
methods
for
synthesis
reduced
oxide
involve
harsh
conditions
temperature
toxic
solvents
reagents.
Chemical
reduction
using
green
reductants
an
emerging
area
technology,
considering
sustainable
nature
process.
This
review
discusses
various
nontoxic,
natural
products
biomolecules,
biomass,
waste
etc.
that
have
been
reported
oxide.
The
work
presented
here
offers
perspective
on
future
trends
development
rGO
based
materials,
profitable
applications.
