Journal of Composite Materials,
Год журнала:
2023,
Номер
58(1), С. 3 - 12
Опубликована: Ноя. 15, 2023
Improving
the
ablative
resistance
of
carbon/phenolic
(C/Ph)
composites
is
an
urgent
need
in
field
thermal
protection
hypersonic
vehicles.
In
this
paper,
novel
C/Ph
are
fabricated
by
introducing
different
contents
ZrB
2
ceramic
particles,
and
anti-ablation
properties
tested
plasma
wind
tunnel.
Under
mainstream
conditions
with
enthalpy
21.84
MJ/kg,
heat
flux
1.6
MW/m
,
pressure
kPa,
effects
content
on
stability,
linear
ablation
rate
surface
temperature
further
analyzed.
The
maximum
positively
correlated
.
As
increases,
back
face
materials
decreases
gradually,
while
increases
slightly
after
a
significant
decrease.
When
time
50
s,
sample
7%
lowest
(0.0184
mm/s).
These
dates
tunnel
test
could
provide
reference
for
applications
composites.
oxidation
contributes
significantly
to
improving
its
severe
environments.
Accordingly,
optimizing
enables
development
high-performance
enhanced
properties,
reduced
rates,
making
them
well-suited
applications.
Journal of Saudi Chemical Society,
Год журнала:
2023,
Номер
27(3), С. 101639 - 101639
Опубликована: Апрель 1, 2023
The
toxic
dye
pigments,
even
in
small
quantities,
can
damage
ecosystems.
Removing
organic,
inorganic,
and
microbiological
contaminants
from
wastewater
via
heterogeneous
photocatalysis
is
a
promising
method.
Herein,
we
report
the
band
structure
tuning
of
ZnO/CuO
nanocomposites
to
enhance
photocatalytic
activity.
were
synthesized
by
chemical
approach
using
step-wise
implantation
p-type
semiconductor
CuO
n-type
ZnO.
Various
characterization
techniques
such
as
X-ray
diffraction
analysis
(XRD),
field
emission
scanning
electron
microscopy
(FESEM),
energy
dispersive
(EDX)
UV
spectroscopy
used
investigate
crystal
structure,
surface
morphology,
elemental
composition
optical
properties
samples.
As
content
increased
10%
50%
nanocomposites,
bandgap
decreased
3.36
2.14
eV.
activity
samples
was
evaluated
against
degradation
methylene
blue
(MB)
under
visible
irradiation.
Our
study
demonstrates
novel
p–n
junction
oxide
photocatalyst
based
on
wt.
CuO/ZnO
with
superior
Effectively
66.6%
increase
rate
achieved
for
nanocomposite
compared
pure
ZnO
nanoparticles.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(17), С. 6473 - 6484
Опубликована: Март 21, 2024
The
present
strategy
introduces
a
novel
hydrothermal
method
to
develop
rod-like
highly
crystalline
zircon-type
erbium
vanadate
(ErVO4)
structure
combined
with
spherical
shaped
functionalized
boron
nitride
(F-BN),
forming
ErVO4/F-BN
heterostructure,
through
the
sonochemical
method.
resultant
heterostructure
composite
was
characterized
using
different
spectroscopic
techniques,
and
fabricated
on
screen-printed
carbon
paste
electrode
(SPCE)
for
electrochemical
sensing
of
nitrofurazone.
Further
characteristic
analyses
including
cyclic
voltammetry
(CV),
impedance
spectroscopy
(EIS),
differential
pulse
were
performed
analyze
electrocatalytic
reduction
mechanism
NFN.
Fascinatingly,
modified
SPCE
displayed
broad
dynamic
linear
range
0.001
306
μM
limit
detection
0.49
nM
sensitivity
21.178
μA·μM–1·cm–2
also
superior
selectivity
5-fold
variation
toward
interfering
compounds
delivered
excellent
stability,
reproducibility,
practical
analysis
in
real
water
samples,
suggesting
feasibility
application
as
an
sensor
antibiotics.
Arabian Journal of Chemistry,
Год журнала:
2023,
Номер
16(8), С. 104986 - 104986
Опубликована: Май 12, 2023
In
this
study,
polycrystalline
Fe1−xBixVO4
(0.0
≤
x
1.0)
photocatalysts
were
synthesized
hydrothermally.
The
as-produced
photocatalysts'
morphology,
crystal
structure,
chemical
content,
optical
bandgap
energy,
electrochemical
behavior,
and
interfacial
characteristics
measured
using
the
XRD,
SEM,
EDX,
FTIR,
XPS,
UV–Vis-DRS,
BET,
PL
characterizations.
photocatalysis
investigations
conducted
to
see
whether
poisonous
violet
(CV)
dye
could
be
decomposed
over
composite.
surface
plasmon
resonance
(SPR)
nature
of
Bi3+
can
markedly
raise
level
sensitivity
visible
light,
which
would
enhance
photocatalytic
activity.
By
raising
electron
population
in
Fe1−xBixVO4,
Schottky
barrier
that
SPR
produces
at
interface
between
FeVO4
increases
separation
effectiveness
photoinduced
charges.
Various
factors
affecting
degradation
CV
examined
order
optimize
parameters.
According
a
radical
trapping
experiment,
superoxide
(O2¯)
radicals
are
most
active
species
anionic
dye.
comparison
BiVO4,
these
findings
indicate
composite
possesses
excellent
antibacterial
activities.
This
work
presents
novel
approach
boosting
light
absorption,
encourages
development
effective
for
real-world
uses.
To
observe
potential
additional
applications,
antimicrobial
electrical
properties
composites
also
studied,
they
exhibited
good
as
well
responses.
ACS Applied Materials & Interfaces,
Год журнала:
2023,
Номер
15(25), С. 29958 - 29970
Опубликована: Июнь 9, 2023
The
use
of
metal
nanoparticles
(NPs)
as
antimicrobial
agents
has
become
a
promising
alternative
to
the
problem
antibiotic-resistant
bacteria
and
other
applications.
Silver
(AgNPs)
are
well-known
one
most
universal
biocide
compounds.
However,
selenium
(SeNPs)
recently
gained
more
attention
effective
agents.
This
study
aims
investigate
antibacterial
activity
SeNPs
with
different
surface
coatings
(BSA-coated,
chitosan-coated,
undefined
coating)
on
Gram-negative
Stenotrophomonas
bentonitica
Gram-positive
Lysinibacillus
sphaericus
in
comparison
AgNPs.
tested
NPs
had
similar
properties,
including
shape
(spheres),
structure
(amorphous),
size
(50–90
nm),
but
differed
their
charge.
Chitosan
exhibited
positive
charge,
while
remaining
assayed
negative
We
have
found
that
cell
growth
viability
both
were
negatively
affected
presence
NPs,
indicated
by
microcalorimetry
flow
cytometry.
Specifically,
coating
displayed
highest
percentage
values
dead
cells
for
(85–91%).
An
increase
reactive
oxygen
species
(ROS)
production
was
also
detected.
Chitosan-coated
caused
amount
ROS
(299.7
289%
over
untreated
controls)
S.
L.
sphaericus,
respectively.
Based
DNA
degradation
levels,
undefined-SeNPs
be
hazardous,
causing
nearly
80%
degradation.
Finally,
electron
microscopy
revealed
ability
transform
SeNP
types
(amorphous)
crystalline
(trigonal/monoclinical
Se),
which
could
environmentally
implications
bioremediation
purposes
provide
novel
green
method
formation
SeNPs.
results
obtained
herein
demonstrate
potential
medicine
agents,
we
propose
candidates
new
strategies
NP
synthesis
applications
many
fields.
Arabian Journal of Chemistry,
Год журнала:
2023,
Номер
16(8), С. 105020 - 105020
Опубликована: Май 23, 2023
In
the
current
study,
a
type-I
DyVO4/AgBr
heterojunction
was
prepared
by
simple
and
cost-effective
co-precipitation
method
to
obtain
highly
efficient
photocatalyst
for
water
treatment.
The
effect
of
different
molar
ratios
H2Salen
dysprosium
temperature
reaction
studied
on
morphology
products.
As
result
energy
savings,
optimal
preparation
DyVO4
nanoparticles
chosen
as
25
°C,
nanocomposites
were
at
this
temperature.
XRD
results
revealed
that
pure
in
all
conditions.
A
comparative
study
conducted
between
photocatalytic
behavior
DyVO4,
AgBr,
under
UV
visible
radiation.
photodegradation
reveals
performs
better
than
AgBr.
79.8%
72.0%
methylene
blue
(MB)
degraded
light
after
90
min,
respectively.
kinetics
depicts
higher
constant
rate
(k
=
0.0187
min−1)
belongs
nanocomposite
has
maximum
photodegradation.
