Journal of Advanced Ceramics,
Journal Year:
2023,
Volume and Issue:
12(3), P. 553 - 564
Published: Feb. 17, 2023
The
development
of
low-cost,
stable,
and
robust
non-noble
metal
catalysts
for
water
oxidation
is
a
pivotal
challenge
sustainable
hydrogen
production
through
electrocatalytic
splitting.
Currently,
such
suffer
from
high
overpotential
sluggish
kinetics
in
oxygen
evolution
reactions
(OERs).
Herein,
we
report
"continuous"
single-crystal
honeycomb-like
MXene/NiFePx–N-doped
carbon
(NC)
heterostructure,
which
ultrasmall
NiFePx
nanoparticles
(NPs)
encapsulated
the
NC
are
tightly
anchored
on
layered
MXene.
Interestingly,
this
MXene/NiFePx–NC
delivers
outstanding
OER
catalytic
performance,
stems
characteristics,
abundant
active
sites
derived
NPs,
stable
heterostructure
with
an
open
structure.
experimental
results
rationalized
theoretically
(by
density
functional
theory
(DFT)
calculations),
suggests
that
it
unique
promotes
OER,
thereby
enabling
superior
durability
excellent
activity
ultralow
240
mV
at
current
10
mA·cm−2.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(14), P. 5227 - 5240
Published: Jan. 1, 2024
Tuning
and
stabilizing
the
chemical
microenvironment
of
Pt-based
single-atom
catalysts
is
a
major
challenge
in
promoting
an
electrocatalytic
hydrogen
evolution
reaction
(HER).
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(4), P. 4239 - 4251
Published: Feb. 5, 2024
With
the
rapid
development
of
global
industrialization,
industrial
production
leads
to
emission
large
quantities
toxic
gases
and
long-term
exposure
these
air
poses
a
serious
threat
human
health
ecological
environment.
Therefore,
online
monitoring
is
worthy
task.
In
this
work,
structures
pristine
cerium
oxide
(CeO2)
nickel-doped
(Ni-CeO2)
surfaces
are
established
based
on
first-principles,
12
adsorption
NH3,
CH4,
SO2,
H2S,
CO,
C2H4
gas
molecules
CeO2
Ni-CeO2
constructed
by
geometrical
optimization.
We
investigate
performance
gas-sensing
mechanism
each
system
from
various
aspects,
such
as
energy,
band
gap,
electron
density,
density
states,
frontier
molecular
orbital
theory,
conductivity,
sensitivity,
recovery
time,
work
function.
The
results
showed
that
significantly
improved
properties
(−1.784
eV),
H2S
(−1.036
SO2
(−1.731
NH3
(−1.045
eV).
Ni-CeO2/C2H4
exhibits
high
response
(116.414),
function
(4.45
fast
(74.24
s)
well
strong
resistivity
changes.
Hence,
theoretical
simulation
experiments
in
paper
provide
guidance
for
highly
sensitive,
type
sensor
detection
harmful
atmosphere.
Arabian Journal of Chemistry,
Journal Year:
2022,
Volume and Issue:
16(2), P. 104450 - 104450
Published: Nov. 25, 2022
Nanocomposite
materials
have
been
successfully
applied
to
remediation
of
organic
and
inorganic
contaminants
from
polluted
water.
The
present
study
investigates
the
synthesis,
characterizations,
adsorptive
performances
graphene
oxide/SiO2
nanocomposite-based
adsorbent.
Graphene
was
used
for
adsorption
methylene
blue
(MB)
Cr
(VI)
ion
wastewater.
Furthermore,
antibacterial
activity
performance
synthesized
nanocomposite
studied.
consideration
has
performed
by
various
parameters
in
our
laboratory.
X-ray
crystallography
(XRD),
Scanning
electron
microscope
(SEM),
Energy
Dispersive
Analysis
(EDX)
and,
thermal
gravimetric
analysis
(TGA)
methods
were
characterization,
morphological
structure,
crystallinity,
stability
oxide/SiO2.
Maximum
capacities
oxide/SiO2-based
adsorbent
had
evaluated
Langmuir
isotherm
model
MB
as
555.50
181.81
mg/g,
respectively.
Generally,
experiments
revealed
that
all
adsorbents
found
order
>
(VI).
against
gram-positive
gram-negative
bacteria
showed
proved
composite
a
remarkable
ability
kill
bacteria.
Journal of Advanced Ceramics,
Journal Year:
2023,
Volume and Issue:
13(1), P. 11 - 18
Published: Nov. 27, 2023
Two-dimensional
(2D)
nanomaterials,
such
as
graphene,
MoS2,
and
MAX,
have
attracted
increasing
research
attention
in
recent
years
due
to
their
unique
structural
performance
advantages.
However,
complex
production
processes
equipment
requirements
are
significant
issues
affecting
widespread
use.
Here,
by
using
an
exfoliation
strategy
three-roll
milling,
we
present
a
simple,
cost-effective,
extensible
method
produce
multilayer
BN,
Ti3AlC2
nanosheets.
The
roller
phenolic
resin
created
three
kinds
of
forces
on
the
layered
2D
materials,
shear
forces,
compressive
adhesive
which
exfoliated
materials
from
edges
surfaces
into
Subsequently,
were
ultrasonically
washed
with
alcohol,
treated
ultrasonic
vibration
centrifuged
obtain
nanomaterials.
easy
operation
high
yield
attractive
for
based
construction
high-performance
nanosheet-based
devices
at
low
cost.
Herein,
obtained
graphene
MoS2
nanosheets
used
anode
material
sodium/potassium-ion
batteries,
respectively,
test
electrochemical
properties.
Better
performances
compared
primary
bulk
materials.
Buildings,
Journal Year:
2023,
Volume and Issue:
13(1), P. 129 - 129
Published: Jan. 4, 2023
The
reinforcement
of
ultra-high-performance
concrete
(UHPC)
with
fibers
was
investigated
in
this
study.
Concrete
is
the
most
widely
used
manmade
construction
material,
and
UHPC
has
remarkable
mechanical
properties.
properties
can
be
modified
by
a
variety
curing
procedures
amount
cement
used.
This
study
aimed
to
examine
impact
fiber
reinforcement,
temperature,
exposure
time
on
UHPC.
Initially,
temperature
for
changed
from
300
°C
500
set
1
2
h.
Various
combinations
ultrasonic
pulse,
thermal
conductivity,
compressive
strength,
flexural
splitting,
modulus
elasticity,
drop
hammer
(impact
resistance,
energy,
ductility
index)
were
after
91
days
steam
curing.
For
curing,
kept
at
90
three
days.
characteristics
primary
focus
research.
test
results
showed
that
accelerated
regime
achieved
maximum
strength
102.6
MPa
specimens
without
124.7
fibers,
which
represents
22%
increase
strength.
When
compared
all
qualities
improved,
especially
when
subjected
high
temperatures.
incorporation
hybrid
synthetic
waste
key
aspect
developing
new
ultra-high-strength
features.
Heliyon,
Journal Year:
2023,
Volume and Issue:
9(2), P. e13687 - e13687
Published: Feb. 1, 2023
Perovskite
materials
play
a
vital
role
in
the
field
of
material
science
via
experimental
as
well
theoretical
calculations.
Radium
semiconductor
are
considered
backbone
medical
fields.
These
high
technological
fields
to
be
used
controlling
decay
ability.
In
this
study,
radium-based
cubic
fluoro-perovskite
XRaF3
(where
X
=
Rb
and
Na)
calculated
using
DFT
(density
functional
theory).
compounds
nature
with
221
space
groups
that
construct
on
CASTEP
(Cambridge-serial-total-energy-package)
software
ultra-soft
PPPW
(pseudo-potential
plane-wave)
GGA
(Generalized-Gradient-approximation)-PBE
(Perdew-Burke-Ernzerhof)
exchange-correlation
functional.
The
structural,
optical,
electronic,
mechanical
properties
calculated.
According
structural
properties,
NaRaF3
RbRaF3
have
direct
bandgap
3.10eV
4.187eV
RbRaF3,
respectively.
Total
density
states
(DOS)
partial
(PDOS)
provide
confirmation
degree
electrons
localized
distinct
bands.
is
semiconductors
insulator,
according
electronic
results.
imaginary
element
dispersion
dielectric
function
reveals
its
wide
variety
energy
transparency.
both
compounds,
optical
transitions
examined
by
fitting
damping
ratio
for
notional
scaling
appropriate
peaks.
absorption
conductivity
compound
better
than
which
make
it
suitable
solar
cell
applications
increasing
efficiency
work
function.
We
observed
mechanically
stable
structure.
criteria
stability
also
met
estimated
elastic
potential
application
medical.The
band
gap,
necessary
conditions
applications.
Here,
literature
was
reviewed
check
computational
translational
insight
into
relationships
between
novel
compounds.
