Catalysts,
Год журнала:
2023,
Номер
13(7), С. 1085 - 1085
Опубликована: Июль 10, 2023
The
shortage
of
water
resources
has
caused
extensive
research
to
be
conducted
in
this
field
develop
effective,
rapid,
and
affordable
wastewater
treatment
methods.
For
the
wastewater,
modern
oxidation
techniques
are
desirable
due
their
excellent
performance
simplicity
implementation.
In
project,
wet
impregnation
hydrothermal
technique
were
applied
synthesize
a
modified
catalyst.
Different
analysis
methods
used
determine
its
characteristics,
including
XRD,
BET,
FT-IR,
NH3−TPD,
FE-SEM.
catalyst
features
spherical
shape,
large
surface
area,
high
crystallinity,
uniform
active
phase
dispersion.
order
eliminate
methylene
blue
dye
as
modeling
effluent,
catalyst’s
was
examined
heterogeneous
quasi-electro-Fenton
(EF)
reaction.
impact
various
such
concentration
reaction
medium,
solution
pH,
current
intensity
between
two
electrodes,
elucidated.
According
results,
best
operational
circumstances
included
pH
level
2,
0.15
g/L,
150
mA,
resulting
greatest
elimination
efficiency
101%.
stable
during
three
consecutive
tests.
A
pseudo-first-order
model
for
reaction’s
kinetics
developed,
which
showed
acceptable
agreement
with
experimental
results.
This
study’s
findings
help
clarify
how
well
zeolite
functions
pseudo-EF
results
revealed
method’s
potential
implemented
treatment.
An
artificial
neural
network
is
utilized
predict
removal
percentage.
hyperparameter
tuning
find
model,
achieved
an
MAE
1.26%
R2
0.99.
ACS Catalysis,
Год журнала:
2024,
Номер
14(4), С. 2532 - 2544
Опубликована: Фев. 2, 2024
The
elimination
of
propane
is
one
the
key
tasks
in
reducing
volatile
organic
compounds
(VOCs)
and
automotive
exhaust
emissions.
platinum
nanoparticle
(NP)
a
promising
catalyst
for
oxidation,
while
study
its
structural
characteristics
functionality
remains
infancy.
In
this
work,
we
synthesized
nanocubes
CeO2
with
well-defined
(100)
facet
supporting
Pt
NPs
various
sizes,
from
1.3
to
7
nm,
systematically
investigated
effect
size
on
complete
oxidation
efficiency.
particular,
CeO2(100)
supported
smaller
than
4
nm
promote
formation
positively
charged
sites,
which
hinder
adsorption
activation
reduce
intrinsic
activity
oxidation.
Consequently,
within
range,
catalytic
performance
primarily
influenced
by
electronic
state
species,
metallic
being
identified
as
active
site
reaction.
Conversely,
particle
exceeds
particles
become
dominant
geometric
structure
starts
influence
well.
Such
entanglement
factors
gives
rise
volcano
relationship
between
reaction
rates
sizes
ranging
an
increased
correlation
can
be
observed
turnover
frequencies
range.
This
knowledge
guide
synthesis
highly
catalysts,
enabling
efficient
VOCs
reduced
precious
metal
loadings.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(6), С. 3764 - 3772
Опубликована: Фев. 2, 2024
TiO2-supported
Pt
species
have
been
widely
applied
in
numerous
critical
reactions
involving
photo-,
thermo-,
and
electrochemical-catalysis
for
decades.
Manipulation
of
the
state
Pt/TiO2
catalysts
is
crucial
fine-tuning
their
catalytic
performance.
Here,
we
report
an
interesting
discovery
showing
epitaxial
growth
PtO2
atomic
layers
on
rutile
TiO2,
potentially
allowing
control
states
active
catalysts.
The
presence
could
modulate
geometric
configuration
electronic
under
reduction
conditions,
resulting
a
spread
particle
shape
obtaining
Pt/PtO2/TiO2
structure
with
more
positive
valence
species.
As
result,
such
catalyst
exhibits
exceptional
electrocatalytic
activity
stability
toward
hydrogen
evolution
reaction,
while
also
promoting
thermocatalytic
CO
oxidation,
surpassing
performance
no
structure.
This
novel
TiO2
shows
its
potential
rational
design
highly
economical
diverse
reactions.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Март 5, 2024
Abstract
Centrosymmetric-oxide/polydimethylsiloxane
elastomers
emit
ultra-strong
non-pre-irradiation
mechanoluminescence
under
stress
and
are
considered
one
of
the
most
ideal
materials.
However,
previous
centrosymmetric-oxide/polydimethylsiloxane
show
severe
degradation
stretching,
which
limits
their
use
in
applications.
Here
we
an
elastomer
based
on
centrosymmetric
fluoride
CaF
2
:Tb
3+
polydimethylsiloxane,
with
that
can
self-recover
after
each
stretching.
Experimentation
indicates
self-recoverable
/polydimethylsiloxane
occurs
essentially
due
to
contact
electrification
arising
from
contact-separation
interactions
between
phosphors
polydimethylsiloxane.
Accordingly,
a
cycle
model
phosphor–polydimethylsiloxane
couple
is
established,
first-principles
calculations
performed
state
energies
cycle.
The
results
reveal
fluoride–polydimethylsiloxane
helps
induce
maintain
at
interface,
resulting
elastomer.
Therefore,
it
would
be
good
strategy
develop
Mechanics of Advanced Materials and Structures,
Год журнала:
2023,
Номер
31(26), С. 7777 - 7787
Опубликована: Сен. 5, 2023
AbstractIn
the
present
work,
mechanical,
physical,
wettability,
and
microstructure
characterization
were
employed
to
evaluate
performance
of
composite
material.
Uniform
distribution
with
a
good
interfacial
layer
SAC
Si3N4
was
observed
for
PET/8.75%Si3N4+8.75%
wasteSAC
powder
Results
showed
significant
improvements
in
tensile
(60.55%),
hardness
(150.99%),
bending
(228.47%),
compressive
strength
(105.56%)
compared
neat
PET-based
composites
after
addition
8.75%Si3N4+8.75%
powder.
Therefore,
studied
could
be
replacement
metals
ceramics,
various
structural
functional
applications
due
their
improved
mechanical
thermal
properties.Keywords:
Interfacial
bondingSi3N4SACmechanical
propertiespolymer
compositepolyethylene
terephthalate
(PET)
Disclosure
statementNo
potential
conflict
interest
reported
by
author(s).
Environmental Technology & Innovation,
Год журнала:
2023,
Номер
32, С. 103307 - 103307
Опубликована: Июль 27, 2023
In
the
current
study,
rice
husk
ash
(RHA)
was
used
as
a
support
in
fabrication
of
heterogeneous
catalyst
(RHA/CuO/K2CO3)
for
generating
biodiesel
from
sunflower
and
castor
oil.
The
value
specific
surface
RHA,
CuO,
RHA/CuO,
RHA/CuO/K2CO3
determined
to
be
3.63,
54.29,
25.47,
8.17
m2/g,
respectively.
Based
on
average
roughness
(Ra),
inclusion
CuO
RHA
structure
improved
which
can
improve
interaction
active
phase
(K2CO3)
with
structure.
maximum
production
(99.2%)
oil
(98.1%)
obtained
at
amount
3
wt%,
'CH3OH:
oil'
molar
ratio
18:1,
reaction
temperature
65
°C,
time
120
min.
activation
energy
transesterification
process
calculated
52.79
40.09
kJ/mol,
Also,
ΔH
number
50.05
37.35
respectively,
shows
that
is
an
endothermic
process.
environmental
factor
(<
0.5),
biocompatibility
produced
fuel
confirmed.
It
should
noted
quality
according
ASTM
D6751
EN
14214
standards
replace
traditional
diesel.
Environmental Technology & Innovation,
Год журнала:
2023,
Номер
32, С. 103403 - 103403
Опубликована: Окт. 12, 2023
In
the
current
work,
new
heterogeneous
nonobiocomposite
of
g-C3N4/HAp/Fe3O4/K2CO3
was
made
from
chicken
bone
and
melamine
used
in
biofuel
generation
edible
waste
oil
(EWO).
FTIR,
SEM,
Map-EDX,
BET,
VSM,
XRD
techniques
confirmed
that
catalyst
synthesized.
The
magnetic
saturation
number
BET
value
were
determined
to
be
8.89
emu.g-1
3.95
m2.g-1,
respectively.
impact
temperature,
time,
mass,
ratio
methanol:
Oil
(MeOH:
Oil)
on
production
explored
using
response
surface
method-central
composite
design.
maximum
yield
EWO
(98.52%)
achieved
at
contact
time
150
min,
temperature
65
oC,
amount
3
wt%,
MeOH:
15:1.
Activation
energy
k0
for
transesterification
process
computed
58.91
kJ.mol-1
3.24×107
min-1,
values
ΔH
ΔG
positive
process,
which
indicates
is
exothermic
non-spontaneous.
environmental
factor
(E)
also
showed
has
negligible
harmful
effects
environment.
can
effectively
reused
many
times
process.
produced
good
compliance
with
famous
standards
serve
as
a
suitable
fuel
source.
