The
objective
of
this
study
was
to
investigate
the
use
LTA-structured
zeolites
as
catalysts
for
synthesizing
glycerol
carbonate
through
transesterification
with
dimethyl
carbonate,
under
mild
reaction
conditions.
To
evaluate
catalysts,
a
range
characterization
techniques,
including
XRD,
AAS,
SEM,
TPD-NH3,
TPD-CO2,
and
FT-IR
probe
molecules
like
pyridine
pyrrole,
along
elemental
analysis,
were
employed.
investigation
focused
on
various
forms
(with
K,
Na,
Ca
cations)
assess
their
impact
activity,
particular
attention
type
ion
utilized
basicity.
Among
these
zeolites,
K-Na-LTA
(3A)
demonstrated
most
promising
performance,
achieving
conversion
rates
ranging
from
55%
77%.
Moreover,
increasing
basicity
in
3A
led
higher
yield.
Encouragingly,
all
tested
samples
exhibited
100%
selectivity,
exclusively
producing
desired
carbonate.
However,
during
catalyst
recycling,
decrease
observed,
likely
due
leaching
active
sites
into
medium.
Methanol
identified
potential
agent
responsible
removal
potassium
ions,
process.
Molecules,
Journal Year:
2025,
Volume and Issue:
30(8), P. 1804 - 1804
Published: April 17, 2025
Rapid
charge
separation
and
transfer
is
the
key
scientific
problem
in
photocatalysis.
The
construction
of
S-scheme
heterojunction
one
effective
strategies
to
promote
maintain
strong
redox
properties.
Herein,
NiO,
K0.2WO3,
NiWO4
ternary
double
K0.2WO3/NiO/NiWO4
(W/NiO)
was
created
by
a
one-step
molten
salt
method.
Ultraviolet-visible
(UV-Vis)
diffuse
reflectance
spectra,
photoluminescence
(PL)
photoelectrochemistry
tests,
other
analyses
revealed
that
heterostructure
broadened
spectral
response
range
NiO
promoted
its
photocarriers.
Compared
with
pristine
modified
enhanced
surface
adsorption
water
molecules
accumulation
intermediate
product
HCOO−,
optimized
CO2
reduction
system,
realizing
improved
CO
yield
373
μmol·g−1·h−1
Ru(byp)32+/ethanolamine
system.
This
study
indicates
could
facilitate
efficient
photogenerated
separation,
thereby
achieving
high
activity
selectivity
for
photoreduction.
Our
work
provides
reference
heterojunction.
Molecules,
Journal Year:
2024,
Volume and Issue:
29(22), P. 5380 - 5380
Published: Nov. 15, 2024
The
aim
of
this
work
was
to
investigate
the
hydrocracking
algae
oil
derived
from
Spirulina
Platensis
species
catalyzed
with
bi-component
nickel-zirconia
catalysts
supported
onto
different
carriers
(BEA,
ZSM-5
and
Al
The
objective
of
this
study
was
to
investigate
the
use
LTA-structured
zeolites
as
catalysts
for
synthesizing
glycerol
carbonate
through
transesterification
with
dimethyl
carbonate,
under
mild
reaction
conditions.
To
evaluate
catalysts,
a
range
characterization
techniques,
including
XRD,
AAS,
SEM,
TPD-NH3,
TPD-CO2,
and
FT-IR
probe
molecules
like
pyridine
pyrrole,
along
elemental
analysis,
were
employed.
investigation
focused
on
various
forms
(with
K,
Na,
Ca
cations)
assess
their
impact
activity,
particular
attention
type
ion
utilized
basicity.
Among
these
zeolites,
K-Na-LTA
(3A)
demonstrated
most
promising
performance,
achieving
conversion
rates
ranging
from
55%
77%.
Moreover,
increasing
basicity
in
3A
led
higher
yield.
Encouragingly,
all
tested
samples
exhibited
100%
selectivity,
exclusively
producing
desired
carbonate.
However,
during
catalyst
recycling,
decrease
observed,
likely
due
leaching
active
sites
into
medium.
Methanol
identified
potential
agent
responsible
removal
potassium
ions,
process.
