ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(45), P. 16524 - 16539
Published: Oct. 29, 2024
An
essential
step
in
developing
heterogeneous
metal
catalysts
is
to
locate
their
active
catalytic
sites.
In
contrast
large
nanoparticles
(NPs)
and
isolated
single-atom
(SACs),
supported
clusters
(SMCs)
possess
unique
electronic
geometric
features
that
contribute
improved
properties.
this
study,
the
loading
amount
of
Pt
was
quantified
as
2.5
wt
%,
Pt/TiO2
containing
with
sizes
ranging
from
1
4
nm
were
obtained
order
analyze
influence
cluster
size
on
dehydrogenation
dodecahydro-N-ethylcarbazole
(12H-NECZ).
The
optimal
performance
achieved
2.5PT-6.5-3.0
(Pt-1.72)
catalyst
an
average
1.72
±
0.20
nm,
there
almost
no
byproducts.
Besides,
kinetic
analysis
demonstrated
third
net
stoichiometric
reaction
rate-limiting
step,
k3
values
significantly
appropriate
size.
Furthermore,
a
volcano
plot
existed
between
specific
activities,
where
Pt-1.72
occupied
extreme
point
(4.87
molNECZ/molPt·min).
Combining
experimental
results
previous
reports,
it
could
be
concluded
important
regulate
1–2
range,
so
focused
explored.
It
revealed
different
caused
change
structures,
only
suitable
exhibit
adsorption
activation
capacity
for
reactants
during
12H-NECZ
dehydrogenation,
achieving
DFT
calculations
also
confirmed
enhanced
efficiency
three
steps,
consistent
experiments.
Nanoscale,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
This
review
highlights
recent
advancements
in
TiO
2
photocatalysts,
emphasizing
key
strategies
to
enhance
their
performance
for
environmental
remediation
and
energy
conversion
technologies.
Inorganic Chemistry Frontiers,
Journal Year:
2023,
Volume and Issue:
11(1), P. 11 - 28
Published: Nov. 20, 2023
The
role
and
classification
of
rare
earth
elements
in
photocatalysts
are
summarized,
with
the
aim
providing
suggestions
for
future
development
photocatalysts.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(2), P. 2062 - 2071
Published: Jan. 12, 2024
Numerous
vanadium–titania
composites
have
drawn
significant
interest
as
efficient
photocatalysts
for
the
photocatalytic
oxidation
of
alcohols
into
valuable
aldehydes
or
C–C
coupling
compound
intermediates.
In
this
comparative
study,
potential
two
conformations
catalysts
was
analyzed,
including
a
solid
solution
VTiOx
and
vanadium
oxide
supported
on
titania
VOx/TiO2.
The
distinct
structural
interfaces
among
components
these
resulted
in
notably
divergent
catalytic
performances.
catalyst
is
superior
to
corresponding
VOx/TiO2
photo-oxidation
benzyl
alcohol.
incorporated
lattice
influences
surface
oxygen
vacancy
defects,
examined
by
series
technologies,
thus
distinctly
improving
activity.
experimental
phenomena
with
density
functional
theory
(DFT)
studies
indicate
that
incorporating
V
TiO2
can
effectively
lower
activation
energy
oxygen,
thereby
generation
repair
vacancies
promoting
photo-oxidation.
Environmental Technology & Innovation,
Journal Year:
2024,
Volume and Issue:
36, P. 103752 - 103752
Published: July 16, 2024
Discharging
heavy
metals
into
water
bodies
results
in
global
environmental
risks.
Hexavalent
chromium
(Cr(VI))
is
known
as
a
harmful
substance
that
poses
substantial
health
hazards
to
humans.
This
study
aimed
modify
the
pumice
beads
using
metal-organic
composite
synthesized
by
m-Phenylenediamine
(mPD)
and
Iron
(II)
(FeCl2·4H2O)
via
solvent-free
method
for
photoreduction
of
Cr(VI)
Cr(III)
wastewater.
In
proposed
method,
iron
ions
serve
both
an
electron
generator
linker
polymerization
mPD
on
surface
high-temperature
pyrolysis
process.
The
optimum
molar
ratio
FeCl2·4H2O/mPD
temperature
were
determined
be
1
700
°C.
Moreover,
operative
parameters
such
pH,
hole
scavenger
(formic
acid)
dosage,
photocatalyst
mass,
initial
concentration,
reaction
time
studied
condition
was
obtained
pH
2.0,
dosage
20
mL
L−1,
mass
2
g,
concentration
100
mg
L−1
13
min
irradiation
time.
ability
reduce
at
50
under
natural
sunlight
also
examined
reduction
efficacy
%
achieved
conditions
within
40
60
min;
respectively.
Finally,
reusability
test
conducted
up
10
cycles,
proved
durability
practicality
prepared
photocatalyst.
easy
separation,
short
time,
functioning
exhibited
promising
application
reduction.
