Langmuir,
Journal Year:
2023,
Volume and Issue:
39(40), P. 14189 - 14203
Published: Sept. 30, 2023
The
primary
factors
that
govern
the
selectivity
and
efficacy
of
CO2
photoreduction
are
degree
activation
on
active
surface
sites
photocatalysts
charge
separation/transfer
kinetics.
In
this
context,
rational
synthesis
heterostructured
MXene-coupled
CeO2-based
with
different
loading
concentrations
Ti3C2MXene
via
a
one-step
hydrothermal
approach
has
been
undertaken.
These
exhibit
shift
in
X-ray
diffraction
peaks
to
higher
2θ
values
changes
stretching
vibrations
5
wt
%
Ti3C2MXene/CeO2(5-TC/Ce)
indicate
interaction
between
CeO2.
Moreover,
XPS
analysis
confirms
presence
Ce3+/Ce4+
states.
A
sharp
band
at
2335
cm-1
observed
during
process
corresponds
bidentate
b-CO32-,
which
facilitates
adsorption
catalyst
as
revealed
by
TPD
analysis.
Furthermore,
Schryvers
test
NMR
were
undertaken
confirm
formaldehyde
intermediate
formation
C2H5OH.
decrease
emission
intensity,
reduced
lifetimes
(2.68
ns),
lower
interfacial
resistance,
PL,
TR-PL,
EIS
analysis,
imply
an
efficient
separation
transfer
case
Ti3C2MXene/CeO2
heterojunction.
intensity
EPR
spectrum
5-TC/Ce
further
kinetics
across
interface.
optimized
shows
reduction
drastically
enhanced
yield
ethanol
order
6127
μmol
g-1
h
98%
7.54%
apparent
quantum
efficiency,
is
6-fold
than
produced
bare
Herein,
CeO2
acts
redox
couple
(Ce3+/Ce4+)
when
coupled
MXene
having
metallic
nature
reduces
electron
resistance
unison,
enabling
mobilization
electrons.
Thereby,
synergistic
coupling
leads
under
visible
light
illumination.
