Nanotechnology,
Journal Year:
2024,
Volume and Issue:
35(49), P. 495704 - 495704
Published: Sept. 19, 2024
Abstract
The
selective
cleavage
of
lignin
C–C
bonds
is
a
highly
sought-after
process
with
the
goal
obtaining
low-molecular-weight
aromatic
chemicals
from
renewable
resources.
However,
it
remains
challenging
task
to
achieve
under
mild
conditions.
Photocatalysis
potentially
promising
approach
address
this
issue,
but
development
efficient
photocatalysts
still
in
progress.
In
study,
we
introduce
heterostructured
TiO
2
@g-C
3
N
4
photocatalyst
for
visible
light
photocatalytic
procedure
displays
favourable
absorption,
charge
separation
efficiency,
and
reusability.
A
typical
β
–O–4
dimer
model,
2-phenoxy-1-phenylethanol,
was
effectively
(96.0%
conversion)
selectively
(95.0
selectivity)
cleaved
at
ambient
This
also
effective
when
subjected
solar
irradiation
or
other
models
-1
linkages.
reaction
occurred
through
C
-centred
radical
intermediate
six-membered
transition
state
photogenerated
holes
as
primary
active
species.
α
–OH
oxidative
dehydrogenation
substrate
could
take
place
relatively
minor
route.
study
provides
new
visible-light-driven
valorisation
sheds
on
design
high-performance
nanocomposite
bond
cleavage.
Lignin
is
the
most
promising
candidate
for
producing
aromatic
compounds
from
biomass.
However,
challenge
lies
in
cleavage
of
C-C
bonds
between
lignin
monomers
under
mild
conditions,
as
these
have
high
dissociation
energy.
Electrochemical
oxidation,
which
allows
bonds,
considered
an
attractive
solution.
To
achieve
low-energy
consumption
valorization
lignin,
use
highly
efficient
electrocatalysts
essential.
In
this
study,
a
meticulously
designed
catalyst
consisting
cobalt-doped
nickel
(oxy)hydroxide
on
molybdenum
disulfide
heterojunction
was
developed.
The
presence
valence
state
promoted
adsorption
tert-butyl
hydroperoxide,
leading
to
formation
critical
radical
intermediates.
addition,
incorporation
cobalt
doping
regulated
electronic
structure
nickel,
resulting
lower
energy
barrier.
As
result,
demonstrated
selectivity
85.36%
cleaving
Cα-Cβ
bond
model
compound,
achieving
substrate
conversion
93.69%
ambient
conditions.
electrocatalyst
depolymerized
49.82
wt%
soluble
fractions
organosolv
(OL),
yield
up
13
monomers.
Significantly,
effectiveness
prepared
also
using
industrial
Kraft
(KL).
Therefore,
research
offers
practical
approach
implementing
electrocatalytic
oxidation
refining.
