Efficient
pretreatment
is
crucial
for
valorization
of
biomasses.
However,
severer
conditions
and
high
energy
consumption
hindered
their
practical
application.
This
work
developed
a
photocatalytic
method
assisted
by
both
ZnIn2S4
catalysis
lignin
autocatalysis
at
mild
conditions.
The
achieved
removal
rate
(71.6%)
cellulose
yield
(94.8%)
in
hemp
fibers,
decreasing
the
major
content
β-O-4
bond
β-β
from
32.0%
to
10.7%
6.8%
3.4%,
respectively.
result
was
attributed
synergistic
action
lignin,
which
reduced
recombination
h+
photoelectron,
producing
more
•O2−
radicals
than
single
or
ZnIn2S4.
Furthermore,
produced
ZnIn2S4,
oxidized
structure
together
with
•O2−.
pretreated
fibers
possessed
excellent
breaking
strength
(4.46
cN/dtex)
fineness
(6.83
dtex).
Moreover,
fibres
were
readily
hydrolyzed
cellulase,
improving
glucose
concentration
58.3%
compared
alkaline
pretreatment.
Overall,
this
explored
potential
photocatalysis
biomasses,
discovered
autocatalysis.
Waste,
Journal Year:
2024,
Volume and Issue:
2(4), P. 451 - 473
Published: Nov. 4, 2024
Lignocellulosic
biomass,
including
agricultural,
forestry,
and
energy
crop
waste,
is
one
of
Earth’s
most
abundant
renewable
resources,
accounting
for
approximately
50%
global
resources.
It
contains
cellulose,
hemicellulose,
lignin,
making
it
crucial
biofuels
bio-based
chemicals.
Due
to
its
complex
structure,
single-pretreatment
methods
are
inefficient,
leading
the
development
combined
pretreatment
technologies.
These
enhance
cellulose
accessibility
conversion
efficiency.
This
paper
analyzes
principles,
advantages,
disadvantages
various
their
practical
benefits.
highlights
recent
research
achievements
applications
in
biofuel,
biochemical
production,
feed.
By
integrating
multiple
methods,
biomass
degradation
efficiency
can
be
significantly
improved,
consumption
reduced,
chemical
reagent
use
minimized.
Future
advancements
physical,
chemical,
biological
technologies
will
further
utilization
efficiency,
reduce
consumption,
protect
environment,
providing
robust
support
sustainable
ecological
protection.
