Sustainability,
Journal Year:
2024,
Volume and Issue:
16(23), P. 10761 - 10761
Published: Dec. 8, 2024
The
presence
of
pharmaceuticals
in
aquatic
ecosystems
is
an
issue
increasing
concern.
Regardless
the
low
concentration
water,
they
can
have
a
toxic
effect
on
both
humans
and
organisms.
Advanced
oxidation
processes
(AOPs)
been
described
as
promising
technique
for
eliminating
due
to
their
high
efficiency.
However,
cost
associated
with
application
these
reagents
energy
requirements
affected
implementation
AOPs
at
large
scales.
Biochar
has
suggested
be
used
catalyst
overcome
limitations.
considered
alternative
heterogeneous
thanks
its
physicochemical
characteristics
like
specific
surface
area,
porous
structure,
oxygen-containing
functional
groups,
electrical
conductivity,
persistent
free
radicals
(PFRs),
modifiable
properties,
structure
defects.
This
carbonaceous
material
presents
capacity
activate
oxidizing
agents
leading
formation
radical
species,
which
are
needed
degrade
pharmaceuticals.
Additionally,
AOP/biochar
systems
destroy
pharmaceutical
molecules
following
non-radical
pathway.
To
enhance
biochar
catalytic
performance,
modifications
such
iron
(Fe)
impregnation,
heteroatom
doping,
supporting
semiconductors
surface.
Although
efficiently
combination
several
mineralization
from
further
research
must
conducted
evaluate
different
regeneration
techniques
increase
biochar’s
sustainable
applicability
reduce
operational
combined
process.
Moreover,
conditions
influencing
system
required
evaluated
discern
find
that
maximize
degradation
by
systems.
Processes,
Journal Year:
2024,
Volume and Issue:
12(12), P. 2746 - 2746
Published: Dec. 3, 2024
Many
semiconductor
photocatalysts
are
characterized
by
high
photostability
and
non-toxicity
but
suffer
from
the
limited
excitation
in
UV
part
of
spectrum
fast
recombination
photogenerated
electron–hole
pairs.
To
improve
above
properties,
biochar-supported
composite
have
recently
attracted
much
attention.
Compared
with
pure
photocatalyst,
biochar-enriched
catalyst
has
superior
specific
surface
area
porosity,
catalytic
efficiency,
stability,
recoverability.
Biochar
can
be
obtained
various
carbon-rich
plant
or
animal
wastes
different
thermochemical
processes
such
as
pyrolysis,
hydrothermal
carbonization,
torrefaction,
gasification.
The
main
features
biochar
its
low
price,
non-toxicity,
large
number
functional
groups.
This
paper
systematically
presents
latest
research
results
on
method
preparation
composites
terms
choice
photoactive
species
source
biomass,
their
physico-chemical
mechanism
photocatalytic
activity,
degradation
efficiency
treatment
organic
contaminants
(dyes
antibiotics)
an
aquatic
environment.
Particular
emphasis
is
placed
understanding
role
improving
activity
species.
The
interplay
between
high-energy
holes
and
reactive
oxygen
species
(ROS)
in
the
deep
mineralization
of
organic
pollutants
remains
a
relatively
uncharted
domain.
Unlocking
mechanisms
by
which
facilitate
contaminants
during
photocatalysis
is
critical
for
achieving
mineralization.
Here,
we
synthesized
an
oxygen-doped/biochar-modified
2D
C3N4
(termed
A-CN)
via
calcination
supramolecular
precursor
assembled
on
hydroxyl-rich
aloe
fiber.
This
dual
modification
strategy
altered
interlayer
electronic
structure
in-plane
configuration
A-CN,
promoting
its
photocatalytic
activity.
synchronized
evaluation
removal
efficiency
toxicity
analysis
attests
to
antibiotic
contaminant,
while
continuous
degradation
system
underscores
stability
A-CN.
A-CN
exhibited
95%
within
1
h,
2.23-fold
more
efficient
than
bulk
carbon
nitride
(B-CN),
88%
rate,
4.81-fold
higher
B-CN.
In
flow
device
(a
rate
2
mL/min),
about
92%.
mechanism
primarily
involves
hole-mediated
deamidation
ROS-driven
oxidative
ring-opening
reactions,
facilitating
structural
disassembly
antibiotics.
investigation
potential
biochar/oxygen
doping-induced
ROS
pollutant
remediation,
providing
effective
protocol
degradation.
