Nanomaterials,
Journal Year:
2023,
Volume and Issue:
13(21), P. 2830 - 2830
Published: Oct. 25, 2023
The
fast
rise
of
organic
pollution
has
posed
severe
health
risks
to
human
beings
and
toxic
issues
ecosystems.
Proper
disposal
toward
these
contaminants
is
significant
maintain
a
green
sustainable
development.
Among
various
techniques
for
environmental
remediation,
advanced
oxidation
processes
(AOPs)
can
non-selectively
oxidize
mineralize
into
CO2,
H2O,
inorganic
salts
using
free
radicals
that
are
generated
from
the
activation
oxidants,
such
as
persulfate,
H2O2,
O2,
peracetic
acid,
periodate,
percarbonate,
etc.,
while
oxidants
catalysts
via
Fenton-type
reactions
crucial
production
reactive
oxygen
species
(ROS),
i.e.,
•OH,
•SO4-,
•O2-,
•O3CCH3,
•O2CCH3,
•IO3,
•CO3-,
1O2.
Nanoscale
zero-valent
iron
(nZVI),
with
core
Fe0
performs
sustained
effect
in
AOPs
by
gradually
releasing
ferrous
ions,
been
demonstrated
cost-effective,
high
reactivity,
easy
recovery,
recycling,
environmentally
friendly
heterogeneous
catalyst
AOPs.
combination
nZVI
AOPs,
providing
an
appropriate
way
complete
degradation
pollutants
indiscriminate
ROS,
emerging
important
technique
remediation
received
considerable
attention
last
decade.
following
review
comprises
short
survey
most
recent
reports
applications
participating
their
mechanisms,
future
prospects.
It
contains
six
sections,
introduction
theme,
hydrogen
peroxide,
oxygen,
other
oxidants-based
catalyzed
nZVI,
conclusions
about
reported
research
perspectives
developments.
Elucidation
mechanisms
nZVI-based
may
not
only
pave
more
affordable
AOP
protocols,
but
also
promote
exploration
fabrication
effective
materials
applicable
practical
applications.
Metal-enzyme
cascade
catalysis
effectively
combines
the
broad
reactivity
of
chemical
with
high
selectivity
biocatalysis,
improving
reaction
efficiency
and
simplifying
process
flow
through
multiple
sequential
reactions
in
same
system.
The
introduction
exogenous
palladium
nanoparticles
(Pd
NPs)
into
Escherichia
coli
(E.
coli)
cells
can
significantly
broaden
range
catalytic
facilitated
by
biological
enzymes.
Additionally,
targeted
cytoplasmic
synthesis
Pd
NPs
enhances
their
utilization
intracellular
while
also
eliminating
need
for
separating
purifying
metals
However,
current
methods
largely
enable
periplasmic
space
outer
membrane.
Moreover,
hydrogen
sources
commonly
used
these
methods─such
as
(H2)
sodium
borohydride
(NaBH4)─carry
safety
risks.
In
this
study,
mechanism
on
side
its
were
deeply
investigated
using
a
mild
source,
formate,
combination
genetic
engineering
preparation
conditions.
And
constructed
functional
cell
(Pd@E.
could
catalyze
benzaldehyde
hydrogenation,
conversion
rate
41.41%
benzyl
alcohol
yield
17.68%,
demonstrating
considerable
loading
stability.
This
study
provides
reference
constructing
systems
metal-enzyme
cascades.
Thus,
it
bolster
development
opportunities
areas
non-natural
products
drug
provide
ideas
addressing
drawbacks
existing
biosynthetic
technologies.
