Analytical Chemistry,
Год журнала:
2023,
Номер
unknown
Опубликована: Дек. 15, 2023
Achieving
accurate
detection
of
different
speciations
heavy
metal
ions
(HMIs)
in
an
aqueous
solution
is
urgent
problem
due
to
the
bioavailabilities
and
physiological
toxicity.
Herein,
we
nominated
a
novel
strategy
detect
HCrO4–
Cr(OH)2+
at
trace
level
via
electrochemical
sensitive
surface
constructed
by
Co3O4-rGO
modified
with
amino
carboxyl
groups,
which
revealed
that
interactions
between
distinct
functional
groups
oxygen-containing
target
are
conducive
susceptible
anti-interference
detection.
The
sensitivities
19.46
counts
μg–1
L
for
13.44
were
obtained
under
optimal
conditions,
while
limits
0.10
0.12
μg
L–1,
respectively.
Satisfactory
actual
water
sample
analysis
results
obtained.
A
series
advanced
optical
techniques
like
X-ray
photoelectron
spectroscopy,
absorption
near-edge
structure
technology,
density
theory
calculations
electric
field
demonstrated
chemical
contribute
more
fixation
than
electrical
attraction
alone.
presence
from
simple
ionic
forms
was
critical
factor
selectivity
Furthermore,
valence
cycle
Co(II)/(III)
synergistically
boosted
performance.
This
research
provides
promising
tactic
microscopic
perspective
groups'
accomplish
precise
speciation
HMIs
environment.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(7), С. 2900 - 2910
Опубликована: Фев. 7, 2024
With
the
continuous
exploitation
of
arsenic-containing
resources
and
growing
concern
over
arsenic
contamination,
disposal
has
become
a
global
challenge.
Elemental
arsenic,
because
its
nontoxic
nature,
is
considered
preferred
form
for
detoxification
mitigation.
We
introduce
an
innovative
eco-friendly
method
to
convert
highly
toxic
trioxide
into
nonpoisonous
elemental
via
mechanochemical
processing
at
room
temperature.
Utilizing
zinc
powder
as
reductant
acetic
acid
reaction
medium,
we
achieved
remarkable
reduction
efficiency
92.5%,
producing
approximately
99%
purity.
Thermodynamic
analysis
revealed
pivotal
role
in
stabilizing
system
eliminating
formation
arsine.
Density
functional
theory
calculations
further
confirmed
that
H3AsO3
on
surface
was
dominant
Zn–CH3COOH–As2O3
system.
The
introduction
mechanical
force
lowered
relative
energy
reaction,
resulting
superior
performance
under
relatively
mild
conditions.
These
findings
could
pave
way
safe
waste
offer
sustainable
route
reducing
toxicity
trioxide.
Due
to
the
impediments
of
spatial
and
temporal
resolution,
comprehension
microdynamic
processes
still
remains
limited,
which
seriously
hinders
advancement
catalyst
regulating
expansion
application.
Herein,
efficient
selective
bimetallic
atomic
electrode
interface
was
cultivated
via
high-throughput
screening,
achieving
self-adaptive
parallel
electrochemical
reduction
Cu(II)
As(III).
Combined
in
situ
X-ray
absorption
fine
structure
(XAFS)
spectroscopy
coordination
field
theory
verified
Ni-Cu
specific
energy
level
matching
promoted
by
permitted
d-d
transition
also
reproduced
microscopic
dynamic
process.
Additionally,
it
discovered
that
Fe-As
bonding
barrier
smallest
potential-determining
step
(1.40
eV)
were
derived
from
linear
shift
main
s
p
peaks
key
arsenic
intermediates
high-energy
orbital.
This
work
offers
insights
into
transient
reaction
dynamics
methods
theoretical
simulations,
broadens
design
multisite
catalysts.
