ACS Sensors,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 25, 2025
Perfluoroisobutyronitrile
(C4F7N),
an
eco-friendly
insulating
gas,
has
been
extensively
utilized
in
diverse
gas-insulated
equipment
(GIE)
to
replace
the
most
potent
greenhouse
gas
SF6.
Nonetheless,
given
low
toxicity
of
C4F7N,
potential
leakage
risk
at
a
high-pressure
operational
environment
cannot
be
overlooked,
making
development
highly
sensitive
sensors
for
leak
detection
essential.
Herein,
Co3O4
was
selected
as
specific
sensing
material
C4F7N
based
on
density
functional
theory
screening.
The
Co3O4-based
sensor
prepared,
and
its
response
performance
systematically
evaluated.
interaction
mechanism
between
also
examined
by
oxygen
vacancy
theory.
demonstrates
limit
0.15
ppm
optimal
operating
temperature
300
°C,
exhibiting
exceptional
selectivity
repeatability,
with
stability
time
55.5
s
recovery
1478
s.
sensor's
application
under
actual
working
settings
validated
using
simulated
test.
Relevant
results
provide
guidance
monitoring
C4F7N-based
GIE.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2023,
Volume and Issue:
11(47), P. 16764 - 16773
Published: Nov. 9, 2023
Owing
to
their
toxicity,
highly
sensitive
detection
of
the
two
main
dihydroxyphenyl
isomers
hydroquinone
(HQ)
and
catechol
(CC)
is
great
significance
for
environmental
monitoring.
In
this
work,
a
novel
strategy
has
been
developed
prepare
ultrafine
Co3O4
nanoparticle-loaded
carbon
spheres
(Co3O4/CSs)
as
high-performance
electrochemical
sensing
materials
simultaneous
determination
HQ
CC.
Ultrafine
nanoparticles
were
formed
uniformly
decorated
on
surface
through
pyrolyzing
cobalt
phthalocyanine
(CoPc)
adsorbed
carbonaceous
(carbonaceous
sphere@CoPc)
in
an
inert
nitrogen
environment.
Electrochemical
measurements
revealed
that
Co3O4/CSs-modified
glassy
electrode
(GCE)
exhibited
excellent
responses
toward
CC
capability.
The
obtained
limits
low
2.6
3.4
nM,
respectively.
Simultaneous
analysis
with
high
repeatability
anti-interference
also
demonstrated,
fundamentally
preserving
individual
sensitivity
without
any
interference.
selectivity
have
further
discussed
combination
special
structure
composition
Co3O4/CSs.
Additionally,
practicality
Co3O4/CSs
sensor
was
evaluated,
satisfactory
results
real
water
samples.
Most
heavy
metals
pose
a
threat
to
ecological
systems,
making
it
crucial
develop
an
analytical
method
simultaneously
detect
multiple
metal
ions.
In
this
study,
novel
electrochemical
sensor
was
fabricated
based
on
Cr-doped
CoCo2O4@NiO2
hybrid
material
for
the
individual
and
simultaneous
selective
detection
of
nanomolar
Pb2+
Cu2+.
A
CoNi
bimetallic
metal–organic
frameworks
(MOF)
precursor
produced
using
one-step
hydration
technique,
followed
by
synthesis
through
calcination.
The
results
N2
adsorption
desorption,
along
with
Scanning
electron
microscope,
revealed
that
composite
exhibited
significant
specific
surface
area
porous
structure,
thereby
notably
enhanced
its
efficacy
in
preconcentration
characterization
valence
changes
transition
ions
(Co2+/Co3+
Ni2+/Ni3+)
could
cyclically
catalyze
ions,
remarkably
enhancing
performance
sensor.
addition,
Cr
doping
effectively
improved
conductivity
catalytic
material.
Differential
pulse
anodic
stripping
voltammetry
employed
investigate
ability
CoCo2O4@NiO2/GCE
Cu2+,
both
individually
simultaneously.
established
sensing
approach
detected
Cu2+
limits
9.6
11.8
nM,
respectively.
Moreover,
also
used
environmental
food
samples.
proposed
analysis
has
great
potential
quantitative
analyses
monitoring
safety
fields.
