Analytical Chemistry,
Год журнала:
2021,
Номер
93(17), С. 6706 - 6714
Опубликована: Апрель 21, 2021
In
this
work,
we
fabricated
fast-responsive
and
highly
sensitive
chemiresistive
sensors
based
on
nanocomposites
of
polypyrrole
graphitic
materials
such
as
graphene
oxide
(GO),
reduced
(RGO),
sulfonated
(SRGO)
by
an
in
situ
chemical
oxidative
polymerization
method.
The
synthesized
were
characterized
using
field
emission
scanning
electron
microscopy
(FESEM),
energy-dispersive
spectroscopy
(EDS),
Fourier
transform
infrared
(FT-IR)
spectroscopy,
X-ray
diffraction
(XRD).
effects
the
operating
temperature
different
investigated
at
four
temperatures
(28,
40,
50,
60
°C),
results
compared
with
that
polypyrrole-based
sensor.
experimental
for
indicate
proposed
PPy/SRGO
sensor
could
be
appropriate
choice
NH3
detection
28
°C
range
0.50
parts
per
billion
(ppb)
to
12
million
(ppm).
nanocomposite
gas
exhibited
fast
responsivity,
good
repeatability,
high
selectivity
low-concentration
ammonia
against
humidity,
methanol,
ethanol,
acetone,
formaldehyde,
dibutylamine,
dimethylamine,
methylamine,
carbon
monoxide,
nitrogen
°C.
We
utilized
studying
variation
concentration
hemodialysis
(HD)
patients'
breath
before
after
dialysis
correlated
it
blood
urea
(BUN)
levels.
indicated
significantly
decreased
agreement
BUN.
demonstrate
potential
application
noninvasive
make
type
a
promising
tool
diagnosis
renal
liver
diseases.
ACS Applied Materials & Interfaces,
Год журнала:
2020,
Номер
12(23), С. 26161 - 26169
Опубликована: Май 11, 2020
The
development
of
acetone
gas
sensors
is
desirable
but
challenging
for
both
air
quality
monitoring
and
medical
diagnosis.
Herein,
starting
from
bimetallic
In/Ga
metal–organic
frameworks
(MOFs)
(MIL-68
(In/Ga)),
a
facile
strategy
proposed
to
couple
with
zinc
ions
design
oxide
(IGO)@ZnO
core–shell
nanotubes
efficient
detection.
In
such
heterostructure,
tiny
ZnO
nanoparticles
are
closely
decorated
on
IGO
nanotubes,
which
beneficial
enlarge
the
specific
surface
area
create
rich
oxygen
vacancies
heterojunction
interfaces.
Benefiting
structural
merits
synergetic
effects,
IGO@ZnO-based
sensor
exhibits
low
detection
limitation
(200
ppb),
high
response,
good
linearity
relationship
between
sensing
responses
wide
testing
concentrations,
fast
response
recovery
time
(6.8/6.1
s)
selectivity
stability.
These
performances
strongly
indicate
practical
application
quantitatively
detect
acetone.
Analytical Chemistry,
Год журнала:
2021,
Номер
93(17), С. 6706 - 6714
Опубликована: Апрель 21, 2021
In
this
work,
we
fabricated
fast-responsive
and
highly
sensitive
chemiresistive
sensors
based
on
nanocomposites
of
polypyrrole
graphitic
materials
such
as
graphene
oxide
(GO),
reduced
(RGO),
sulfonated
(SRGO)
by
an
in
situ
chemical
oxidative
polymerization
method.
The
synthesized
were
characterized
using
field
emission
scanning
electron
microscopy
(FESEM),
energy-dispersive
spectroscopy
(EDS),
Fourier
transform
infrared
(FT-IR)
spectroscopy,
X-ray
diffraction
(XRD).
effects
the
operating
temperature
different
investigated
at
four
temperatures
(28,
40,
50,
60
°C),
results
compared
with
that
polypyrrole-based
sensor.
experimental
for
indicate
proposed
PPy/SRGO
sensor
could
be
appropriate
choice
NH3
detection
28
°C
range
0.50
parts
per
billion
(ppb)
to
12
million
(ppm).
nanocomposite
gas
exhibited
fast
responsivity,
good
repeatability,
high
selectivity
low-concentration
ammonia
against
humidity,
methanol,
ethanol,
acetone,
formaldehyde,
dibutylamine,
dimethylamine,
methylamine,
carbon
monoxide,
nitrogen
°C.
We
utilized
studying
variation
concentration
hemodialysis
(HD)
patients'
breath
before
after
dialysis
correlated
it
blood
urea
(BUN)
levels.
indicated
significantly
decreased
agreement
BUN.
demonstrate
potential
application
noninvasive
make
type
a
promising
tool
diagnosis
renal
liver
diseases.
