Chemical Communications,
Год журнала:
2023,
Номер
59(18), С. 2636 - 2639
Опубликована: Янв. 1, 2023
Here,
we
demonstrate
a
new
electrochemical
sensing
mechanism
of
ammonium
ions
(NH4+)
involving
two-electron
oxygen
reduction
reaction
(ORR)
and
hydrazine
reaction.
The
NH4+
are
electrooxidized
to
by
H2O2
derived
from
the
ORR
over
self-supporting
Ag/TiO2
nanotube
array
composite
electrode
modified
hematite
(Ag/Fe2O3/TNTs).
Ag/Fe2O3/TNT
sensor
exhibits
high
sensitivity
1876
µA
mM-1
cm-2
with
detection
limit
0.18
µM
under
non-alkaline
conditions,
short
response
time
3
s,
good
reproducibility,
fine
selectivity
among
various
interferents,
is
also
successfully
used
in
real
water
bodies
display
accuracy.
Furthermore,
this
has
certain
universality
range
Ag
(main
catalyst)/transition
metal
oxide
(cocatalyst)/TNT
systems.
This
work
offers
design
basis
for
urgently
needed
ammonia
nitrogen
sensors.
RSC Applied Polymers,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
The
bindone
polymer
displays
a
highly
sensitive,
selective
and
reversible
colorimetric
response
to
alkyl
amines
via
tautomerisation
mechanism,
highlighting
the
potential
application
in
food
spoilage
detection.
Advanced Sensor Research,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 2, 2025
Abstract
Advancements
in
sensor
technologies
capable
of
measuring
key
biomarkers
can
greatly
enhance
medical
diagnostics
and
health
monitoring,
facilitating
more
effective
diagnosis,
treatment,
prevention.
While
there
are
numerous
interest,
gaseous
ammonia
(NH
3
)
stands
out
due
to
its
significance
as
an
indicator
organ
function
(e.g.,
liver
kidney
failure)
or
bacterial
infections
Helicobacter
pylori
,
Proteus
mirabilis
the
body.
This
review
discusses
metabolism
presence
NH
body
organs,
well
clinical
conditions
associated
with
regulation
concentrations.
paper
reviews
various
sensing
materials
parameters,
along
current
state‐of‐the‐art
gas
sensors
detecting
for
biomedical
applications.
Additionally,
it
addresses
challenges
faced
by
already
use
highlights
that
while
applications
breath
analysis
well‐developed,
vivo
remains
early
stages
faces
significant
challenges.
Finally,
promising
future
research
directions
discussed,
including
integration
catheters
Simulator
Human
Intestinal
Microbial
Ecosystem,
detection
antibiotic‐resistant
bacteria
diagnostics.
Chemical Communications,
Год журнала:
2023,
Номер
59(18), С. 2636 - 2639
Опубликована: Янв. 1, 2023
Here,
we
demonstrate
a
new
electrochemical
sensing
mechanism
of
ammonium
ions
(NH4+)
involving
two-electron
oxygen
reduction
reaction
(ORR)
and
hydrazine
reaction.
The
NH4+
are
electrooxidized
to
by
H2O2
derived
from
the
ORR
over
self-supporting
Ag/TiO2
nanotube
array
composite
electrode
modified
hematite
(Ag/Fe2O3/TNTs).
Ag/Fe2O3/TNT
sensor
exhibits
high
sensitivity
1876
µA
mM-1
cm-2
with
detection
limit
0.18
µM
under
non-alkaline
conditions,
short
response
time
3
s,
good
reproducibility,
fine
selectivity
among
various
interferents,
is
also
successfully
used
in
real
water
bodies
display
accuracy.
Furthermore,
this
has
certain
universality
range
Ag
(main
catalyst)/transition
metal
oxide
(cocatalyst)/TNT
systems.
This
work
offers
design
basis
for
urgently
needed
ammonia
nitrogen
sensors.
