Open Chemistry,
Journal Year:
2024,
Volume and Issue:
22(1)
Published: Jan. 1, 2024
Abstract
Mercury
ions
represent
hazardous
contaminants
with
significant
adverse
effects
on
human
health,
wildlife,
and
vegetation.
Therefore,
it
is
crucial
to
create
a
sensitive
trustworthy
technique
for
identifying
mercury
ions.
In
this
study,
nitrogen
boron
co-doped
carbon
dots
(N,B-CDs)
were
created
via
one-step
hydrothermal
approach,
employing
citric
acid,
polyethyleneimine,
boric
as
precursors.
The
resulting
N,B-CDs
exhibited
spherical
morphology
an
average
diameter
of
2.60
nm
emitted
blue
fluorescence
peak
emissions
at
442
(
λ
em
)
upon
excitation
360
ex
),
yielding
quantum
yield
27.34%.
Remarkably,
N,B-CDs,
without
any
surface
modifications,
functioned
direct
“turn-off”
probe,
enabling
swift,
highly
selective
Hg
2+
detection.
probe
could
measure
in
the
linear
ranges
0.40–22
μM
22–208
,
detection
limit
0.12
μM.
mechanism
was
attributed
dynamic
quenching
interactions
between
.
Additionally,
used
detect
both
tap
river
water,
recovery
rates
ranged
from
87.20
108.20%
(RSD
<4.89%).
These
findings
highlighted
method’s
considerable
practical
potential
detecting
environmental
water.
RSC Advances,
Journal Year:
2025,
Volume and Issue:
15(9), P. 6962 - 6973
Published: Jan. 1, 2025
The
leaching
of
aluminum
and
cobalt
ions
into
canned
foods,
such
as
from
tomato
sauce
tuna,
raises
concerns
about
potential
health
risks,
making
their
accurate
detection
essential
for
food
safety.
In
this
study,
we
developed
a
novel
ratiometric
fluorometric
sensor
based
on
dual-emission
carbon
dots
capable
selectively
detecting
(Al3+)
(Co2+)
after
single
excitation.
exhibits
distinct
fluorescence
responses:
enhance
the
emission
at
403
nm
due
to
interactions
with
nitrogen
sulfur
groups
dot
surface,
while
Al3+
532
through
binding
oxygen-rich
carboxyl
hydroxyl.
This
differential
response
stems
varying
affinities
these
metal
different
functional
groups,
confirmed
mechanistic
studies
comprehensive
characterization
dots,
including
TEM,
UV-Vis,
FTIR,
lifetime
analyses.
method
demonstrates
excellent
sensitivity,
limits
(LOD)
0.012
μM
Co2+
0.06
Al3+.
sensor's
performance
was
validated
real
samples,
successfully
determining
in
tuna.
exhibited
high
selectivity
minimal
interference,
achieving
recovery
rates
97.50-100.67%
97.01-98.02%
Co2+.
These
findings
underscore
robustness
practical
applicability
proposed
reliable
tool
monitoring
ensuring
safety
compliance
regulatory
standards.
