Graphene
quantum
dots
(GQDs)
prepared
by
the
top-down
route
have
promising
applications
in
chemical
sensing
and
biosensing
for
their
easy
preparation,
strong
electrochemiluminescence
(ECL),
low
cytotoxicity,
labeling,
favorable
biocompatibility.
However,
extraordinary
water
solubility
of
GQDs
results
poor
immobilization
on
interfaces
then
sensitivity
stability,
which
limit
extensive
applications.
In
order
to
solve
problem
improve
performances,
we
situ
loaded
single-layered
onto
multiwalled
carbon
nanorings
(MWCNRs)
a
simple
one-step
acid
treatment
raw
single-walled
nanotubes
(SWCNTs)
with
side
products
MWCNRs.
It
is
first
time
that
large
number
MWCNRs
well
crystallization
nanostructures,
good
electroconductivity,
excellent
stability
were
found
SWCNTs
applied
ECL
sensing.
During
HNO3-treatment
(nanohybrids
SWCNTs/MWCNRs),
component
SWCNT
was
oxidized
into
GQDs,
while
MWCNR
essentially
kept
unchanged.
The
resultant
stably
immobilized
surfaces
acid-enhanced
π-π
stacking
interactions,
absence
electrostatic
repulsion.
synthesized
MWCNRs@GQDs
exhibit
stable
activity
interface
show
immunoassay
biomarkers,
such
as
human
chorionic
gonadotropin.
Nano-Micro Letters,
Год журнала:
2025,
Номер
17(1)
Опубликована: Май 21, 2025
Abstract
Nickel-based
cathodes
in
aqueous
nickel-zinc
batteries
typically
suffer
from
sluggish
reaction
kinetics
and
limited
energy
density.
In
situ
introduction
of
metal
phosphides
rational
construction
heterostructures
can
effectively
promote
electron/ion
transport.
However,
the
complex
evolution
phosphidation
intractable
phosphidizing
degree
greatly
affect
composition
active
phase,
sites,
charge
transfer
rate,
ion
adsorption
strength
cathodes.
Herein,
critical
bimetallic
phosphide
layer
(CBPL)
is
constructed
on
NiCo-layered
double
hydroxide
(NiCo-LDH)
skeleton
by
a
controllable
anion-exchange
strategy,
yielding
novel
nanohybrid
cathode
(NiCo-P1.0,
1.0
representing
mass
ratio
Na
2
H
PO
to
NiCo-LDH).
The
high-conductivity
CBPL
with
inner
NiCo-LDH
forms
extensive
heterostructures,
regulating
electronic
structure
via
transfer,
thereby
improving
electrical
conductivity.
Remarkably,
exhibits
unexpected
electrochemical
activity
synergizes
for
electrode
reactions,
ultimately
delivering
extra
energy.
Benefiting
bifunctional
CBPL,
NiCo-P1.0
delivers
an
optimal
capacity
286.64
mAh
g
−1
at
1C
(1C
=
289
)
superb
rate
performance
(a
retention
72.22%
40C).
assembled
NiCo-P1.0//Zn
battery
achieves
ultrahigh
energy/power
density
(503.62
Wh
kg
/18.62
kW
,
based
loading
material
cathode),
flexible
quasi-solid-state
pouch
cell
validates
its
practicality.
This
work
demonstrates
superiority
surface
modification,
providing
effective
scalable
compositing
strategy
achieving
high-performance
batteries.
Graphene
quantum
dots
(GQDs)
prepared
by
the
top-down
route
have
promising
applications
in
chemical
sensing
and
biosensing
for
their
easy
preparation,
strong
electrochemiluminescence
(ECL),
low
cytotoxicity,
labeling,
favorable
biocompatibility.
However,
extraordinary
water
solubility
of
GQDs
results
poor
immobilization
on
interfaces
then
sensitivity
stability,
which
limit
extensive
applications.
In
order
to
solve
problem
improve
performances,
we
situ
loaded
single-layered
onto
multiwalled
carbon
nanorings
(MWCNRs)
a
simple
one-step
acid
treatment
raw
single-walled
nanotubes
(SWCNTs)
with
side
products
MWCNRs.
It
is
first
time
that
large
number
MWCNRs
well
crystallization
nanostructures,
good
electroconductivity,
excellent
stability
were
found
SWCNTs
applied
ECL
sensing.
During
HNO3-treatment
(nanohybrids
SWCNTs/MWCNRs),
component
SWCNT
was
oxidized
into
GQDs,
while
MWCNR
essentially
kept
unchanged.
The
resultant
stably
immobilized
surfaces
acid-enhanced
π-π
stacking
interactions,
absence
electrostatic
repulsion.
synthesized
MWCNRs@GQDs
exhibit
stable
activity
interface
show
immunoassay
biomarkers,
such
as
human
chorionic
gonadotropin.
