ACS Energy Letters,
Год журнала:
2023,
Номер
8(4), С. 1744 - 1751
Опубликована: Март 13, 2023
MnO2
is
a
versatile,
cost-effective
transition
metal
oxide
that
has
attracted
interest
in
multiple
domains,
including
as
an
active
cathode
material
or
catalyst
for
electrochemical
energy
storage
batteries.
Hydrothermal
methods
are
among
the
most
efficient
approaches
synthesis.
These
enable
facile,
versatile
production
of
any
its
crystalline
phases
(α,
β,
δ,
etc.),
with
dominant
product
being
determined
by
reaction
conditions
such
precursor
concentration
and
temperature.
benefits
unfortunately
come
impractically
low
yields
(∼9%)
long
times.
Here,
we
report
low-molecular
weight,
water-soluble
polymers
function
effective
nucleating
agents
hydrothermal
synthesis
MnO2.
For
fundamental
reasons,
these
also
reported
to
promote
large
(10-
40-fold)
increases
rate
yield.
We
evaluate
physical
crystallographic
features
synthesized
find
depending
upon
conditions,
polymer-assisted
dominantly
δ-MnO2
β-MnO2.
The
as-prepared
materials
extra
interlayer
water
studied
electrodes
aqueous
Zn-ion
battery
applications
shown
support
long-duration
at
both
moderate
high
rates.
Energy & Environmental Science,
Год журнала:
2021,
Номер
15(2), С. 499 - 528
Опубликована: Дек. 21, 2021
This
review
gives
a
comprehensive
introduction
of
the
solvation
structure
regulation
strategies
for
dendrite-free
and
side
reaction-suppressed
zinc-ion
batteries,
further
proposes
potential
directions
perspectives
research.
Advanced Functional Materials,
Год журнала:
2021,
Номер
31(30)
Опубликована: Май 18, 2021
Abstract
Skin
effect
and
high
density
are
the
main
reasons
that
restrict
search
of
lightweight
high‐performance
metal‐based
electromagnetic
(EM)
wave
absorbing
materials.
Although
nanostructured
metal
materials
have
been
fabricated
to
solve
above
problems,
poor
dispersibility
chemical
stability
issues
brought
about
by
surface
energy
due
existing
nano‐size
effect.
In
this
work,
Ni
foam
with
NiO/NiFe
2
O
4
in
situ
growth
composites
a
facile
universal
route
as
an
effective
alternative
EM
absorber.
Impressively,
it
is
found
structure
/Ni
components
can
synergistically
boost
absorption
capacity.
detail,
impedance
matching
from
dissipation
interfacial
polarization
defect
induced
provided
mainly
contributes
its
ultra‐broadband
performance.
As
result,
as‐prepared
sample
(0.06
g·cm
−3
)
delivers
wide
bandwidth
14.24
GHz
thin
thickness
0.6
mm,
well
as,
specific
19444.4
GHz·g
−1
·cm
−2
.
This
work
sheds
light
on
novel
view
synergistic
behaviors
demonstrates
new
pathway
for
preparation
absorbers.
Environmental Science & Technology,
Год журнала:
2021,
Номер
55(8), С. 4268 - 4286
Опубликована: Март 15, 2021
Volatile
organic
compounds
(VOCs)
are
one
of
the
main
sources
air
pollution,
which
wide
concern
because
their
toxicity
and
serious
threat
to
environment
human
health.
Catalytic
oxidation
has
been
proven
be
a
promising
effective
technology
for
VOCs
abatement
in
presence
heat
or
light.
As
environmentally
friendly
low-cost
materials,
manganese-based
oxides
most
competitive
candidates
catalytic
degradation
thermocatalysis
photo/thermocatalysis.
This
article
summarizes
research
development
on
various
oxide
catalysts,
with
emphasis
thermocatalytic
photo/thermocatalytic
purification
recent
years
detail.
Single
manganese
oxides,
composites,
as
well
improving
strategies
such
morphology
regulation,
heterojunction
engineering,
surface
decoration
by
metal
doping
universal
acid
treatment
reviewed.
Besides,
monoliths
practical
abatementare
also
discussed.
Meanwhile,
relevant
mechanisms
summarized.
Finally,
existing
problems
prospect
catalysts
catalyzing
combustion
proposed.
As
a
fascinating
visible-light-responsive
photocatalyst,
zinc
indium
sulfide
(ZnIn2
S4
)
has
attracted
extensive
interdisciplinary
interest
and
is
expected
to
become
new
research
hotspot
in
the
near
future,
due
its
nontoxicity,
suitable
band
gap,
high
physicochemical
stability
durability,
ease
of
synthesis,
appealing
catalytic
activity.
This
review
provides
an
overview
on
recent
advances
ZnIn2
-based
photocatalysts.
First,
crystal
structures
are
briefly
introduced.
Then,
various
modulation
strategies
outlined
for
better
photocatalytic
performance,
which
includes
morphology
structure
engineering,
vacancy
doping
hydrogenation
construction
composites.
Thereafter,
potential
applications
energy
environmental
area
photocatalysts
summarized.
Finally,
some
personal
perspectives
about
promises
prospects
this
emerging
material
provided.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(13)
Опубликована: Янв. 3, 2023
Abstract
Two‐dimensional
(2D)
transition
metal
dichalcogenides
(TMDs),
a
rising
star
in
the
post‐graphene
era,
are
fundamentally
and
technologically
intriguing
for
photocatalysis.
Their
extraordinary
electronic,
optical,
chemical
properties
endow
them
as
promising
materials
effectively
harvesting
light
catalyzing
redox
reaction
Here,
we
present
tutorial‐style
review
of
field
2D
TMDs
photocatalysis
to
educate
researchers
(especially
new‐comers),
which
begins
with
brief
introduction
fundamentals
along
synthesis
this
type
material,
then
look
deeply
into
merits
co‐catalysts
active
photocatalysts,
followed
by
an
overview
challenges
corresponding
strategies
photocatalysis,
finally
ahead
topic.
Abstract
Aqueous
Mn
2+
/MnO
2
‐based
batteries
have
attracted
enormous
attentions
in
aqueous
energy
storage
fields,
owing
to
their
high
working
voltage
and
theoretical
capacity
(616
mAh
g
−1
)
brought
by
the
two‐electron
reaction
(Mn
/Mn
4+
).
However,
there
are
currently
several
tricky
challenges
facing
batteries:
complicated
mechanisms,
existing
issues,
optimization
strategies.
This
Perspective
aims
provide
a
mechanistic
understanding
an
overview
of
insufficiency,
optimization,
future
development
for
batteries.
The
issues
deficiency
been
systematically
analyzed,
strategies
also
rationally
summarized
discussed
with
deep
insights.
Also,
often‐overlooked
optimized
objects
aspects
highlighted
unique
perspectives.
proposals
testing
methods
performance
assessment
presented,
containing
different
degradation
mechanisms.
Based
on
above
points,
this
will
guidance
contribute
further
ACS Nano,
Год журнала:
2021,
Номер
15(6), С. 10597 - 10608
Опубликована: Май 26, 2021
The
booming
market
of
portable
and
wearable
electronics
has
aroused
the
requests
for
advanced
flexible
self-powered
energy
systems
featuring
both
excellent
performance
high
safety.
Herein,
we
report
a
safe,
flexible,
wristband
system
by
integrating
high-performance
zinc-ion
batteries
(ZIBs)
with
perovskite
solar
cells
(PSCs).
ZIBs
were
first
fabricated
on
basis
defective
MnO2–x
nanosheet-grown
carbon
cloth
(MnO2–x@CC),
which
was
obtained
via
simple
lithium
treatment
MnO2
nanosheets
to
slightly
expand
interlayer
spacing
generate
rich
oxygen
vacancies.
When
used
as
ZIB
cathode,
MnO2–x@CC
ultrahigh
mass
loading
(up
25.5
mg
cm–2)
exhibits
much
enhanced
specific
capacity
(3.63
mAh
cm–2
at
current
density
3.93
mA
cm–2),
rate
performance,
long
cycle
stability
(no
obvious
degradation
after
5000
cycles)
than
those
MnO2@CC.
Importantly,
MnO2–x@CC-based
quasi-solid-state
not
only
achieves
flexibility
an
5.11
mWh
(59.42
cm–3)
but
also
presents
safety
under
wide
temperature
range
various
severe
conditions.
More
importantly,
can
be
integrated
PSCs
construct
wristband,
is
able
harvest
light
power
commercial
smart
bracelet.
This
work
sheds
development
cathodes
thus
offers
good
strategy
electronics.
Nanoscale,
Год журнала:
2021,
Номер
13(42), С. 17687 - 17724
Опубликована: Янв. 1, 2021
The
primitive
and
advanced
approaches
for
the
synthesis
of
various
Bi
2
O
3
polymorphs
photocatalytic
applications
are
reviewed.
temperature-dependent
phase
transformation,
morphology,
junction
in
phases
presented.
