ChemNanoMat,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 22, 2024
Abstract
The
synthesis
of
a
nanocomposite
material
consisting
Cu
nanoparticles
encapsulated
in
halloysite
nanotubes
(Cu@Hal)
was
achieved
by
the
reduction
Cu(NO
3
)
2
⋅
3H
O
with
sodium
ascorbate/sodium
borohydride
an
aqueous
suspension
trisodium
citrate
and
halloysite.
found
to
be
effective
heterogeneous
catalyst
for
multicomponent
copper
catalyzed
azide‐alkyne
cycloaddition
reaction
(CuAAC).
A
variety
terminal
alkynes
reacted
benzyl
halides
azide
presence
Cu@Hal
water.
In
situ
formation
organic
azides
afforded
corresponding
1,4‐disubstituted
1,2,3‐triazoles
regioselectivily,
excellent
yields.
easily
recovered
recycled
without
loss
activity
low
metal
leaching.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(14), P. 5716 - 5725
Published: March 27, 2024
Exploring
the
"on–off"
control
of
hydrogen
release
remains
a
critical
issue
for
efficiently
on-demand
utilization
energy.
In
this
work,
new
storage
strategy
loading
ammonia
borane
(AB)
solid
and
metal
catalyst
Co
in
halloysite
nanotube
aerogel
(AB@Co/HNTA)
is
proposed
controlled
from
AB
hydrolysis
by
controlling
added
water.
The
results
show
that
nanoparticles
with
size
3.07
nm
are
uniformly
distributed
on
HNTA
surface,
can
be
packaged
into
to
form
bulk
composite.
Controlled
generation
achieved
AB@Co/HNTA
system,
which
turned
off
amount
water
aerogel.
Further,
decorated
(Co/HNTA)
reused
encapsulate
next
run
after
complete
hydrolysis.
This
work
provides
approach
application
field
"on-board"
device,
solid-system
hydrolytic
extended
any
other
porous
material
loaded
catalysts.
Nano Letters,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 9, 2024
Optimizing
the
local
electronic
structure
of
a
single-atom
catalyst
(SAC)
is
crucial
for
efficient
photocatalytic
hydrogen
evolution
reactions.
This
study
synthesized
Co-P
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 7, 2024
Abstract
Self‐assembling
of
very
long
natural
clay
nanotubes
represents
a
powerful
strategy
to
fabricate
thermo‐stable
inorganic
thin
films
suitable
for
environmental
applications.
In
this
work,
self‐standing
with
variable
thicknesses
(from
60
300
µm)
are
prepared
by
the
entanglement
20–30
µm
length
Patch
halloysite
(PT_Hal),
which
interconnect
into
fibrosus
structures.
The
thickness
is
crucial
confer
specific
properties
like
transparency,
mechanical
resistance,
and
water
uptake.
Despite
its
completely
composition,
thickest
nanoclay
film
possesses
elasticity
comparable
polymeric
materials
as
evidenced
Young's
modulus
(ca.
1710
MPa).
All
PT_Hal‐based
fire
resistant
stable
under
high
temperature
conditions
preventing
flame
propagation.
After
their
direct
exposure,
produced
do
not
show
neither
deterioration
effects
nor
macroscopic
alterations.
PT_Hal
employed
precursors
development
functional
alkaline
activation
thermal
treatment,
generate
highly
porous
geopolymers
or
ceramics
compact
morphology.
Due
porosity,
geopolymer
can
be
promising
CO
2
capture.
As
compared
corresponding
film,
adsorption
efficiency
doubled
geopolymeric
highlighting
potential
use
sorbent.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
unknown, P. 18167 - 18203
Published: Nov. 24, 2024
Halloysite
clay
nanotubes
(HNTs)
are
emerging
nanomaterials
for
numerous
environmental
applications,
including
catalysis
and
biomass
valorization.
The
efficacy
of
halloysite
as
a
nanoplatform
the
catalytic
conversion
can
be
accurately
evaluated
by
combined
approaches
based
on
experimental
investigations
computational
modeling.
Recently,
many
efforts
have
been
made
to
properly
describe
most
peculiar
features
focusing
its
structural
interfacial
through
studies,
which
challenging
natural
nanoparticles
yet
crucial
design
novel
catalysts
exploited
in
conversion.
Within
this
framework,
review
critically
extensively
discusses
recent
advancements
related
use
different
processes,
such
enzymatic
reactions,
precious-
nonprecious-metal-
alloy-catalyzed
acid-activated
mechanisms.
research
gap
modeling
chemical
occurring
surfaces
is
highlighted
throughout
review,
together
with
latest
achievements.
To
optimize
efficiency
halloysite-based
materials
valorization,
future
should
focus
implementation
data
calculations
provided
proper
models
synergistic
approach.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(13), P. 7679 - 7690
Published: June 29, 2024
Within
the
cultural
heritage
field,
colloidal
systems
based
on
ecofriendly
products
represent
alternatives
to
toxic
solvents
as
cleaners
for
surface
artworks.
In
this
paper,
we
developed
an
innovative
protocol
prepare
a
Pickering
emulsion
gel
Funori
biopolymer,
halloysite
clay
nanotubes
(HNTs),
and
isooctane
confined
oil
phase.
The
filling
of
droplets
within
network
might
reduce
amounts
hydrocarbons
necessary
cleaning
applications.
Moreover,
specific
interactions
between
biopolymer
stabilized
could
increase
stability
emulsions
favor
removal
efficiency
toward
hydrophobic
contaminants.
First,
optimized
preparation
in
aqueous
media
by
addition
variable
Ba2+
ions
cross-linkers.
To
purpose,
studied
cross-linking
process
investigation
rheological
properties
gelation
kinetics.
Then,
prepared
hybrid
HNTs
achieve
sustainable
materials
with
microdomains
that
are
useful
We
investigated
properties,
which
were
strictly
correlated
Funori/halloysite
interactions.
peculiar
effects
assessed
studying
energetics
detaching
at
isooctane/water
interface.
Remarkably,
presence
enhanced
interfacial
activity
and,
consequently,
emulsion.
Finally,
explored
Regalrez
1126,
is
contaminant
can
be
found
both
contact
angle
measurements
optical
investigations
revealed
complete
1126
from
after
2
min
application.
Further
tests
real
artwork
(an
canvas
coming
private
collection)
confirmed
suitability
Funori/HNTs/isooctane
restoration
purposes.
