Gold
nanoparticles
(AuNPs)
exhibit
excellent
catalytic
activity
in
reducing
4-NP
into
4-AP
by
NaBH4.
Nonetheless,
AuNPs
are
ready
to
aggregate
due
high
surface
energy.
When
connecting
the
carrier,
show
improved
stability
and
reusability.
Furthermore,
a
green
regenerative
system
could
be
achieved
if
were
combined
with
carrier
reversible
manner.
Here
this
work,
azobenzene
(Azo)
modified
Fe3O4
was
employed
as
magnetic
load
β-Cyclodextrin
(β-CD)
AuNPs.
By
multivalent
host
guest
binding
of
linker
Azo@β-CD
formed
by,
recyclable
photo-regeneratable
catalyst
Fe3O4@IPTS-Azo@βCD-AuNPs
(IPTS
refers
(3-isocyanoisopropyl)
triethoxysilane)
developed.
Through
photo-induced
Azo
trans-cis
or
cis-trans
isomerization,
situ
removed
from
reloaded
onto
UV
irradiation
visible
light
irradiation,
respectively,
via
switching
host-guest
behavior
photo-responsive
Azo@β-CD.
The
microstructure
prepared
characterized
using
HR-TEM,
SEM,
EDS,
UV-vis,
XRD,
FT-IR,
1H-NMR
XPS.
synthesized
βCD-AuNPs
8.56
nm
size
on
average,
crystal
structure
validated
HR-TEM
XRD.
clearance
rate
reaches
99%
5
minutes
constant
(k)
0.3001
min-1
(298
K).
AuNPs,
both
15th
recycled
8th
photo-regenerated
composite
catalysts,
exhibited
efficiency
nitroaromatic
pollutant
4-NP.
This
work
presents
pathway
achieve
sustainable
technology
intoxicating
aqueous
pollutants
efficiently.
Carbohydrate Polymers,
Journal Year:
2023,
Volume and Issue:
321, P. 121284 - 121284
Published: Aug. 14, 2023
Polysaccharide-based
gold
nanomaterials
have
attracted
great
interest
in
biomedical
fields
such
as
cancer
therapy
and
immunomodulation
due
to
their
prolonged
residence
time
vivo
enhanced
immune
response.
This
review
aims
provide
an
up-to-date
comprehensive
summary
of
polysaccharide-based
Au
NMs
synthesis,
including
mechanisms,
polysaccharide
structure-effects,
anticancer
activity.
Firstly,
research
progress
on
the
synthesis
mechanism
was
addressed,
which
included
three
types
based
variety
polysaccharides
reaction
environment:
breaking
glycosidic
bonds
via
(III)
or
base-mediated
production
highly
reduced
intermediates,
reduction
free
hydroxyl
groups
molecules,
amino
molecules.
Then,
potential
effects
structure
characteristics
(molecular
weight,
composition
monosaccharides,
functional
groups,
bonds,
chain
conformation)
conditions
(the
temperature,
time,
pH,
concentration
precursor
polysaccharides)
size
shape
were
explored.
Finally,
current
status
summarized
before
reaching
our
conclusions
perspectives.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 16, 2024
Abstract
Decorating
cellulose
nanocrystals(CNC)
with
nanoparticles(NPs)
allows
to
engineer
novel
CNC/NPs
composites
for
advanced
technologies
and
applications.
NPs
are
well‐known
their
unique
highly
efficient
properties.
However,
present
challenges
limitations
due
aggregation,
non‐uniform
growth,
size
distribution,
nanotoxicity.
CNC
surface
overcomes
most
of
these
drawbacks
by
providing
an
attractive
matrix/template
grow
desirable
morphology,
functionality.
has
distinctive
properties
such
as
biodegradability,
high
area,
low
cost,
good
mechanical
strength,
functionality,
chiral
nematic
self‐assembly.
combine
the
both
NPs.
This
review
highlights
characteristics
CNC,
NPs,
energy,
catalysis,
biomedical
First,
different
production
methods
effect
on
crystallinity
index,
yield
presented.
Both
organic
inorganic
used
decorate
either
a
pristine
or
functionalized
surface.
In
situ
nucleation
growth
compared
direct
incorporation
pre‐formed
Applications
reviewed
energy
storage
material,
conductive
materials,
catalysts,
antibacterial
agents,
biosensors,
bioimaging.
Finally,
current
perspectives
presented
unleashing
new
possibilities
in
developing
functional
CNC‐NPs
composites.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(4), P. 1468 - 1479
Published: Jan. 18, 2024
The
conventional
fabrication
of
photothermally
active
materials
involves
expensive,
time-consuming,
or
environmentally
hazardous
processes.
A
scalable
and
benign
free-standing
photothermal
through
2D
printing
is
obtained
using
cellulose
nanocrystal
(CNC)
aqueous
shear-thinning
inks
containing
plasmonic
nanoparticles.
Polyvinylpyrrolidone
was
used
to
stabilize
14.7
±
1.1
nm
spherical
AuNPs
for
enhanced
compatibility
with
CNCs.
resulting
inks,
1
wt
%
CNCs,
were
shaped
into
∼100
μm-thick
lines,
where
CNC
colloidal
stability
ensured
homogeneous
AuNP
distribution
within
the
printed
materials.
suitability
applications
demonstrated
by
a
temperature
increase
12
°C
after
exposure
λ
=
520–525
light
over
areas
5
×
cm2.
Importantly,
nondegradable
synthetic
petroleum-based
polymers
multicomponent
nanomaterials
serious
environmental
burdens
are
avoided.
Printed
show
remarkable
durability
as
evidenced
stable
photothermia
16
h
irradiation
no
loss
immersion
in
stirring
water
week.
Besides,
given
nontoxicity
prepared
materials,
they
may
be
disposed
at
end
their
service
life
negligible
impact.
Therefore,
this
work
provides
cues
develop
friendly
microdevices
that
balance
performance,
material
renewability,
ease
processing,
degradability.
ACS Omega,
Journal Year:
2024,
Volume and Issue:
9(8), P. 8789 - 8796
Published: Feb. 14, 2024
In
this
study,
we
successfully
synthesized
well-defined
polygonal
gold
microplates
for
the
first
time
in
an
aqueous
phase
using
hydroxyethylcellulose
(HEC)
presence
of
hydrogen
peroxide
(H2O2).
HEC
played
a
pivotal
role
during
synthesis,
acting
not
only
as
biotemplate
but
also
situ
reduction
site
nucleation
and
growth
(Au)
microplates.
H2O2
crucial
accelerating
Au
from
nucleus.
This
methodology
is
ecofriendly
easy
to
operate
has
potential
applications
various
fields,
such
electronics,
photonics,
biotechnology.
