Langmuir,
Journal Year:
2023,
Volume and Issue:
39(22), P. 7707 - 7722
Published: May 22, 2023
The
fabrication
of
defect
rich
S-scheme
binary
heterojunction
system
with
enhanced
space
charge
separation
and
mobilization
is
a
pioneering
approach
for
improving
photoreduction
efficiency
towards
the
production
value
added
chemicals.
Herein,
we
have
rationally
fabricated
an
atomic
sulfur
defect-rich
hierarchical
UiO-66(-NH2)/CuInS2
n-p
by
uniform
dispersion
UiO-66(-NH2)
(UN66)
nanoparticles
over
surface
CuInS2
nanosheets
under
mild
conditions.
designed
heterostructures
are
characterized
using
different
structural,
microscopic,
spectroscopic
techniques.
(CIS)
component
shows
defects
leading
to
creation
more
exposed
active
sites
improved
absorption
visible
light
augmented
diffusion
carriers.
photocatalytic
performance
prepared
materials
explored
N2
fixation
O2
reduction
reactions
(ORR).
optimal
UN66/CIS20
heterostructure
photocatalyst
exhibited
outstanding
performances
yields
398
4073
μmol
g-1
h-1
illumination,
respectively.
An
migration
pathway
coupled
radical
generation
ability
accounted
superior
H2O2
activity.
This
research
work
furnishes
new
perspective
on
synergistic
effect
vacancy
toward
NH3
vacancy-rich
photocatalyst.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(7), P. 7365 - 7380
Published: April 2, 2024
In
this
study,
a
nonstoichiometric
roxbyite
(Cu58S32)
phase
with
nanoplate
(np)
and
snowflake
(sf)
morphologies
was
prepared
under
solvothermal
conditions
by
varying
the
sulfur
source.
The
Cu58S32
(CS)
subsequently
used
as
host
matrix
well
copper
source
for
in
situ
construction
of
Cu-BDC-NH2/Cu58S32
(CSM)
nanohybrid
materials.
regulated
growth
Cu-MOF
nanoplates
over
well-crystalline
radially
symmetric
hexagonal
dendritic
structure
led
to
formation
an
n–p
heterojunction
large
interfacial
contact
area.
Comprehensive
characterizations
nanohybrids
unveiled
improved
light
harvesting
properties,
electrochemically
active
surface
areas,
synergistic
charge
mobilization
between
constituent
semiconductor
surface-aligned
ultrathin
nanosheets
contained
three
distinct
types
coordinated
metal
sites
involving
Cu(II)
dimers
paddle
wheel
monomeric
distorted
ligand
environment.
optimal
CSM(sf)
hybrid
displayed
photocatalytic
activity
toward
H2
evolution
(9343
μmol
g–1
h–1)
O2
reduction
(2339
solar
simulation
reaction
rates
14–20
times
greater
than
pure
semiconductors.
strong
hydrophilic
character,
morphology,
high
redox
ability
photogenerated
electrons
through
S-scheme
transfer
mechanism
accounted
ACS Applied Engineering Materials,
Journal Year:
2024,
Volume and Issue:
2(1), P. 179 - 194
Published: Jan. 17, 2024
In
this
work,
a
hierarchical
Ag/Sr6Bi2O9-α-Bi2O3
(Ag/SBO-BO)
ternary
heterostructure
photocatalyst
was
fabricated
by
an
MOF-derived
route
and
studied
for
aqueous-phase
micropollutant
remediation
inactivation
of
water
pathogens.
The
as-synthesized
composite
inherited
the
cuboidal-rod
shape
morphology
pristine
Bi-MOF
with
internal
hollow
structure.
Ag
nanodots
(3–5
nm)
were
preferentially
decorated
over
planar
surface
high-aspect-ratio
Sr6Bi2O9
nanosheets,
which
epitaxially
grown
porous
Bi2O3
(BO)-microrods.
Ag/SBO-BO
displayed
important
structural
attributes
including
anionic
vacancies
formation
tight
heterojunction
between
Sr6Bi2O9/Bi2O3
(SBO-BO)
phases,
endowed
superior
optical
absorption,
synergistic
charge
channelization,
higher
photoexcited
state
lifetimes.
improved
optoelectronic
features
successfully
exploited
enhanced
photocatalytic
antibiotic
degradation
(ciprofloxacin,
k
=
0.0116
min–1),
heavy-metal
reduction
(Cr6+,
0.0752
pathogens
(Vibrio
cholerae,
96.5%
in
40
min).
biocompatible
nature
also
ascertained
from
hemagglutination
study.
An
S-scheme
transfer
mechanism
promoted
plasmonic
hot
electron
injection
coupled
robust
•OH
radical
generation
ability
accounted
observed
photoantibacterial
activity
composite.
