ACS Omega,
Journal Year:
2022,
Volume and Issue:
7(29), P. 25066 - 25077
Published: July 11, 2022
With
the
rapid
industrial
development,
coexistence
of
multiple
pollutants
in
wastewater
has
become
a
common
phenomenon.
Thus,
developing
highly
efficient
decontamination
methods
is
imperative.
In
this
work,
string
UiO-66-NH2/BiOBr
heterojunctions
with
varying
ratios
BiOBr
were
prepared
and
applied
to
remove
hexavalent
chromium
Cr(VI)
rhodamine
B
(RhB).
The
possible
growth
process
nanosheets
on
UiO-66-NH2,
removal
activity
contaminants,
photocatalysis
mechanism
investigated.
When
mass
ratio
UiO-66-NH2
reaches
1:0.75,
heterojunction
(NB-75)
shows
optimal
photocatalytic
activity.
After
30
min
adsorption,
total
rates
(50
mg/L)
RhB
(10
over
NB-75
(0.25
g/L)
96.7%
within
120
illumination
98.9%
80
illumination,
respectively.
For
process,
there
are
two
factors.
first
high
adsorption
capacity
for
owing
porosity
interlayer
surface
positive
charge
BiOBr.
second
improved
visible-light
performance
via
separation
photoinduced
carriers.
addition,
active
species
capture
study
reveals
that
electrons
(e-)
superoxide
radicals
(•O2-)
play
key
roles
reduction,
while
holes
(h+)
major
reactive
groups
participating
degradation
RhB.
This
work
demonstrated
kind
promising
MOF-based
material
eliminating
simultaneously.
Accounts of Chemical Research,
Journal Year:
2022,
Volume and Issue:
55(20), P. 2978 - 2997
Published: Sept. 26, 2022
ConspectusThe
continuing
increase
of
the
concentration
atmospheric
CO2
has
caused
many
environmental
issues
including
climate
change.
Catalytic
conversion
using
thermochemical,
electrochemical,
and
photochemical
methods
is
a
potential
technique
to
decrease
simultaneously
obtain
value-added
chemicals.
Due
high
energy
barrier
however,
this
method
still
far
from
large-scale
applications
which
requires
activity,
selectivity,
stability.
Therefore,
development
efficient
catalysts
convert
different
products
urgent.
With
their
well-engineered
pores
chemical
compositions,
surface
area,
elevated
adsorption
capability,
adjustable
active
sites,
porous
crystalline
frameworks
metal-organic
(MOFs)
covalent
organic
(COFs)
are
materials
for
catalytic
conversion.
Here,
we
summarize
our
recent
work
on
MOFs
COFs
thermocatalytic,
electrocatalytic,
photocatalytic
describe
structure-activity
relationships
that
could
guide
design
effective
catalysts.The
first
section
paper
describes
imidazolium-functionalized
MOFs,
liquid
cationic
with
nucleophilic
halogen
ions,
can
promote
thermocatalytically
cycloaddition
reaction
epoxides
toward
cyclic
carbonates
at
one
bar
pressure.
A
MOF
takes
role
reservoir
tackle
low
local
concentrations
in
gas-liquid-solid
heterogeneous
reactions.
Imidazolium-functionalized
ions
avoid
use
cocatalysts,
leads
milder
more
facile
experimental
conditions
separation
processes.In
dealing
electrocatalytic
reduction
(CO2RR),
developed
series
conductive
framework
fast
electron
transmission
capabilities,
afford
current
densities
outperform
traditional
COF
have
been
reported.
The
intrinsically
two-dimensional
2D
nanosheets
based
fully
π-conjugated
phthalocyanine
motif
excellent
transport
capability
were
prepared,
strong
transporters
also
integrated
into
metalloporphyrin-based
CO2RR.
Cu2O
quantum
dots
Cu
nanoparticles
(NPs)
be
uniformly
dispersed
MOFs/COFs
synergistic
and/or
tandem
electrocatalysts,
achieve
highly
selective
production
CH4
or
C2H4
CO2RR.A
third
efforts
facilitate
electron-hole
photocatalysis.
Our
focus
regulation
coordination
spheres
fabrication
architecture
heterojunctions,
engineering
films
reduction.Finally,
discuss
several
problems
associated
studies
consider
some
prospects
Angewandte Chemie International Edition,
Journal Year:
2021,
Volume and Issue:
60(47), P. 24849 - 24853
Published: Aug. 26, 2021
Metal-organic
frameworks
(MOFs)
provide
a
platform
to
design
new
heterogeneous
catalysts
for
catalytic
CO2
reduction,
but
selective
formation
of
C2
valuable
liquid
fuel
products
remains
challenge.
Herein,
we
propose
strategy
synthesize
composites
by
integrating
MoS2
nanosheets
into
hierarchically
porous
defective
UiO-66
(d-UiO-66)
form
Mo-O-Zr
bimetallic
sites
on
the
interfaces
between
and
.
The
active
are
favorable
efficient
transfer
photo-generated
charge
carriers
promoting
activity,
whereas,
synergy
components
at
achieves
selectivity
production.
d-UiO-66/MoS2
composite
facilitates
photo-catalytic
conversion
gas
phase
H2
O
CH3
COOH
under
visible
light
irradiation
without
any
other
adducts.
evolution
rate
reached
39.0
μmol
g-1
h-1
94
%,
respectively,
C1
products,
suggesting
approach
highly
photocatalysts
Theoretical
calculations
demonstrate
charge-polarized
Zr-O-Mo
aided
C-C
coupling
process
with
largely
reduced
energy
barrier.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(28)
Published: April 20, 2022
In
natural
photosynthesis,
the
architecture
of
multiproteins
integrates
more
chromophores
than
redox
centers
and
simultaneously
creates
a
well-controlled
environment
around
active
site.
Herein,
we
demonstrate
that
these
features
can
be
emulated
in
prototype
hydrogen-bonded
organic
framework
(HOF)
through
simply
varying
proportion
metalated
porphyrin
structure.
Further
studies
changing
metalloporphyrin
content
not
only
realizes
fine
tuning
photosensitizer/catalyst
ratio,
but
also
alters
microenvironment
surrounding
site
charge
separation
efficiency.
As
result,
obtained
material
achieves
challenging
overall
CO2
reduction
with
high
HCOOH
production
rate
(29.8
μmol
g-1
h-1
,
scavenger
free),
standing
out
from
existing
competitors.
This
work
unveils
degree
metalation
is
vital
to
catalytic
activity
porphryinic
framework,
presenting
as
new
strategy
optimize
performance
heterogeneous
catalysts.
