We
prepared
fragments
of
polymeric
g-C3N4
sheets
functionalized
with
cyamelurate-like
functional
groups,
evaluated
their
Fenton-like
catalytic
properties
and
proposed
a
reaction
mechanism
for
the
formation
hydroxyl
radicals
on
surface
materials
in
presence
H2O2.
The
controlled
fragmentation/functionalization
was
characterized
by
variety
techniques
including
SEM,
TEM,
FTIR
potentiometric
titration.
performance
catalysts
proved
to
be
dependent
both
groups
conjugated
structure
sheets,
kinetics
catalyzed
being
faster
at
higher
pH.
In
addition,
absence
contaminant,
no
significant
consumption
hydrogen
peroxide
observed.
oxidizing
elucidated
using
cyclic
voltammetry
EPR
spectroscopy
parallel
theoretical
calculations
based
estimate
Gibbs
free
energy
HO•
HOO•
formation,
generated
through
peroxide.
broader
context,
results
shown
here
may
contribute
development
strategies
studying
elucidating
mechanisms
involving
metal-free
catalysts,
one
main
challenges
area
and,
enabling
designing
different
oxidation
reactions.
Applied Sciences,
Год журнала:
2024,
Номер
14(5), С. 1715 - 1715
Опубликована: Фев. 20, 2024
The
study
assessed
the
influence
of
pyrolysis
temperature
on
properties
hickory
sawdust
and
peanut
shells
based
biochar,
particularly
its
pore
structure,
surface
functional
groups,
adsorption
capacity.
Results
from
SEM
analysis
demonstrated
that
higher
temperatures
led
to
an
enhanced
structure
roughness
in
biochars,
providing
increased
Raman
spectrum
revealed
levels
disorder
graphitization
biochars
pyrolyzed
at
elevated
temperatures.
Quantification
groups
using
Boehm
method
indicated
a
shift
abundance
basic
acidic
under
high
conditions.
Employing
FHH
model,
fractal
characteristics
were
observed
different
with
high-temperature
displaying
disorder.
also
explored
mechanism
SMX
onto
revealing
capacity
for
richer
structures
rougher
surfaces.
Elovich
model
proved
be
best
fit
describing
chemisorption
process
biochars.
Moreover,
impact
urine
ions
These
findings
provide
valuable
insights
into
potential
applications
environmental
remediation.
Molecules,
Год журнала:
2023,
Номер
28(19), С. 6786 - 6786
Опубликована: Сен. 24, 2023
Z-scheme
Bi2MoO6/Bi5O7I
heterojunction
was
constructed
by
an
in
situ
solvothermal
method,
which
composed
of
Bi2MoO6
nanosheets
growing
on
the
surface
Bi5O7I
microrods.
The
antibacterial
activities
under
illumination
towards
Escherichia
coli
(E.
coli)
were
investigated.
composites
exhibited
more
outstanding
performance
than
pure
and
Bi5O7I,
E.
(108
cfu/mL)
completely
inactivated
BM/BI-3
90
min
irradiation.
Additionally,
experiment
adding
scavengers
revealed
that
h+,
•O2-
•OH
played
important
role
inactivation
process.
cell
membrane
damaged
oxidation
•OH,
intracellular
components
(K+,
DNA)
subsequently
released,
ultimately
triggered
apoptosis
cell.
enhanced
is
due
to
formation
with
effective
charge
transfer
via
well-contacted
interface
Bi5O7I.
This
study
provides
useful
guidance
how
construct
Bi5O7I-based
for
water
disinfection
abundant
solar
energy.
