Physical Chemistry Chemical Physics,
Journal Year:
2023,
Volume and Issue:
25(22), P. 15219 - 15236
Published: Jan. 1, 2023
Herein,
a
novel
type-II
BiVO4/BiOI
(BVOI)
heterojunction
electrode
material
was
successfully
fabricated
by
using
facile
two-step
electrodeposition
approach.
The
experimental
results
revealed
that
BiOI
nanosheets
were
deposited
onto
the
surface
of
BiVO4
particles
successfully,
with
special
morphology
providing
more
active
sites,
which
beneficial
to
improvement
PEC
performance.
According
electrochemical
performance
tests,
it
could
be
observed
construction
effectively
promoted
separation
photoinduced
electron-hole
pairs
and
increased
transfer
rate
charges.
Under
visible-light
irradiation,
BVOI-300
photoanode
possessed
highest
β-naphthol
degradation
at
pH
=
7,
approximately
reached
82%,
whose
corresponding
kinetic
constant
1.4
1.5
times
higher
than
those
pure
BiOI.
After
five
cycles,
still
remained
64.61%.
band
structure
BVOI
deduced,
mechanism
investigated
through
radical
trapping
quenching
experiments
ESR
test,
indicated
˙OH,
h+
˙O2-
radicals
crucial
species
in
process.
For
working
electrode,
TOC
content
coal
gasification
wastewater
(CGW)
decreased
from
94.44
54.4
mg
L-1,
removal
42.4%.
GC-MS
used
identify
organic
components
wastewater,
expected
provide
reference
for
remedying
actual
containing
refractory
pollutants
offer
new
development
direction
treatment
chemical
wastewater.
