International Journal of Environmental & Analytical Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 25
Published: Dec. 22, 2024
Dye,
a
major
global
pollutant
causing
environmental
and
health
issues,
can
be
effectively
degraded
through
photocatalysis.
This
study
synthesised
bismuth
oxychloride
(BiOCl)
nano-photocatalyst
via
hydrolysis
characterized
it
using
various
analytical
instruments.
The
UV-Vis
absorbance
of
the
displayed
peaks
at
211
nm,
361
688
with
band
gap
3.0
eV,
conduction
minimum
1.97
valence
maximum
4.97
eV.
dynamic
light
scattering
showed
3349
nm
660
while
BiOCl
had
zeta
potential
-17.3
mV
conductivity
0.245
mS/cm.
X-ray
diffraction
exhibited
four
sharp
intensity
11.95º,
25.81º,
32.50º,
33.40º,
average
crystallite
size
was
43.39
scanning
electron
microscope
plate-like
morphology.
achieved
88.21%
degradation
methyl
green
within
60
minutes
under
LED
irradiation
pH
7.5
dye
concentration
6×10−6
mol/L.
photocatalytic
performance,
driven
by
hydroxyl
(•OH)
superoxide
(O2•−)
radicals,
96.55%
mineralization
as
confirmed
COD
analysis.
These
findings
emphasize
for
effective
sustainable
wastewater
remediation
visible
conditions.
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 5, 2025
The
solar-driven
photocatalytic
reduction
of
CO2
into
fuels
using
a
C3N4-based
photocatalyst
has
shown
great
application
potential
in
addressing
challenges
related
to
energy
and
emission.
However,
this
process
suffers
from
severe
charge
recombination
sluggish
H2O
oxidation
kinetics,
resulting
low
efficiency.
In
study,
2D/2D
S-scheme
heterojunction
by
combining
oxygen
vacancy-rich
BiVO4
nanoflakes
with
C3N4
nanosheets
(denoted
as
Ov-BVO/CN)
was
fabricated
mitigate
the
aforementioned
issues,
where
serves
water
booster
center.
By
leveraging
synergistic
effects
lamellar
morphology
an
charge-transfer
pathway,
Ov-BVO/CN
achieves
efficient
separation
while
maintaining
maximized
redox
capabilities.
Moreover,
theoretical
calculations
demonstrated
that
Ov
on
surface
reverses
rate-limiting
step
reducing
its
barrier,
thereby
accelerating
reaction
kinetics.
optimized
demonstrates
remarkably
improved
evolution
rates
for
CO
(13.8
μmol
g–1
h–1)
CH4
(5.9
h–1),
which
are
approximately
3.8
3.5
times
higher
than
those
CN
under
visible-light
irradiation,
respectively.
This
work
highlights
design
fabrication
highly
heterostructure
photocatalysts
photoreduction.
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
64(5), P. 2443 - 2457
Published: Jan. 31, 2025
The
n-type
and
p-type
conductivity
mechanisms
from
intrinsic
defects
Group
IIA
VIB
element
doping
in
the
photocatalyst
BiTaO4
are
systematically
investigated
by
employing
hybrid
density
functional
calculations.
results
reveal
that
vacancies
VBi,
VTa,
VO,
antisite
TaBi
predominant
defects,
depending
on
growth
conditions.
Bi-rich,
appropriate
Ta-rich,
O-poor
conditions
can
promote
to
form
due
presence
of
donor
defect
its
easier
ionization.
This
explains
experimental
character
well.
Meanwhile,
under
O-rich,
Bi-poor,
Ta-poor
conditions,
exhibits
superior
forming
excellent
acceptor
VBi
VTa.
Moreover,
be
further
strengthened
via
introductions
substitutional
MBi
(M
=
Mg,
Ca,
Sr,
Ba)
Ta-poor,
O-rich
where
O
should
induced
Sr
is
best
candidate.
On
other
hand,
(Cr,
Mo,
W)
improve
W
These
findings
provide
a
comprehensive
understanding
physics
offer
insights
into
optimizing
photocatalytic
performance
through
targeted
engineering
impurity
doping.
