In
this
study,
Cr-TiO2
nanoparticles
were
synthesized
using
the
sol-gel
method,
with
TiO2
photocatalyst
doped
varying
Cr
concentration.
The
photocatalysts
assessed
for
their
efficacy
in
degrading
Bisphenol-A
under
visible
light.
Optical,
morphological
and
structural
characterization
conducted.
1%
exhibited
a
remarkable
99%
reduction
BPA
degradation
within
4
hours,
compared
to
51.5%
observed
bare
TiO2.
This
enhancement
can
be
attributed
synergistic
effects
arising
from
increased
surface
area,
reduced
particle
size,
semi-spherical,
uniform
morphology
of
nanoparticles.
Photoluminescence
analysis
revealed
that
ion
incorporation
slowed
recombination
processes
between
photogenerated
electron/hole
pairs.
XPS
Eg
data
facilitated
calculation
VB
CB
values,
indicating
predominantly
oxidize
molecule
through
superoxide
([[EQUATION]])
hydroxyl
radicals.
Nanomaterials,
Journal Year:
2025,
Volume and Issue:
15(7), P. 530 - 530
Published: March 31, 2025
The
increasing
presence
of
pharmaceutical
contaminants,
such
as
paracetamol,
in
water
sources
necessitates
the
development
efficient
and
sustainable
treatment
technologies.
This
study
investigates
photocatalytic
degradation
mineralization
paracetamol
under
visible
light
using
nickel-doped
titanium
dioxide
(Ni–TiO2)
catalysts
synthesized
via
sol-gel
method.
were
characterized
through
Raman
spectroscopy,
UV–Vis
diffuse
reflectance
spectroscopy
(UV–Vis
DRS),
surface
area
measurements.
Ni
doping
enhanced
absorption
TiO2,
reducing
its
band
gap
from
3.11
eV
(undoped)
to
2.49
at
0.20
wt.%
loading,
while
analysis
confirmed
incorporation
with
anatase
predominant
phase.
Ni(0.1%)-TiO2
catalyst
exhibited
highest
activity,
achieving
88%
total
organic
carbon
(TOC)
removal
(5
ppm)
after
180
min
optimal
conditions
(catalyst
dosage,
3
g
L−1).
Stability
tests
demonstrated
84%
retained
efficiency
over
five
cycles,
a
kinetic
rate
constant
0.010
min−1.
Hydroxyl
radicals
identified
main
reactive
species.
maintained
high
performance
tap
water,
78.8%
TOC
removal.
These
findings
highlight
potential
cost-effective,
light-active
photocatalyst
for
pollutants,
promising
scalability
industrial
applications.
Inorganics,
Journal Year:
2025,
Volume and Issue:
13(4), P. 121 - 121
Published: April 11, 2025
Photocatalytic
H2
production
is
one
of
the
most
promising
approaches
for
sustainable
energy.
The
literature
presents
a
plethora
carefully
designed
systems
aimed
at
harnessing
solar
energy
and
converting
it
into
chemical
However,
main
drawback
reported
photocatalysts
their
stability.
Thus,
development
cost-effective
stable
photocatalyst,
suitable
real-world
applications
remains
challenge.
An
ideal
photocatalyst
must
possess
appropriate
band-edge
positions,
an
effective
sacrificial
agent,
cocatalyst.
Among
various
studied,
TiO2
stands
out
due
to
its
stability,
abundance,
non-toxicity.
efficiency
in
visible
spectrum
limited
by
wide
bandgap.
Metal
doping
strategy
enhance
electron–hole
separation
improve
light
absorption
efficiency,
thereby
boosting
synthesis.
Common
metal
cocatalysts
used
as
dopants
include
platinum
(Pt),
gold
(Au),
copper
(Cu),
nickel
(Ni),
cobalt
(Co),
ruthenium
(Ru),
iron
(Fe),
silver
(Ag),
well
bimetallic
combinations
such
Ni-Fe,
Ni-Cu,
Nb-Ta,
Ni-Pt.
In
all
cases,
doped
exhibits
higher
performance
compared
undoped
TiO2,
metals
provide
additional
reaction
sites
charge
separation.
use
further
optimizes
hydrogen
evolution
reaction.
Additionally,
porphyrins,
with
strong
efficient
electron
transfer
properties,
have
demonstrated
potential
photocatalysis.
Their
incorporation
expands
photocatalyst’s
range
spectrum,
enhancing
efficiency.
This
review
paper
explores
principles
advancements
metal-
porphyrin-doped
photocatalysts,
highlighting
production.
Journal of Applied Physics,
Journal Year:
2025,
Volume and Issue:
137(12)
Published: March 24, 2025
This
study
investigates
the
influence
of
atomic
radii
copper,
cobalt,
and
cadmium
on
photocatalytic
activity
anatase
TiO2
xerogels
synthesized
via
solgel
method.
All
samples
were
annealed
at
550
°C
for
20
min
crystallized
into
pure
phase,
as
confirmed
by
XRD
Raman
spectroscopy.
Dopant
incorporation
matrix
reduced
grain
size
(from
24.01
to
9.78
nm)
decreased
bandgap
energy
3.44
3.19
eV).
Photocatalytic
degradation
methylene
blue
(MB)
revealed
enhanced
doped
samples,
with
rates
increasing
from
71.65%
undoped
TiO
79.29%,
86.54%,
94.13%
2
at.
%
Cu-TiO2,
Co-TiO2,
Cd-doped
TiO2,
respectively.
Among
dopants,
Cd-TiO2
exhibited
highest
efficiency
fastest
rate.
Furthermore,
sample
demonstrated
excellent
stability,
retaining
more
than
90%
its
over
six
cycles
only
a
4%
loss
in
capacity.
