Catalysts,
Journal Year:
2023,
Volume and Issue:
13(2), P. 380 - 380
Published: Feb. 9, 2023
It
is
well-documented
that
large-scale
pollution
generated
by
human
activity
has
a
dramatic
impact
on
ecosystems.
In
this
context,
removing
harmful
chemicals
via
photocatalysis
tremendous
potential
as
depollution
method,
utilizing
freely
available
solar
light
and
catalytic
materials
with
low
or
negligible
ecotoxicity.
The
main
drawbacks,
which
aren’t
often
addressed
in
the
literature,
are
formation
of
intermediate
products,
reaction
rates,
limited
catalyst
stability,
difficult
recovery.
most
cases,
published
works
assess
efficiency
tested
photocatalysts
from
pollutant
degradation
studies,
whereas
identifying
quantifying
by-products
not
conducted.
This
review
summarizes
recent
advances
reported
for
photocatalytic
removal
some
organic
(e.g.,
alcohols,
carboxylic
acids,
volatile
compounds,
phenol)
inorganic
NO3−)
contaminants.
various
UV-
visible-light
active
pathways
were
explained,
emphasizing
factors
contributing
to
their
mineralization.
mechanisms,
identification
quantification
intermediates,
implication
reactive
species
(ROS)
discussed
analyzed
each
category
model
target
pollutant.
Additionally,
actual
challenges
future
approaches
improve
environmental
remediation
presented.
ACS Applied Materials & Interfaces,
Journal Year:
2017,
Volume and Issue:
9(30), P. 25377 - 25386
Published: July 11, 2017
A
novel
CdS/ZnO
heterojunction
constructed
of
zero-dimensional
(0D)
CdS
quantum
dots
(QDs)
and
two-dimensional
(2D)
ZnO
nanosheets
(NSs)
was
rationally
designed
for
the
first
time.
The
2D
NSs
were
assembled
into
microflowers
(MFs)
via
an
ultrasonic-assisted
hydrothermal
procedure
(100
°C,
12
h)
in
presence
a
NaOH
solution
(0.06
M),
QDs
deposited
on
both
sides
every
NS
situ
by
using
successive
ionic-layer
absorption
reaction
method.
It
found
that
ultrasonic
treatment
played
important
role
generation
NSs,
while
responsible
to
assembly
flower-like
structure.
obtained
0D/2D
heterostructures
exhibited
remarkably
enhanced
photocatalytic
activity
hydrogen
evolution
from
water
splitting
comparison
with
other
different
dimensional
combinations
such
as
2D/2D,
0D/three-dimensional
(3D),
3D/0D.
Among
them,
CdS/ZnO-12
(12
deposition
cycles
QDs)
highest
rate
22.12
mmol/g/h,
which
13
138
times
higher
than
those
single
(1.68
mmol/g/h)
(0.16
mmol/g/h),
respectively.
can
be
attributed
several
positive
factors,
formation
Z-scheme
system,
tiny
size
effect
0D
intimate
contact
between
NSs.
system
promoted
separation
migration
photogenerated
electron–hole
pairs.
effectively
decreased
recombination
probability
electrons
holes.
two
semiconductors
efficiently
reduced
resistance
carriers.
Furthermore,
also
presented
excellent
stability
without
any
decay
within
five
25
h.
ACS Applied Materials & Interfaces,
Journal Year:
2018,
Volume and Issue:
11(6), P. 5581 - 5589
Published: May 2, 2018
Photocatalytic
CO2
conversion
into
solar
fuels
has
an
alluring
prospect.
However,
the
rapid
recombination
of
photogenerated
electron-hole
pairs
for
TiO2-based
photocatalyst
hinders
its
wide
application.
To
alleviate
this
bottleneck,
a
ternary
hybrid
TiO2-MnO
x-Pt
composite
is
excogitated.
Taking
advantage
surface
junction
between
{001}
and
{101}
facets,
MnO
x
nanosheets
Pt
nanoparticles
are
selectively
deposited
on
each
facet
by
facile
photodeposition
method.
This
design
accomplishes
formation
two
heterojunctions:
p-n
TiO2
metal-semiconductor
facet.
Both
them,
together
with
heterojunction
contributive
to
spatial
separation
pairs.
Thanks
their
cooperative
synergistic
effect,
as-prepared
exhibits
promoted
yield
CH4
CH3OH,
which
over
threefold
pristine
films.
The
conjecture
mechanism
that
selective
multijunction
structure
maximizes
transfer
efficiency
charge
carriers
proved
photoelectrochemical
analysis.
work
not
only
successfully
achieves
efficient
ingenious
but
also
provides
insight
performance
enhancement.
Chemical Engineering Journal Advances,
Journal Year:
2022,
Volume and Issue:
10, P. 100262 - 100262
Published: Feb. 8, 2022
Titanium
dioxide
(TiO2)
as
a
photocatalyst
has
been
ubiquitously
studied
for
environmental
applications.
Though,
readily
available,
nontoxic,
and
environmentally
friendly;
lower
efficiency,
less
energy
harvesting
within
the
UV–Vis
range
with
ease
of
photogenerated
charge
recombination
is
still
concern
its
full-scale
deployment
remediation
In
light
this,
this
mini
review
considers
heteroatom
doping,
dye/metal
sensitization,
metal
oxide/
semiconductor
coupling,
heterojunction
constructions,
surface
morphology
regulation
well
carbonaceous
other
nanomaterial
hybrids
improvement
TiO₂
photocatalytic
activity
performance
efficiency
in
removal
contaminants
emerging
(CECs)
from
aqueous
systems.
APL Materials,
Journal Year:
2020,
Volume and Issue:
8(3)
Published: March 1, 2020
In
this
research
update,
we
discuss
the
visible-light
photocatalysis.
Due
to
potential
of
utilizing
freely
available
solar
energy
for
environmental
remediation
and
fuel
generation,
topic
has
been
increasing
interest.
Huge
amount
work
done
in
developing
a
large
variety
photocatalyst
materials,
advances
have
made
understanding
process.
Nevertheless,
substantial
challenges
remain.
Some
those
could
possibly
be
solved
by
better
but
many
cases,
biggest
problem
is
whether
photocatalysis
scaled
up
an
industrial
process
that
would
cost-competitive
existing
technologies.
Here,
different
types
photocatalysts
their
applications
outline
various
need
addressed
development
practically
relevant
materials
systems.
Catalysis Reviews,
Journal Year:
2019,
Volume and Issue:
62(1), P. 1 - 65
Published: May 7, 2019
Pesticides
and
organic
waste
constitute
a
group
of
environmental
pollutants
that
are
widely
distributed
in
our
environment
due
to
various
human
activities.
Adsorptive
removal
photocatalytic
degradation
these
from
water
have
emerged
as
energy
cost-effective
technologies.
However,
advanced
oxidation
technologies
gaining
attention
an
effective
method
for
wastewater
treatment
capable
degrading
diverse
spectrum
contaminants.
Photocatalysis
is
promising
technology
alleviate
pollution
problems.
Titanium
dioxide
(TiO2)
the
most
popular
photocatalyst
its
low
cost,
nontoxicity,
high
oxidizing
abilities,
easy
immobilization
on
surfaces.
The
current
review
aims
highlight
recent
advancements
pesticides
major
using
TiO2-based
photocatalysts.
Indeed,
methods,
which
employed
potent
catalysts,
showed
exhibited
successful
under
conditions.
We
believe
this
topic
research
extremely
vital
will
continue
grow
years,
reaching
ultimate
desirable
results
find
more
applications
different
fields
study.
