Case Studies in Chemical and Environmental Engineering,
Год журнала:
2024,
Номер
9, С. 100673 - 100673
Опубликована: Фев. 23, 2024
It
is
difficult
to
reuse
wastes
from
polymers
due
the
mismatch
between
amount
of
contaminants
and
secondary
quality
feed.
This
type
operation
much
more
expensive
cost-effective
than
production
polymer
raw
materials
latest
materials.
However,
recyclable
beneficial
if
used
extensively
in
various
concrete
products
wood-polymer
boards.
done
only
cleaning
sorting
are
not
particularly
important
for
products.
Polyethylene
terephthalate
(PET)
a
widely
industries
its
excellent
physical
chemical
properties.
Besides,
increasing
use
PET
has
led
global
crisis
waste
management,
as
improper
disposal
caused
significant
environmental
damage.
major
source
accumulated
landfills,
address
this
issue,
recycling
methods
have
evolved.
In
regard,
present
review
examines
techniques
involved
PET.
Conventional
influence
diverse
depolymerization
reaction
variables
were
discussed,
upsides
downsides
each
technique
considered.
The
summarizes
advances
technologies
plastic
waste,
focusing
on
bio-recycling
PET,
aiming
sustainable,
economical
solutions
circular
economy.
Case Studies in Chemical and Environmental Engineering,
Год журнала:
2024,
Номер
9, С. 100626 - 100626
Опубликована: Янв. 24, 2024
Nanoparticles
have
revolutioned
materials
secience
and
manufacturing
industry
thanks
to
their
ultrafine
scale.
Nano-scale
titanium
oxide
(nano-TiO2)
are
key
elements
of
a
wide
variety
sectors
advanced
materials,
devices,
systems
in
view
versatility
extraordinary
characetristics,
mainly
optical,
electrical
catalytic
properties.
Thnaks
aforementioned
features,
they
found
position
different
industries
such
as
colors
pigments,
photocatalysts,
photovoltaic
solar
cells,
adsorbents,
cosmetics,
electric
electronic
devices.
Nano-SiO2
application
gives
rise
range
properties
performance,
which
severely
depends
on
particle
size,
size
distribution,
agglomeration
the
bulk
host
or
systems.
When
used
surface
coating
additive
even
functionalized,
nano-
TiO2
takes
more
roles,
state-of-the-art
depending
synthesis
method.
Therefore,
review
synthesis,
properties,
surface-
bulk-functionalization/modification
(respectively
with
function
groups
doping)
methods
achieving
high-performance
seems
essential.
In
this
review,
background
information
developments
from
pure
Titanium
Oxide
chemically
modified
-based
photocatalysts
were
discussed
detail,
Photocatalytic
activity
oxide-based
nitrogen
group
pollutant
decomposition.
It
also
Vehicle
for
Chemotherapeutics
Other
Applications
Medicine
an
overview
factors
affecting
been
reviewed.
Results in Chemistry,
Год журнала:
2024,
Номер
7, С. 101332 - 101332
Опубликована: Янв. 1, 2024
The
emission
of
heavy
metals
in
the
environment
has
caused
many
problems
world
due
to
industrialization
society
and
expansion
urbanization.
Environmental
pollution,
including
greenhouse
gases
water-soluble
toxic
pollutants,
is
a
major
concern
around
world.
One
most
important
issues
protecting
health
humans,
animals
plants
cleanliness
water.
Water
substance
vital
for
all
living
things
on
planet.
can
be
treated
several
ways,
such
as
desalination,
purification,
osmosis,
disinfection,
deposition
contaminants.
Among
these
methods,
adsorption
method
advantages
over
other
methods.
surface
phenomenon
during
which
contaminants
are
adsorbed
adsorbent
with
physical
forces
depends
factors
temperature,
pH,
concentration
contaminants,
time
phase
contact
particle
size
temperature
nature
pollutants
adsorption.
Chitosan
received
widespread
attention
an
because
its
low
cost
great
potentials.
abundant
hydroxyl
amino
groups
that
bind
metal
ions.
However,
it
defects
sensitivity
thermal
stability,
mechanical
strength,
limit
application
chitosan
wastewater
treatment.
functional
modified
improve
performance
via
crosslinking
graft
modification.
porosity
specific
area
powder
form
not
ideal,
therefore,
modification
been
attempted
generate
nanoparticles
hydrogel.
also
integrated
materials
(e.g.
graphene,
zeolite)
resulting
composite
improved
performance.
This
review
mainly
focuses
reports
about
derivatives
remove
different
metals.
preparation
strategy,
mechanism,
affecting
adsorbents
each
type
discussed
detail.
Recent
organic
(dyes
phenol)
removal
by
briefly
discussed.
Results in Chemistry,
Год журнала:
2024,
Номер
7, С. 101549 - 101549
Опубликована: Янв. 1, 2024
Biogas
is
obtained
from
the
breakdown
of
biomass
by
microorganisms
and
bacteria
in
absence
oxygen.
considered
a
renewable
source
energy,
similar
to
solar
energy
wind
energy.
can
be
produced
or
bio-waste;
thus,
it
environmentally
friendly.
suspended
monoxide
decomposition
process
anaerobic
fermentation
decomposable
materials
such
as
agricultural
manure,
sewage,
municipal
waste,
green
waste
(gardens
parks),
plant
material
products.
natural
that
leaves
effective
effects
on
nature
industries.
This
gas
organic
materials,
including
animal
food
sewage.
Fertilizers
produce
biogas
through
digestion
(ie
without
presence
oxygen).
mixture
gases
generated
decaying
biodegradable
Its
main
contents
are
50–70
%
methane
(CH4)
volume,
30–50
carbon
dioxide
(CO2),
traces
other
gases,
like
hydrogen
sulfide
(H2S)
water
vapor
(H2O).
CO2,
H2S,
content
may
affect
performance
life
conversion
devices;
consequently,
their
removal
before
end-use
essential
for
improving
quality
biogas.
combination
an
ideal
option
making
The
most
important
advantages
(production
reduction
amount
discarded
pathogens,
containing
matter
into
high
fertilizer,
protection
vegetation,
soil,
water,
increasing
productivity
field
livestock
agriculture)
It
also
one
disadvantages
(incomplete
small
technologies,
impurities,
effect
temperature
production,
unsuitable
urban
dense
areas,
not
affordable).
For
economical
use
biogas,
carried
out
under
controlled
conditions
relatively
simple
device
called
reservoir.
review
summarizes
current
state-of-the-art
presents
future
perspectives
related
production.
Moreover,
historical
retrospective
sector
early
years
its
development
till
recent
advancements
give
outlook
opportunities
opening
up
optimization.
Case Studies in Chemical and Environmental Engineering,
Год журнала:
2024,
Номер
9, С. 100612 - 100612
Опубликована: Янв. 11, 2024
Polylactic
acid
(PLA)
is
a
linear
aliphatic
polyester
thermoplastic
made
from
renewable
sources
such
as
sugar
beet
and
cornstarch.
Methods
of
preparation
polylactic
are
biological
chemical.
The
advantages
biocompatibility,
easily
processing,
low
energy
loss,
transparency,
high
strength,
resistance
to
water
fat
penetration
consumption
carbon
dioxide
during
production.
However,
has
disadvantages
hydrophobicity,
fragility
at
room
temperature,
thermal
resistance,
slow
degradation
rate,
permeability
gases,
lack
active
groups
chemical
neutrality.
To
overcome
the
limitations
acid,
stability
inability
absorb
nanoparticles
graphene
added
improve
its
properties.
Samples
were
prepared
by
solution
casting
method
using
chloroform
solvent
in
thin
films.
mechanical,
thermal,
structural
properties
pure
acid/graphene
nanocomposites
studied
tensile
Test
X-ray
diffraction
(XRD),
Root
mean
square
(RMS)
Differential
Scanning
Calorimetry
(DSC).
Also,
exposing
samples
Ultraviolet
(UV)
rays
then
performing
test,
produced
against
was
investigated.
With
above
tests,
it
found
that
adding
crystallinity
decreases
strength
elongation
particles
(0.4%
graphene)
increase
certain
extent
decrease.
loss
modulus
storage
also
increased
addition
nanoparticles.
By
comparing
exposed
with
other
samples,
significant
decrease
elasticity
observed.
In
words,
make
brittle.
Results in Chemistry,
Год журнала:
2024,
Номер
7, С. 101422 - 101422
Опубликована: Янв. 1, 2024
Development
of
lithium-ion
batteries
(Li-ion
batteries)
with
high
safety
and
solidity
features
has
become
a
main
challenge
researchers
when
practical
implementations
for
large-scale
energy
storage
systems
are
prioritized.
In
this
work,
we
introduce
useful
efficient
strategy
to
manufacture
long-standing
high-rate
carbon-doped
TiO2
(C-TiO2)
as
an
anode
material.
Titanium
(TiO2)
C-TiO2
were
successfully
prepared
through
hydrothermal
method
in
order
improve
the
electrical
performance
Li-battery.
The
structure
thermal
properties
investigated
by
XRD,
Raman
TGA;
whereas
evaluated
Glvanostatic
discharge–charge
measurements.
density
function
theory
(DFT)
results
revealed
that
doped
carbon
atoms
causes
considerable
stress
inside
crystal
lattice
TiO2,
avoid
or
minimize
underwent
relaxation
then
optimized.
electrodes
Li-battery
was
analyzed
100
cycles
at
different
calcination
temperatures
400
450
°C.
also
showed
charge
capacities
500
mAhg−1
mAg−1.
RSC Advances,
Год журнала:
2023,
Номер
13(51), С. 36280 - 36292
Опубликована: Янв. 1, 2023
The
level
of
free
bilirubin
is
a
considerable
index
for
the
characterization
jaundice-related
diseases.
Herein,
biosensor
was
fabricated
via
immobilization
oxidase
(BOx)
on
graphene
oxide
(GO)
and
polyaniline
(PANI)
that
were
electrochemically
co-precipitated
indium
tin
(ITO)
conductive
glass.
structural
enzyme
electrode
characterized
by
FTIR,
XRD,
Raman
spectroscopy,
while
spectral
thermal
properties
investigated
UV-vis
thermogravimetric
analysis
(TGA).
Owing
to
activity
BOx/GO@PANI/ITO
biosensor,
it
could
detect
with
good
selectivity
sensitivity
in
low
response
time.
electrochemical
studied
using
impedance
spectroscopy
(EIS)
cyclic
voltammetry
(CV).
At
polarization
potential
0.2
V
vs.
Ag/AgCl,
sensor
illustrated
only
2
s
at
30
°C
pH
7.5.
LOD
LOQ
calculated
found
be
0.15
nM
2.8
nM,
respectively.
signal
showed
linear
concentration
range
0.01-250
μM.
5
°C,
demonstrated
half-time
120
days,
through
which
utilized
100
times
this
temperature
conditions.
By
common
colorimetric
method,
data
levels
serum
determination
coefficient
(R2)
0.97.
Heliyon,
Год журнала:
2023,
Номер
9(12), С. e22559 - e22559
Опубликована: Ноя. 23, 2023
Significant
deformation
of
the
metal
structure
can
be
achieved
without
breaking
or
cracking
metal.
There
are
several
methods
for
plastics.
The
most
important
these
angular
channel
pressing
process,
high-pressure
torsion,
multidirectional
forging
extrusion-cyclic
compression
cumulative
climbing
connection
consecutive
concreting
and
smoothing
method,
pipe
torsion.
nanocomposite
is
a
multiphase
material
which
size
one
its
phases
less
than
100
nm
in
at
least
dimension.
Due
to
some
unique
properties,
metal-based
nanocomposites
widely
used
engineering
applications
such
as
automotive
aerospace
industries.
Polymer-based
two-phase
systems
with
polymer-based
reinforcing
(usually
ceramic).
These
materials
have
simpler
synthesis
process
variety
industry,
gas
pipelines,
sensors.
Severe
plastic
(SPD)
known
best
method
producing
bulk
ultrafine
grained
nanostructured
excellent
properties.
Different
were
developed
that
suitable
sheet
solid
materials.
During
past
decade,
efforts
been
made
create
effective
processes
cylindrical
tubes.
In
this
paper,
we
review
intended
tubes,
their
effects
on
properties
severe
briefly
introduced
common
materials,
sheets,
pipes,
well
background
nanocomposites,
concisely
microstructural
mechanical
discussed.
paper
will
focus
introduction
tube
processes,
then
comparison
them
based
advantages
disadvantages
from
viewpoints
processing
Case Studies in Chemical and Environmental Engineering,
Год журнала:
2023,
Номер
8, С. 100535 - 100535
Опубликована: Окт. 27, 2023
Phenolic
resins
have
excellent
dimensional,
thermal,
chemical
and
corrosion
resistance.
Also,
the
volatile
substances
produced
during
thermal
degradation
of
this
resin
low
toxicity
and,
in
addition,
they
high
charring.
been
applied
many
areas
such
as
internal
parts
war
planes,
structures
used
marine
platforms,
flame
retardant
plastics
carbon/carbon
composites
due
to
having
mentioned
favorable
properties.
In
article,
phenolic
samples
Resole
reinforced
with
carbon
fibers
graphene
nanoparticles
were
prepared.
last
decade,
development
new
polymer
nanocomposites
has
grown
significantly.
contrast
conventional
common
composites,
a
feature
which
filler
that
size
less
than
100
nm
at
least
one
dimension
is
used.
One
advantages
it
gives
several
properties
primary
polymer,
despite
fact
creates
limitations
its
processability
other
reinforcements.
The
key
these
features
design
behavior
nanocomposites,
includes
nanoparticle
interface
between
matrix.
Nowadays,
engineering
applications,
necessary
combine
materials,
not
possible
use
type
material
satisfies
all
desired
For
example,
aerospace
industry,
there
need
for
materials
strength,
lightness,
wear
resistance
good
ultraviolet
light
do
lose
their
strength
temperatures.
Since
difficult
find
above
properties,
better
look
method
solution
composite
materials.
