Hydrogen,
Journal Year:
2024,
Volume and Issue:
5(4), P. 940 - 957
Published: Dec. 4, 2024
Enhanced
photo-induced
electron
utilization
leads
to
efficient
photocatalytic
hydrogen
production.
The
inefficient
separation
of
electron–hole
pairs
has
hindered
this
process.
This
study
introduces
a
synergistic
approach
using
defect-rich
SnS2
and
Ti3C2
MXene
as
cocatalysts
in
two-step
hydrothermal
process
address
challenge.
By
integrating
these
materials
with
TiO2
nanosheets,
we
create
novel
composite,
SnS2/Ti3C2/TiO2
(STT),
that
significantly
boosts
evolution.
provides
abundant
active
sites
for
generation,
while
facilitates
charge
separation.
combination
carrier
diffusion
enhances
chromophore
absorption,
thereby
increasing
the
overall
hydrogen-production
rate,
achieving
several
grams
per
hour
gram
double
molybdenum
vacancies.
Characterization
techniques
confirm
phase
composition
composite
(STT).
Compared
pristine
other
composites,
STT
optimized
150
°C
treatment,
shows
H2-production
rate
nearly
192
times
higher
than
pure
6
composites.
presence
vacancies
further
its
specific
activity
evolution
by
suppressing
recombination
providing
additional
sites.
Moreover,
act
dual
cocatalysts,
improving
electronic
conductivity
electron-transfer
efficiency.
Our
findings
demonstrate
potential
combining
develop
highly
sustainable
photocatalysts
been
situ
grown
on
conductive
MXene,
SnS2,
rich
vacancies,
is
uniformly
distributed
TiO2/Ti3C2
through
method.
Applied Water Science,
Journal Year:
2025,
Volume and Issue:
15(2)
Published: Jan. 9, 2025
Abstract
In
this
research,
the
impact
of
integrating
solar
still
with
thermal
energy
storage
material
and
flat
plate
collector
(FPSC)
on
freshwater
productivity
was
experimentally
investigated.
The
experiments
were
conducted
three
types
similar-sized
stills
under
climate
conditions
Saudi
Arabia.
first
type
a
conventional
(CSS),
without
any
modifications.
second
modified
(MSS-1),
CSS
integrated
natural
stones
in
basin.
third
(MSS-2),
both
FPSC.
Three
same
quantity
selected
individually
tested
MSS-1
MSS-2
simultaneously
(each
stone
one
day).
corresponding
experimental
results
showed
11–32%
increase
daily
yield,
compared
to
CSS,
indicating
minimal
effect
utilization
productivity.
155–183%
significant
basin
water
heating
total
dissolved
solids
(TDS)
level
measured
at
112
ppm,
which
complies
permissible
limits
for
drinking
quality
standards.
economic
analysis
revealed
that
cost
produce
liter
is
0.028,
0.022,
0.027
$
from
MSS-1,
MSS-2,
respectively.
Additionally,
benefit–cost
ratio
(BCR)
demonstrated
feasibility
constructed
still,
BCR
value
2.1.
Processes,
Journal Year:
2023,
Volume and Issue:
11(12), P. 3337 - 3337
Published: Nov. 30, 2023
Solar
distillation
emerges
as
a
viable
remedy
for
addressing
water
scarcity
in
both
remote
and
urban
locales.
However,
its
operational
efficiency
remains
limiting
factor.
Consequently,
this
study
undertakes
comprehensive
approach
by
introducing
design
modifications
to
enhance
distiller’s
overall
productivity.
The
pivotal
adjustment
involves
configuring
the
distiller
into
three-tiered
structure,
thus
designating
it
multi-stage
solar
still
(MSSS).
Notably,
stills
are
crafted
entirely
from
glass
optimize
consistent
tracking,
eschewing
conventional
sun-tracking
rotation
mechanism.
Furthermore,
three-stage
undergoes
refinement
through
incorporation
of
thermo-storing
material
(PCM)
comprising
paraffin
infused
with
graphene
nanocomposites
at
base
(SS).
Subsequent
these
enhancements,
evaluation
encompassing
exergy,
economic
viability,
environmental
impact,
thermal
considerations
is
conducted
(CSS)
MSSS.
outcomes
elucidate
that
upper
stage
MSSS
outperforms
counterparts,
producing
superior
results.
Comparative
analysis
indicates
remarkable
160%
enhancement
productivity
over
CSS.
Cumulative
productivities
CSS
PCM
recorded
2840
7980
mL/m2
during
daytime,
reflecting
an
improvement
181%.
energy
metrics
reveal
values
31%,
49.8%,
53%
CSS,
MSSS,
PCM,
respectively.
Moreover,
demonstrates
exergy
5.8%.
implications
quantified
12
tons
CO2
emissions
per
year
PCM.
Finally,
cost
illustrate
reduction
freshwater
(0.10
$/L)
(0.13
$/L),
compared
SS
(0.24
$/L).
Processes,
Journal Year:
2025,
Volume and Issue:
13(1), P. 169 - 169
Published: Jan. 9, 2025
Biological
foaming
is
a
major
problem
in
activated
sludge
(AS)
wastewater
treatment
systems.
In
this
study,
four
plants
(WWTPs)
(a
total
of
six
AS
systems)
were
investigated.
The
microscopic
examination
shows
that
was
mainly
caused
by
gram-positive
short
branch
microorganisms,
fragments,
and/or
other
while
the
long
unbranched
filamentous
easy
to
cause
bulking.
high
throughput
sequencing
(HTS)
and
Linear
discriminant
analysis
effect
Size
(LEfSe)
identified
significant
discrepancy
bacteria
foams
compared
normal
AS.
Mycobacterium,
Mycobacteriaceae,
Nocardiaceae,
Actinomycetales,
Chryseobacterium,
Flavobacterium,
Ormithobacterium,
Flavobacteriaceae,
Portibacter
considered
as
dominant
foaming-potential
but
not
most
abundant
foams.
excessive
growth
(including
Haliscomentbacter,
Saprospiraceae,
Tetrasphra)
directly
led
bulking
with
volume
index
positively
correlated
retention
time
(SRT)
negatively
dissolved
oxygen
(DO),
which
means
SRT
low
DO
may
lead
instead
foaming.
It
also
found
Skermania,
Comamonadaceae,
Cloacibacterium,
Chryseobacterium)
had
positive
correlations
suspended
solids
mixed
liquid
solids,
negative
temperature
concentration.
International Journal of Ambient Energy,
Journal Year:
2025,
Volume and Issue:
46(1)
Published: March 7, 2025
The
lower
productivity
of
square
pyramid
solar
still
is
the
prime
impediment
to
its
worldwide
applicability.
An
attempt
has
been
made
improve
utilising
novel
augmented
technique
–
funnel
integrated
with
wick
material.
funnels
were
attached
basin
still,
and
one
end
material
was
spread
over
upper
portion
surface
funnel,
while
other
dipped
into
saline
water
in
basin.
At
1,
2
3
cm
depth,
impact
materials
(black
colour-painted
jute
cloth,
black
melton
wool
cotton
cloth)
inclination
angles
(15°,
20°
25°)
investigated.
For
each
case,
three
sets
experiments
carried
out
for
days
a
row
four
alike
stills
under
weather
conditions
(20.61°
N
72.91°
E)
winter
season.
maximum
achieved:
2.1432
L/m2
at
2.5368
1
angle
25°
cloth
2.8032
without
cloth.
