Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Апрель 25, 2025
The
catalytic
reduction
of
4-nitrophenol
(4-NP)
to
4-aminophenol
(4-AP)
is
vital
for
environmental
remediation.
This
study
synthesizes
and
assesses
silver-reduced
graphene
oxide
(Ag/rGO)
silver-magnetite-reduced
(Ag/Fe2O4/rGO)
nanocomposites
4-NP
reduction.
Various
reducing
agents-ascorbic
acid
(AA),
hydrazine
hydrate
(HH),
sodium
borohydride
(SBH),
cellulose
nanofibers
(NFC)-were
employed
under
reflux
(R),
hydrothermal
(H),
ultrasonic
(U)
conditions.
Drying
methods
(oven-drying
(O)
freeze-drying
(F))
CTAB
as
a
stabilizer
were
explored
optimize
Ag
NP
distribution.
characterized
using
FT-IR,
XRD,
FE-SEM,
EDS,
TEM,
BET,
TGA,
ICP-OES,
VSM.
XRD
confirmed
formation
with
crystallite
sizes
12-23
nm.
FE-SEM
TEM
showed
uniform
distribution
cubic
Fe2O4
spherical
NPs
(approximately
50
nm)
on
GO.
Ag/Fe2O4/rGO(O)-AA-U-F
nanocomposite
demonstrated
the
highest
activity,
pseudo-first-order
rate
constant
(k)
1.81
min-1
specific
activity
parameter
(k')
180.77
min-1.g-1.
exhibited
mesoporous
structure
high
surface
area
(226.9
m2/g)
nanoparticle
rGO.
combination
ascorbic
(AA)
(F)
yielded
superior
performance
due
their
porous
dispersion.