چکیده
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This study presents a novel photocatalytic system
for photocatalytic degradation of Eriochrome black-T (EBT) dye
via green light-emitting diode (LED) light exposure. This
photocatalyst is comprised of nanoscale components, i.e., poly-
(vinyl alcohol) (PVA), magnetic iron oxide nanoparticles (Fe3O4
NPs), gold NPs (Au NPs), and zinc oxide nanorods (ZnO NRs),
rendering an active high surface area. The most highlighted
property from the structural facet is the superparamagnetic
behavior of Fe3O4 NPs, which provides a facile collection of
magnetic photocatalyst NPs from the reaction flask and is
successfully recycled eight times without considerable reduction
in catalytic behavior. Briefly, the photocatalytic degradation at its
highest efficiency reached 51.4% (10 ppm dye solution, 5.0 mL) and 64.75% (8 ppm dye solution, 5.0 mL) utilizing 10 mg of the designed photocatalyst (formulated as Fe3O4@PVA−Au/ZnO), a magnetic photocatalytic system under green LED light (7 W, 526 nm) exposure for 60 min. Besides, the photocatalytic degradation mechanism of the EBT dye by the as-prepared photocatalyst was proposed. Based on the obtained results, the presented photocatalytic method was recommended for scaling up and large-scale exploitation for the purification of the water resources.
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