This technology involves a manufacturing method for obtaining hematite nanocubes embedded with alloy nanoparticles by depositing a gold-palladium alloy onto Prussian blue nanocubes made from metal cyanides, followed by heat treatment, and a nitrophenol reduction catalyst using the same.
p-Nitrophenol, used in the production of dyes, pesticides, and pharmaceuticals, is classified as a priority toxic pollutant by the U.S. EPA, yet it continues to be discharged through industrial wastewater. There has been a lack of catalytic materials capable of efficiently reducing and removing this substance while allowing for repeated use.
This technology creates magnetic hematite catalysts embedded with alloy nanoparticles smaller than 10nm by depositing gold-palladium via galvanic displacement without external reducing or stabilizing agents, followed by heat treatment in air. The synergistic electron transfer between the alloy and hematite effectively reduces nitrophenol, and the catalyst can be recovered using magnetism for multiple reuses. It can be applied to wastewater treatment in dye and pharmaceutical plants, reducing both toxic organic pollutant purification costs and catalyst consumption.
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