Synthesis and Characterization of Polyhedron-like Ag/AgCl Photocatalyst
Keywords:
Polyhedron morphology, Ag/AgCl, Metallic Ag nanoparticle, PhotocatalystAbstract
Polyhedron-like Ag/AgCl photocatalyst was synthesized through ion-exchange reaction between AgNO3 and ZrCl4 in the presence of vinyl acetate monomer acting as controlling agent. The obtained Ag/AgCl particles showed polyhedron shape with an average size of about 1-2 µm. The UV-visible study presented that polyhedron-like Ag/AgCl had visible light absorption at 470 nm and 600 nm due to the surface Plasmon resonance (SPR) of metallic Ag nanoparticles. The atomic ratio of Ag:Cl elements from EDX spectrum was higher than 1:1 suggesting the presence of metallic Ag coexisting with AgCl. The photocatalytic properties of the obtained product were investigated by evaluating on photodegradation of a model pollutant rhodamine B (Rh B), indicating that the polyhedron-like Ag/AgCl crystals exhibited a much higher photocatalytic activity than simple AgCl and commercial AgCl. The excellent photocatalytic activities could be attributed to the morphology and the surface Plasmon resonance of Ag/AgCl.
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