Abstract
In this study, Ag-Au bimetallic composite type nanoparticles (∼13 nm) were prepared in aqueous media using Aegle marmelos leaf extract. Upon etching with ammonia solution, the formed ∼13 nm particles were reduced to ∼5 nm spherical alloy type Ag-Au with higher Au content (∼82.0%). In addition, with Tetrabutyl orthotitanate introduction in the same reaction media, Ag-Au-TiO2 heterostructures (∼9 nm) were obtained. The synthesized nanoparticles of various types were analyzed by UV–Vis. and photoluminescence (PL) spectroscopy, HR-TEM, and FTIR techniques. It was found that among the synthesized particles, Ag-Au-TiO2 heterostructures displayed promising PL properties, superior photocatalytic activity towards SDBS degradation, and antimicrobial activity against the studied bacterium, Escherichia coli. The multifunctionality of these particles may be useful for many industrial applications such as catalysis to waste water treatment.
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