Preparation and characterization of monometallic (Au) and bimetallic (Ag/Au) modified-titania photocatalysts activated by visible light

▶ A reverse micelles environment promotes formation of Au- and Ag/Au-modified titania photocatalysts active in visible light. ▶ Composites with bimetallic nanoparticles showed higher level of photoactivity than composites with both metals deposited individually. ▶ Enhanced photoactivity is promoted with increase of gold size nanoparticles. ▶ The size of TiO2 particles introducing into the microemulsion reaction environment determined gold nanoparticles size.