Advances in Engineering Advances in Engineering features breaking research judged by Advances in Engineering advisory team to be of key importance in the Engineering field. Papers are selected from over 10,000 published each week from most peer reviewed journals.
Seonghyuk Ko, Chandra K. Banerjee, Jagannathan Sankar
Volume 42, Issue 3, April 2011
Abstract
We have investigated photochemical synthesis and visible light induced catalytic activity of nanosized silver (Ag) doped titania (TiO2). Synthesis of the composite was achieved by photochemical reduction of a mixture of P25 Degussa TiO2 and silver nitrate (AgNO3) solution under ultraviolet (UV) irradiation. Ag nanoparticles less than 3 nm in diameters were well dispersed on the surface of TiO2. The resulting photocatalytic material was characterized by various analytical techniques and their photocatalytic activity was evaluated by decomposition of methylene blue (MB) dye solution under visible light irradiation. The composite nanoparticles exhibited enhanced visible light-induced photocatalytic activity compared to that of pure TiO2. The enhanced activity is attributed to simultaneous effects of nano-Ag deposits by increasing the absorption capacity in visible region and acting as electron trappers to promote charge separation of photoinduced electrons (e−) and holes (h+).
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