Ag deposited mixed phase titania visible light photocatalyst -Superiority of Ag-titania and mixed phase titania co-junction

摘要

Photocatalyst nanoparticles of Ag deposited anatase titania with plasmonic junction and mixed phase titania with homo-junction were prepared and their physico-chemical characterization was done using different analytical techniques. Their photocatalytic performance in visible light was found to be comparable albeit ascribable to different junction characteristics with identical consequences in terms of photoactivity. It has been shown that co-junction of the combination of both in plasmonic Ag nanoparti-cle deposited mixed phase titania has a multiplying effect and yields a superior visible light photocatalyst. The combination showed 3.4 times more activity than the two in isolation in degradation of methylene blue. Standard photocatalyst Degussa P25 (DP25) is also used as a reference catalyst to compare the photoactivity.