%0 Journal Article %T Visible Light Photocatalysis with Rare Earth Ion-Doped TiO2 Nanocomposites %A Himanshu Narayan %A Hailemichael Alemu %A Lijeloang Setofolo %A Lebohang Macheli %J ISRN Physical Chemistry %D 2012 %I Hindawi Publishing Corporation %R 10.5402/2012/841521 %U http://dx.doi.org/10.5402/2012/841521