Doan, N.M., Estrellan, C.R., Purnomo, A., Gallardo, A., Salim, C. and Hinode, H. 2012. Characterization and Photocatalytic Activity of Nano-TiO2 Doped with Iron and Niobium for Turquoise Blue Dye Removal. ASEAN Journal of Chemical Engineering. 12, 1 (Dec. 2012), 34-41.