《Ultrasonic synthesis and photocatalytic performance of metal-ions doped TiO2》.pdf

Materials Research Bulletin 48 (2013) 672–681 Contents lists available at SciVerse ScienceDirect Materials Research Bulletin jo u rn al h om ep age: ww w.els evier.c o m/lo c ate/mat res b u Ultrasonic synthesis and photocatalytic performance of metal-ions doped TiO2 catalysts under solar light irradiation Huajun Feng *, Liya E. Yu, Min-Hong Zhang Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore 117576, Singapore A R T I C L E I N F O A B S T R A C T Article history: Eight metal-ions doped TiO (M-TiO ) were successfully synthesized by an ultrasonic method, including 2 2 Received 3 March 2012 Fe, Co, Ce, Cr, Mn, Mg, Ni and Ag ions. Among them, the 1% Mg–TiO2 shows the highest photocatalytic Received in revised form 11 September 2012 efficiency under solar light, which was determined by degrading rhodamine B (RhB) molecules in an Accepted 6 November 2012 aqueous solution. The synthesized M-TiO2 samples were characterized by XRD, BET Surface area, TEM, Available online 16 November 2012 XPS and diffuse reflectance spectrum. Effects of synthesis conditions and characterized properties on photocatalytic efficiency of the M-TiO2 were investigated comprehensively. A positive correlation Keywords: between specific surface area and photocatalytic efficiency of the M-TiO2 w