The photocatalytic properties of transition metal ion-doped TiO2 nanoparticles - Photocatalytic degradation of rhodamine B

The transition metal ion-doped TiO2 nanoparticles were prepared with hydrot hermal method, and the effects of doping different metal ions on the abilit y of TiO2 in photocatalyzing degradation of rhodamine B(RB) were studied, T he results showed that the doping of Fe3+, Co2+, Ni2+ and Cr3+ in TiO2 nano particles made the photocatalytic efficiency of the TiO2 particles reduce a nd the higher the initial content of Fe3+. the lower the ability of TiO2 in photocatalyzing the degradation of RE. But the doping of Zn2+ and Cd2+, es pecially Zn2+, made the photocatalytic efficiency of the TiO2 particles enh ance, showing a great increase of the rate constant(k) and the initial reac tion rate (r(ini)).