Cationic (V, Y)-codoped TiO2 with Enhanced Visible Light Induced Photocatalytic Activity for Photoelectrochemical Applications
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abstract
To utilize the wide spectrum of solar irradiations, an effective co-doping approach is applied to modify the photoelectrochemical properties of TiO2 by doping vanadium (transition metal) and yttrium (rare earth element). V and/or Y codoped TiO2 was prepared using hydrothermal method without any post calcination for crystallization. V, Y codoped TiO2 exhibited high absorption coefficient with enhanced visible light absorption compared to monodoped samples. All the prepared samples showed pure anatase phase and spherical morphology with uniform particle distribution. It is found that both the doped V and Y exist in the form of substitutional point defects replacing Ti atom in the lattice. The photocatalytic activity, evaluated by the degradation of methyl orange, displays that the codoped TiO2 sample exhibits enhanced visible light photocatalytic activity. The synergistic effects of V and Y drastically improved the visible light absorption and electron-hole pair's separation leading to the enhanced visible light catalytic activity.
