Influence of La3+ Ions on the Photo-Catalytic Activity of TiO2 Films Prepared by Micro-Plasma Oxidation Method
Micro-porous TiO2 ceramic films have been grown on titanium plates by the micro-plasma oxidation method with the electrolyte of H2SO4. The influence of La3+ ion addition in the electrolyte on the photo-catalytic activities was investigated. The results showed that titanium dioxide thin films produced with La3+ addition electrolyte exhibit higher photo-activity than pure electrolyte for the oxidation of rhodamine B. The removal of rhodamine B reaches 90% for 30 min when La3+ addition concentrate is 0.05 g/L. Experimental results of X-ray diffraction and atom force microscopy show that the increase in activity is related to change in the lattice parameters and cell volume.
Wei Pan and Jianghong Gong
X. H. Wu et al., "Influence of La3+ Ions on the Photo-Catalytic Activity of TiO2 Films Prepared by Micro-Plasma Oxidation Method", Key Engineering Materials, Vols. 336-338, pp. 1949-1952, 2007