Figure 6From: Facile synthesis and enhanced visible light photocatalytic activity of N and Zr co-doped TiO2 nanostructures from nanotubular titanic acid precursorsDegradation of propylene over as-prepared catalysts under visible light irradiation. (a) x% Zr/N-TiO2(500), x = 0 to 10; (b) 0.6% Zr/N-TiO2 calcined at 400°C, 500°C, and 600°C.Back to article page