Figure 7From: Facile synthesis and enhanced visible light photocatalytic activity of N and Zr co-doped TiO2 nanostructures from nanotubular titanic acid precursors Degradation of propylene over 0.6% Zr/N-TiO 2 (500) synthesized from NTA and P25 respectively, as well as the N-NTA-TiO 2 and N-P25. Back to article page