Table 1: Surface area, pore volume, and pore size of samples prepared from precursors with different N : Ti molar ratios, fired at 250°C, 3 h, and 500°C 1 min. Ramp: 10°C/min.

SampleSurface area m2/gPore volume cm3/gPore size Å

N : Ti, 0 (TiO2)520.08866
N : Ti, 2 : 1400.06856
N : Ti, 4 : 1260.05163
N : Ti, 8 : 1170.03464