Visible-Light-Active Titania Photocatalysts: The Case of N-Doped TiO₂s—Properties and Some Fundamental Issues

Table 1

Comparison of calculated band gaps of undoped rutile and anatase TiO₂ with experimental and calculated values reported by others (𝐸_BG is the direct band gap). From Wang and Lewis [55].

Source	𝐸BG (rutile), eV	𝐸BG (anatase), eV
Wang and Lewis	3.05	3.26
Experiments	3.06 [56]	3.20 [58], 3.42 [59]
Other calcns	2.00 [57], 1.78 [60]	2.22 [60], 2.00 [46]