fig15
Figure 15. (A) 15N MAS NMR spectra of 15N-doped TiO2 prepared by sol-gel methods; (B) 15N MAS NMR spectra of 15N-doped TiO2 monolayer and powders by direct nitridation. Reproduced with permission from[200]. Copyright 2007, American Chemical Society. MAS: Magic angle spinning; NMR: nuclear magnetic resonance.
