fig4
![Solid-state NMR of active sites in TiO<sub>2</sub> photocatalysis: a critical review](https://image.oaes.cc/aee4ec06-4c22-4959-90f1-d08b90ca3a45/cs4012.fig.4.jpg)
Figure 4. Experimental static 47Ti and 49Ti NMR spectra of anatase using the QCPMG pulse sequence. (A) The ordinary QCPMG pulse sequence; (B) the devised 49Ti-selective pulse sequence; and (C) the devised 47Ti selective pulse sequence. Reproduced with permission from[95]. Copyright 2006, Elsevier. NMR: Nuclear magnetic resonance; QCPMG: quadrupolar Carr-Purcell Meiboom-Gill.