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. 2017 Jan 25;18(2):249. doi: 10.3390/ijms18020249

Figure 2.

Figure 2

The X-ray photoelectron spectroscopy (XPS) spectra recorded on P25 TiO2 (A); P25-1% Fe–N (B); and TiO2-1% Fe–N (pH ~8.5) (C) samples.