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. 2018 Oct 25;11(11):2090. doi: 10.3390/ma11112090

Figure 4.

Figure 4

(a) Mott–Schottky plots of treated-TiO2 and TiO2 at 5 kHz in 1 mol·dm−3 AlCl3/1 mol·dm−3 KCl; (b) Mott–Schottky plots of the treated TiO2 electrode at 2, 5 and 10 kHz.