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A methodology to discriminate between hydroxyl radical-induced processes and direct charge-transfer reactions in heterogeneous photocatalysis

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Academic year: 2021

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Figure 1. Trend with pH of the photocatalytic degradation rates of  PhOH, HBz and HSal (initial concentration 0.5 mmol L 1 ), in the  presence of 0.2 g L 1  TiO 2  P25 (a) and W (b)
Figure 2. Photocatalytic degradation rates of PhOH, HBz and HSal  (initial concentration 0.25 mmol L 1 ), with and without addition of  10 mmol L 1  t-butanol, in the presence of 0.2 g L 1  TiO 2  P25 (a)  and W (b) at pH 3, adjusted with HClO 4
Figure  3.  Initial  photocatalytic  degradation  rates  of  PhOH  (a),  HBz (b) and HSal (c) as a  function of substrate concentration, in  the presence of 0.2 g L 1  TiO 2  (P25 or W) at pH 3, adjusted with  HClO 4
Figure 5. Photocatalytic degradation rate of 25 µmol L 1  HSal, in  the presence of the four tested photocatalysts (P25, W, P1, P2) at  different loading values

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