Durability of Ag-TiO₂ Photocatalysts Assessed for the Degradation of Dichloroacetic Acid

Figure 4

Degradation of DCA (shown as release of H⁺) using the prepared colloidal TiO₂ photocatalyst at pH 3 in 3 consecutive runs without intermittent washing between runs, 1st run (—), 2nd run (---), 3rd run (⋯), a 3rd run (-⋅-) with addition of 4 mM Cl⁻ before the run started, and slope () used for the determination of the photonic efficiency of each run with 𝐼≈3.39×10⁻²Einstein L⁻¹h⁻¹. The photocatalyst loading was 0.5 g/L.