Application of ozonation and silveration for heterogeneous photocatalytic degradation of an aromatic surfactant

•Silveration and O3 were applied for improvement of TiO2 based photocatalysis.•Silver-modified TiO2 increased only the hydroxylation rate of the model compound.•Joint ozonation and silveration led to highly synergic increase of mineralization.•Simultaneous and consecutive combinations of these methods were studied.•Ozonation resulted in the oxidative dissolution of the deposited silver.