Effects of Ag and Pt on photocatalytic degradation of endocrine disrupting chemicals in water

Photocatalytic activity of silver-modified titanium dioxide at solid–liquid and solid–gas interfaces

“…Miscellaneous behaviour was observed in the case of Ag-TiO 2 samples, silver enhanced the rates of sucrose oxidation due to the improved charge separation, however it posses similar activities to bare titania for salicylic acid and phenol decomposition [24]. Natural oestrogen's decomposition revealed no effect of silver addition, which also supports the theory on substrate and metal specificity in the organic compound's degradation [7].…”

“…The effect of the doping agent in the degradation efficiency is not evident. Positive effect of additives in the decomposition of different organic compounds has been published [2][3][4][5][6][7][8][9], but opposite results have been also reported [1,7,9]. This miscellaneous behaviour can be explained by the difference in the morphology, crystal structure, specific surface area and the surface density of the OH groups of the studied TiO 2 catalysts, due to the various preparation methods applied in their synthesis [22].…”

“…There was also observed, that some metals on TiO 2 surface can have no influence or even a detrimental effect on the photocatalytic degradation of investigated organic pollutants [1,7]. According to a possible explanation for this negative impact presented in the literature metal deposits may occupy the active sites on the TiO 2 surface at higher loadings causing the photocatalyst to lose its activity.…”

“…photosensitization) resulting in enhanced photocatalytic activity is one of the most important aspects of heterogeneous photocatalysis. Deposition of different metals (like Pt, Pd, Au, Ag, Fe, Nb and Cu) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] or oxides such as WO 3 [17] onto titanium dioxide has been widely used as a technique to extend the light absorption to the visible region.…”

Heterogeneous Photocatalysis: Recent Advances and Applications

“…), compared with the individual components in the mixture. Ohtani and other studies [46][47][48] on the other hand, isolated the individual components of P25 by selective acid dissolution and assessed the single components for a range of photocatalytic reactions. The studies concluded, at least for P25, a less probable synergistic effect beyond the photocatalytic activity of the individual components.…”