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Synthesis, characterization and photocatalytic activity of titano-phosphate glasses

Abdelillah Shaim, Elhassan Amaterz, Yassine Naciri, Aziz Taoufyq, Bahcine Bakiz, Mohamed Ezahri, Abdeljalil Benlhachemi, Abdelkarim Ouammou, Abdelkrim Chahine


Photocatalytic activity of (50-x/2)Na2O-xTiO2–(50-x/)P2O5 glasses (0 ≤ x ≤ 10 mol%) has been studied with an increase in the TiO2 content using UV-Visible spectrophotometry. Thermal properties were carried out from DTA measurement, and the variation of glass structure was investigated by Fourier Transform Infrared (FT-IR). The first addition of the TiO2 up to 3 mol% entrained depolymerization of the phosphate skeleton (PO3) chains in the binary 50Na2O–50P2O5 glass, resulting in poor cross-linking, which in turn the glass network becomes less rigid and the glass transition temperature (Tg) was decreased. Beyond this value, FT-IR reveals the formation of P–O–Ti bonds, which increases the cross-link density in the glass network and therefore increases Tg of the glasses. The photocatalytic activity results showed that these glasses ensure the discoloration of Rhodamine B by a removal efficiency of about 94% after 4h of irradiation.

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