Effect of Ce:Ti ratio and cerium salts on the properties of mesoporous Ti-Ce oxides and their photocatalytic activityNadrah, Peter (Avtor) Knap, Mateja (Avtor) Vikram Sagar, Tatiparthi (Avtor) Sever Škapin, Andrijana (Avtor) Lavrenčič Štangar, Urška (Avtor) Ti-Ce oxidesevaporation-induced self-assemblyisopropanol oxidationphotocatalysismesoporous materialTo investigate the influence of different CeO$_2$ precursors and Ce:Ti ratios, we have synthesised 8 mesoporous Ti-Ce oxides via the evaporation-induced self-assembly (EISA) method with Ce:Ti ratios between 0.2 and 20 mol%. The materials exhibited type IV isotherms and a specific surface area of 140–180 m$^2$⋅g$^{−1}$ with pore diameters in range of 3–20 nm. The crystalline phases of materials comprised predominantly anatase with a significant decrease in overall crystalline content with increasing Ce:Ti ratio. Materials with higher Ce:Ti ratio showed an increased light absorption in the visible region. Although crystalline CeO$_2$ was not detected, the presence of Ce(IV) was confirmed by X-ray photoelectron spectroscopy. For the photocatalytic experiments, we compared these materials with the TiO$_2$-CeO$_2$ composites of our previously published syntheses to yield 16 samples synthesized via three synthesis approaches: (1) concurrent synthesis from titanium alkoxide and cerium salts in one pot, (2) synthesis of TiO$_2$ in the presence of previously-synthesised CeO$_2$ and (3) physical mixing of separately-synthesised TiO$_2$ and CeO$_2$. Samples produced by physically mixing the separately-synthesised TiO$_2$ and CeO$_2$ showed the best photocatalytic activity towards gaseous isopropanol degradation, while the samples with TiO$_2$ synthesised in the presence of CeO$_2$ showed the best photocatalytic stability.20252025-01-22 11:17:55Članek v reviji166707UDK: 54ISSN pri članku: 1873-4308DOI: 10.1016/j.cattod.2025.115204COBISS_ID: 223125507sl