Yurtsever, Husnu ArdaErzin, KubilayCiftcioglu, Muhsin2025-01-062025-01-0620230921-51071873-494410.1016/j.mseb.2023.1168822-s2.0-85171887571https://doi.org/10.1016/j.mseb.2023.116882https://hdl.handle.net/20.500.14669/2865Copper doped and lanthanide-copper co-doped titania powders were prepared by sol-gel technique and the effects of co-doping on the photocatalytic reduction and oxidation activities of titania were investigated in this work. Characterization studies indicated that a reduced structure was formed due to the presence of Ti3+ species in copper doped titania powder and a more stable structure was formed when lanthanides were used as co-dopants. Copper doped powder had a significantly higher activity in photocatalytic hydrogen production (1037 mu mol/g/h) than the co-doped powders (similar to 400 mu mol/g/h). The oxidation activities of co-doped powders however were determined to be about 2 times higher than that of the copper doped powder. The decrease in the reduction activity was attributed to the decrease in the number of Ti3+ sites, whereas the increase in oxidation activity was probably a result of the increase in the surface area and dye adsorption due to lanthanide co-doping.eninfo:eu-repo/semantics/closedAccessPhotocatalysisOxidation/reductionLanthanideCopperCo-dopingTitaniaArticleQ1298WOS:001156756700001Q2