Abstract
Iron local environment was investigated by EXAFS in Fe- and (Fe, Eu)-doped TiO2 photocatalysts, prepared by hydrothermal and high-energy ball milling (HEBM) routes. In the case of the hydrothermal samples, the substitution of Ti4+ by Fe3+ ions was evidenced. For the samples prepared by HEBM, the iron environment corresponds to mixed metallic and oxidized (FeO, α-Fe2O3) configurations, without a clear evidence of iron incorporation into the TiO2 lattice. This could be related to the catalyst contamination by iron microparticles detached from the balls during milling process.
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