Pure TiO 2 , N- and Cu-doped and double-doped (Cu, N) samples were synthesized via sol–gel route in order to investigate the local and average structure of the crystalline TiO 2 synthesized under different pH conditions. Samples are mainly constituted of anatase phase, even though low but significant amounts of secondary brookite grew in most samples. A detailed structural characterization was performed by means of synchrotron X-ray elastic scattering experiments; structural data of the different samples were obtained by means of the Rietveld refinement, whereas insights about their local structure were gained by means of the pair distribution analysis.
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Martinelli et al. (2018) studied this question.
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