Raman study of the variation in anatase structure of TiO2 nanopowders due to the changes of sol–gel synthesis conditions
Source abstract
Abstract
TiO2 nanopowders were produced by sol–gel technique under different synthesis conditions. XRD results have shown that obtained nanopowders are in anatase phase, with the presence of a small amount of highly disordered brookite phase, whereas nanocrystallite size and amount of brookite slightly depend on sol–gel synthesis conditions. Raman measurements confirm these results. The analyses of the shift and width of the most intensive anatase Eg Raman mode by phonon confinement model suggest that anatase crystallite size should be in the range between 11 and 15 nm, what is in excellent correlation with XRD results. Obtained results have shown that Raman spectroscopy is a highly sensitive method for the estimation of anatase crystallite size as well as brookite content in TiO2 nanopowders synthesized by variable sol–gel synthesis conditions.
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Research context
OpenAlex topics: TiO2 Photocatalysis and Solar Cells · Advanced Photocatalysis Techniques · Electronic and Structural Properties of Oxides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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