Fig. 4.
a DRS spectra of SrTiO3/Bi5O7I nanocomposites and b the Tauc plot of (Ahν)1/2 versus hν the pure Bi5O7I and 30 wt% SrTiO3/Bi5O7I nanocomposite, the Tauc plot of (Ahν)2 versus hν the pure SrTiO3 inset picture of b
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