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(a) XRD patterns and (b) FTIR spectra of synthesized products: Nano-SiO2, Nano-SiO2/C, PPy, and PPy@Nano-SiO2/C nanocomposites; (c) Raman spectra; and (d) thermogravimetric analysis curves under an air atmosphere for synthesized Nano-SiO2/C and PPy@Nano-SiO2/C nanocomposites.
