The synthesized carbon-based composites, i.e., SF, SI, and SFI, showed, first, that the band-gap values are in the range of 1.92–2.85 eV and, second, a clear trend in the band-gap values with respect to the metal content was not observed.
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Efficient Visible-Light Photocatalysis and Antibacterial Activity of TiO<sub>2</sub>-Fe<sub>3</sub>C-Fe-Fe<sub>3</sub>O<sub>4</sub>/Graphitic Carbon Composites Fabricated by Catalytic Graphitization of Sucrose Using Natural Ilmenite.
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