Study on the synthesis of graphene/Fe2O3-TiO2 composite and its application as photocatalyst for waste treatment
Abstract
The graphene/Fe2O3-TiO2 composite material was synthesized from ilmenite ore and natural graphite. The synthesized graphene is in the form of sheets, multilayered, with a wrinkled surface morphology, having many folds. The Fe-Ti oxide particles have an average crystal size of 16.4 nm, and are evenly distributed on the graphene surface. The results of the adsorption isotherm curves show that the specific surface area of the graphene/Fe2O3-TiO2 composite material is 133.7 m²/g. The band gap energy value calculated using the Tauc plot is 2.867 eV; this value allows the composite material to have photocatalytic activity in the visible light region. The photocatalytic activity of the material was investigated through the photodegradation reaction of Methylene Blue (MB) under simulated sunlight conditions. The graphene/Fe2O3-TiO2 composite material is capable of degrading 100% of MB within a lamp irradiation time of 20 minutes.
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References
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