Comparison of photocatalytic performance of different types of graphene in Fe₃O₄/SnO₂ composites

We have reported the role of annealing temperature Fe₃O₄/SnO₂ nanocomposites as a photocatalyst for remove methylene blue (MB) dye from aqueous solution. However, how to enhanced the degradation performance of Fe₃O₄/SnO₂ nanocomposites is important to its photocatalytic application. Therefore, in this work Fe₃O₄/SnO₂ nanocomposites was combined with two different types of graphene materials (NGP and grahene) to improve the photocatalytic performance for remove methylene blue (MB) dye. Fe₃O₄/SnO₂/NGP and Fe₃O₄/SnO₂/graphene have been successfully synthesized by co-precipitation method. The influence of two types graphene on Fe₃O₄/SnO₂ nanocomposites properties were systematically investigated by means of X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and Thermal gravimetric analysis (TGA). Degradation of methylene Blue (MB) in aqueous solution was studied in detail under photocatalytic process. Effect of catalyst dosage (0.1-0.4 g/L) and scavengers on dye degradation were carried out to check the efficiency of photocatalyst. The results indicated Fe₃O₄/SnO₂/graphene displayed higher photocatalytic activity than other catalyst. The reusability tests have also been done to ensure the stability of the used photocatalyst.