Microwave assisted synthesis of a noble metal-graphene hybrid photocatalyst for high efficient decomposition of organic dyes under visible light

•Pt/graphene nanocomposites were synthesized via facile, fast, and scalable microwave irradiation method.•MB and Rh.B were used as sample dye solutions.•The Pt/graphene nanocomposites displayed distinctly enhanced photocatalytic activities.•UV–vis spectroscopic analysis was carried out to measure decomposition effect.

We report fast and facile synthesis of Pt/graphene nanocomposite via microwave assisted techniques. The “as-prepared” composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) with an energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM), UV–vis absorbance spectra analysis, diffuse reflectance spectra (DRS) analysis and Raman spectroscopic analysis. The visible light photo catalytic activities of Pt/graphene nanocomposite were tested by rhodamine B (Rh.B) and methylene blue (MB) as a standard model dyes. These analysis provide a promising development toward graphene based high efficient photocatalyst under visible light as an energy source.