Synthesis of graphene/zirconium oxide nanocomposite photocatalyst for the removal of rhodamineB dye from aqueous environment

In this study, we have synthesized graphene/zirconium oxide nanocomposites (Gr@ZrO2-NC) by employing an alkaline method using green sodium hydroxide, as a reductant. The structural, optical, thermal, electrical, and photocatalytic properties of Gr@ZrO2-NC were studied. The characterization data confirmed that the zirconium nanoparticles (ZrO2-NPs) were successfully incorporated into the graphene sheets. X-ray diffraction analysis ensured that the ZrO2-NPs have a monoclinic structure. Thermogravimetric and differential scanning calorimetric analyses revealed that higher thermal stability owing to the strong interaction between ZrO2-NPs and graphene. The Gr@ZrO2-NC have also used for the photocatalysis of a Rhodamine B (RhB) dye under aqueous environment. Obtained data showed the efficient removal of RhB dye under UV light irradiation through the production of reactive oxygen species (ROS). The present study could open up promising avenues for substitution of toxic reducing agents for the production of Gr@ZrO2-NC and their potential environmental applications. (C) 2015 Elsevier B.V. All rights reserved.