Feasibility Study on The Use of Reduced Graphene Oxide-Iron Oxide Composite for Removal of Hexavalent Chromium in Wastewater
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Abstract
This research has studied the ability of the reducing graphene oxide-iron oxide composite (Fe2O3-x%RGO) to get rid of hexavalent chromium in wastewater by preparing a composite sample between reducing graphene oxide-iron oxide by the solvothermal method Then take the sample substance that has been analyzed for morphology with SEM. The structure can be analyzed with XRD. The optical properties and the photocatalytic efficiency studied with UV-vis machines. Examining the magnetic properties using VSM. The SEM analysis results show that iron oxide particles spread on the surface of graphene oxide and insert between layers of graphene oxide. In the section XRD found that the reducing graphene oxide-iron oxide composite substances show the structure of the hematite iron oxide (Fe2O3) and the effect of VSM showing the ferro-magnetic properties. The effect of UV-vis can bring the absorbance of the sample substance can be analyzed that the reducing graphene oxide-iron oxide composite substances has an energy gap between 2.50 – 2.80 electron volts. In addition, the analysis of the photocatalytic efficiency of the reducing graphene oxide-iron oxide composite substances in the removal of hexavalent chromium in wastewater found that the composite substance Fe2O3-20%RGO is best able to get rid of hexavalent chromium solution. And the decrease in hexavalent chromium concentration (Cr (VI)) makes it known the efficiency of the photocatalytic of the sample.
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