Preparation of nano Fe₂O₃-reduced graphene oxide composite and its determination of bisphenol A

The bisphenol A (BPA) is widely used in food packaging materials. It can cause endocrine disorders in human body and lead to abnormal immune and reproductive system, so it is very important to detect BPA in water. In this paper, the ferric oxide-reduced graphene oxide (Fe₂O₃-rGO) composite was synthesized and characterized by one step hydrothermal method. Based on the Fe₂O₃-rGO composite, the Fe₂O₃-rGO/glassy carbon electrode electrochemical sensor was constructed for the detection of BPA in water. The results of FTIR, XRD and SEM show that Fe₂O₃ nanoparticles are successfully attached to rGO. The electrochemical detection of BPA by differential pulse voltammetry (DPV) shows that the linear range of BPA is 0.1-100 μmol/L and the detection limit is 0.033 μmol/L (signal to noise ratio is 3). Meanwhile, the Fe₂O₃-rGO/glassy carbon electrode electrochemical sensor has good anti-interference ability to electroactive substances and common metal ions and the real sample detection results are ideal.