| Preparation of ternary nanocomposite based on reduced graphene oxide, cerium oxide and chitosan for the electrocatalytic oxidation of bisphenol A |
| کد مقاله : 1064-CNF |
| نویسندگان |
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سپیده شفائی *، رحیم محمدرضائی دانشگاه شهید مدنی تبریز |
| چکیده مقاله |
| Recently, reduced graphene oxide has attracted a lot of attention because of remarkable electrical and optical properties [1]. Metal oxides especially cerium oxide (CeO2) has been widely used as sensor and biosensor materials because of its hardness, high electrical conductivity, thermal and mechanical stability and catalytic behavior [2]. Chitosan (CS), as the second abundant natural polysaccharide extracted from the shells of crabs and shrimps, has usually been considered as one of the most promising hydrogel materials due to their excellent biological properties [3]. This paper reports the preparation of a triple nanocomposite based on reduced graphene oxide, cerium oxide and chitosan as a novel modified for electrocatalytic oxidation of bisphenol A as an important hazardous material. The prepared rGO-CS/Chit was carefully studied with FTIR, scanning electron microscopy, X-ray diffraction, electrochemical impedance spectroscopy and cyclic voltammetry techniques in details. Based on electrochemical impedance spectroscopy and cyclic voltammetry studies, the synergistic effect of these three compounds in the improve of efficiency of the rGO-CS/Chit was proved. To investigate the electrocatalytic behavior of the final modified electrode, the oxidation of bisphenol A (BPA) as a test sample was examined. The results show that the oxidation current density of bisphenol A in the rGO-CS/Chit is increased in comparison with other electrodes. Also, peak potential of the BPA in the rGO-CS/Chit shifted to less positive values high electrocatalytic response of the developed electrode. Using differential pulse voltmeter (DPV) method, the detection limit and linear range of the developed sensor were obtained to be 0.15 µM and 0.2-250 µM, respectively. Finally, the proposed sensor was successfully used to determine bisphenol A in various water samples. |
| کلیدواژه ها |
| Reduced graphene oxide, Cerium oxide, Chitosan, bisphenol A |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |