Regulation Of Fluorinated Graphene Structure And Its Electrochemical Performance

In recent years, halogenated graphite and halogenated graphene attracted wide attention, due to its excellent electrochemical performance, in which the fluorinated graphene can significantly increase the heterogeneous electron transfer rate in the electrochemical field has broad application prospects. In this paper, we have obtained the fluorinatedgraphite and fluorinated graphene from pre-oxidized graphite and graphene oxide, respectively. Then, the electrochemical properties of these two nanomaterials were studied by the modified glassy carbon electrode. In addition, different literatures on the excellent electrochemical properties of graphene recently presented a different view. In this paper, we studied the electrochemical properties of the purified graphene oxide, and put forward my own point of view. The main research works are shown as follows:1.The sodium-type purification of graphene oxide(bGONa) and hydrogen-type purification of graphene oxide(bGO) were obtained by alkaline treatment.The two nanomaterials were characterized and analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), field emission scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and so on. All the characterization results showed that carbonaceous debris adhered on the surface of grapheme oxide was removed,and by the two groups on the surfaces of different purification of graphene oxide.These two nanomaterials modified glassy carbon electrode to ferricyanide electrochemical probes to study the electrochemical properties of the modified electrode.Catechol and heavy metal Cd2+ of analytes, detection effect by comparison of the two different materials, demonstrating the influence of graphene surface containing oxygen groups on the electrochemical behavior of graphene.2.Pre-oxidized graphite as raw material for the preparation of a fluorinated graphite, and the structure was characterized by XPS, FTIR and other analytical tools.These the characterization results showed that fluorinated graphite was successfully prepared.The preparation of fluorinated graphite modified glassy carbon electrode to ferricyanide electrochemical probes to study the electrochemical properties of the modified electrode. This modified electrode was used for simultaneous determination of catechol (CC) and hydroquinone (HQ) in water. Effects of optimum conditions for the simultaneous determination of CC and HQ such as pH, scan rate and amount of drop coating were investigated.Under the optimized conditions, the modified electrode in a 1～150 μmol/L concentration range and peak height is linear, linear equations were Ipa(μA)=11.293+0.1047c (μmol/L) and Ipa(μA)=2.9898+0.03365c (μmol/L), the detection limits were 0.307 μmol/L and 0.428 μmol/L.3.Graphene oxide as raw material for the preparation of a fluorinated graphene, and the structure and the morphology was characterized by XPS, FTIR, SEM, TEM and other analytical tools. All the characterization results showed that fluorinated graphene was successfully prepared. The preparation of fluorinated graphene modified glassy carbon electrode to ferricyanide electrochemical probes to study the electrochemical properties of the modified electrode. This modified electrode was used for simultaneous determination of catechol (CC) and hydroquinone (HQ) in water. Effects of optimum conditions for the simultaneous determination of CC and HQ such as pH, scan rate and amount of drop coating were investigated.Under the optimized conditions, the modified electrode in a 1～40 μmol/L concentration range and peak height is linear, linear equations were Ipa(uA)=0.7985+0.5525c (μmol/L) and Ipa(μA)=4.582+0.6242c (μmol/L), the detection limits were 0.205 μmol/L and 0.267 μmol/L.