The Affect Of Carbonaceous Debris The Electrochemical Behaviors Of Graphene

In this thesis, we try to investigate the effect of the adsorption of carbonaceousdebris for the electrochemical property. In order to verify this we did two experiment:we compared the detection to the cadmium ion of electrochemically reduced grapheneoxide in the presence and absence of carbonaceous debris; next we exploring theelectrode surface fouling from the oxidation of NADH. We investigate the effect ofthe debris for the electrode fouling. Detailed contents are as follows:(1) We prepared graphene oxide (GO) by modified Hummers method (We calledit a-GO). Then treated it with sodium hydroxide solution to remove the carbonaceousdebris (We called it b-GO). And then used excessive HCl to make black aggregatethoroughly protonated. And we named it r-GO. And then electrochemically reduceda-GO (or b-GO, r-GO), Then we use a-RGO (b-RGO, r-RGO) to do the strippinganalysis of cadmium. We found that the carbonaceous debris is disadvantageous forthe detection to the cadmium ion.(2) As we known, the application of graphene in electrochemical NADH sensorsis widely. But the stability of the electrodes in respect of surface fouling from theoxidation of NADH is too difficult to solve. For investigate the effect of the debris forthe electrode fouling, we reduced the a-GO and b-GO electrode via electrochemicallymethod. And named them a-RGO and b-RGO. We compared the voltammetricresponses and found that b-RGO electrode have the better stability.