ZnO@Polypyrrole-P(VSANa) on flexible and wearable carbon felt as electrodes for nonenzymatic H2O2 sensor and supercapacitor applications

Herein, this work involves the synthesis and characterization of ZnO nanoparticles, which possess electroactive properties and are produced using an environmentally friendly and non-toxic synthesis method. The novelty of this study compared to the literature is that the flexible and wearable ZnO@Polypyrrole-P(VSANa) electrode, synthesized with the green synthesis approach, was used as a nonenzymatic sensor for H2O2 and its supercapacitor performance was examined. We report an H2O2 sensor developed with ZnO@Polypyrrole-Polyvinyl sulfonic acid sodium salt (ZnO@PPy-P(VSANa) coated carbon felt (CF) electrode and a symmetric supercapacitor fabricated with the same electrode using a hydrothermally produced ZnO@PPy-P(VSANa) coated carbon felt (CF) electrode. The linear ranges of the sensor to H2O2 were determined as 0.2-2.5 mu M and 2.5-100 mu M. The detection limit for H2O2 was calculated as 0.044 mu M. Real sample analyses of the sensor, whose efficiency was investigated for practical application, were performed on different real samples. Using the same electrode ZnO@PPy-P(VSANa) coated CF, a symmetric supercapacitor device operating in the potential range of 0-1.0 V in PVA-H3PO4 electrolyte was developed. A specific capacitance of 171.8 F g(-1) at a scan rate of 5 mV s(-1) was obtained for the resulting symmetric supercapacitor.