Hydrophilic polymer/polypyrrole/graphene oxide nanosheets with different performances in electrocatalytic applications to simultaneously determine dopamine and ascorbic acid
作者： Hui Mao , Chunguang Ji , Meihong Liu , Ying Sun , Daliang Liu
DOI: 10.1039/C6RA23341D
关键词:
摘要: Hydrophilic polymers (HP) functionalized polypyrrole/graphene oxide nanosheets (HP/PPy/GO) were successfully prepared by covalently modifying polyacrylamide (PAM), polyacrylic acid (PAA) and polyvinylpyrrolidone (PVP) on the surface of PPy/GO containing vinyl groups. Besides significantly improving dispersivity in water, different chemical properties among three HP with hydrophilic groups further resulted performances obtained electrochemical biosensors (PAM/PPy/GO, PAA/PPy/GO PVP/PPy/GO modified glassy carbon electrodes (GCEs)) electrocatalytic applications to simultaneously determine dopamine (DA) ascorbic (AA). PAM/PPy/GO GCEs exhibited good responses distinguish DA from AA their mixture at certain concentrations, which cannot be achieved GCE, due Particularly, compared PAA/PPy/GO, can act as a steady electrode material selectivity sensitivity that two substrates lower may between electron-donating amide electron-withdrawing carboxyl The electronic effects group difference transmission capability electrons released oxidation reaction AA. Therefore, GCE sensor high for
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