Abstract
Herein, a facile route to fabrication of carbon nanofibers/polyaniline/Au nanofibers (CPANFs) with tunable densities of gold nanoparticles (AuNPs) was proposed, and the potential application of the CPANFs as efficient electrochemical detector of H2O2 was demonstrated. First, carbon nanofibers (CNFs) were successfully obtained through the carbonization procedure using electrospun polyacrylonitrile (PAN) nanofibers as a precursor. Then, polyaniline (PANI) nanorods were coated on the CNFs by an in situ polymerization of aniline, in which AuNPs were homogenously distributed via gold-thiol binding interactions. Finally, an aqueous nafion solution was used to attach HRP-modified CPANFs to the pretreated glassy carbon electrode (GCE) for H2O2 detection. The fabricated electrochemical detectors for H2O2 exhibited a high sensitivity for detection of H2O2 with a detection limit of 0.18 μM at signal-to-noise ratio of 3.
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