Polyaniline-Au nanoparticles modified glassy carbon electrode and its catalytic research towards hydrogen peroxide

A novel hydrogen peroxide sensor was prepared by immobilizing Au nanoparticles on a glassy carbon electrode (GCE) modified with a polyaniline (PANI) film. PANI was first electropolymerized on a bare and freshly-cleaned GCE, and then Au nanoparticles were electroadsorbed to the PANI film by immersing...

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Bibliographic Details
Published in:Fēnxī huàxué 2007-11, Vol.35 (11), p.1639-1642
Main Authors: Huang, Hai-Ping, Zhang, Yu-Mei, Sun, Dan-Zi, Zhu, Guo-Yi
Format: Article
Language:Chinese
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Summary:A novel hydrogen peroxide sensor was prepared by immobilizing Au nanoparticles on a glassy carbon electrode (GCE) modified with a polyaniline (PANI) film. PANI was first electropolymerized on a bare and freshly-cleaned GCE, and then Au nanoparticles were electroadsorbed to the PANI film by immersing the PANI/GCE in the colloidal solution containing Au nanoparticles. The entire preparation process was observed by Scanning Electron Microscopy (SEM). The SEM images indicated that Au nanoparticles of 16 nm in size are uniformly distributed into PANI film. The immobilized Au nanoparticles exhibited an excellent electrocatalytic response toward the reduction of H2O2. Under optimum conditions, the linear range of the sensor was 1.2 mumol/L to 0.55 mmol/L, and the detection limit was 0.35 mumol/L (S/N=3). Moreover, the sensor exhibits the fast response, high sensitivity and long-term stability.
ISSN:0253-3820