Abstract
Polyaniline (PANI) nanotubes were successfully synthesized using the hydrothermalmethod via an in situ polymerization. In the process, a fibrillar complex ofFeCl3 and methyl orange (MO), acting as the reactive self-degraded templates, directed thegrowth of PANI on its surface and promoted the assembly into nanotubular structures. Byintroducing PANI nanotubes into Au colloid, Au nanoparticles (NPs) could bedecorated onto the PANI nanotube surface through the electrostatic effect. Themorphology of the nanotubes and the number of decorated Au NPs could becontrolled effectively by adjusting the experimental conditions. The resulting productswere characterized by transmission electron microscopy (TEM), x-ray diffraction(XRD), x-ray photoelectron spectroscopy (XPS) and Fourier transform infraredspectroscopy (FTIR). In addition, the electrocatalytic activity of the compositestowards the oxidation of NADH (nicotinamide adenine dinucleotide) was studied byimmobilizing PANI/Au composites on the surface of a glassy carbon electrode (GCE).
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