A novel bilayer film material composed of polyaniline and poly(methylene blue)

Electrically conducting polyaniline(PAn)/poly(methylene blue)(PMB) bilayer film was prepared by electrochemical polymerization of methylene blue on the PAn-coated Pt working electrode. The bilayer film electrode exhibits higher electrocatalytic activity towards oxidation of methanol than PAn electrode and PMB electrode in neutral and alkaline solutions. FTIR spectroscopy reveals PAn-unit is a main unit in the structure of the bilayer film. In addition, the PAn/PMB bilayer film has also been characterized by scanning electron microscopy (SEM), and X-ray photoelectron spectra (XPS), respectively.