Abstract
TiO 2 nanoparticles were homogeneously coated on multi-walled carbon nanotubes by hydrothermal deposition, this nanocomposite may be a promising material for myoglobin immobilization in view of its high biocompatibility and large surface. The glassy carbon electrode modified with Mb-TiO 2/MWCNTs films exhibited a pair of well defined, stable and nearly reversible cycle voltammetric peaks. The electron transfer between Mb and electrode surface, Ks of 3.08 s −1, was greatly facilitated in the TiO 2/MWCNTs film. The electrocatalytic reductions of hydrogen peroxide were studied, the apparent Michaelis–Menten constant is calculated to be 83.10 μmol/L, which shows a large catalytic activity of Mb in the TiO 2/MWCNTs film to H 2O 2.
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