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TiO_2 nanoparticles were homogeneously coated on multi-walled carbon nanotubes by hydrothermal deposition,this nano- composite 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 weU defined,stable and nearly reversible cycle voltammetric peaks.The electron transfer between Mb and electrode surface,Ks of 3.08s~(-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 83.10μmol/L,which shows a large catalytic activity of Mb in the TiO_2/MWCNTs film to H_2O_2.
TiO 2 nanoparticles were homogeneously coated on multi-walled carbon nanotubes by hydrothermal deposition, this nano-composite 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 show a pair of weU 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. electrocatalytic reductions of hydrogen peroxide were studied, the apparent Michaelis-Menten constant was calculated to be 83.10 μmol / L, which shows a large catalytic activity of Mb in the TiO 2 / MWCNTs film to H 2 O 2.