Abstract
Cationic iron (III) tetrakis-5, 10, 15, 20-(N-methyl-4-pyridyl)porphyrin (FeIIITMPyP) was intercalated into layered semiconductor KNb3O8 for the first time by ion-exchange method. FeIIITMPyP forms an inclined monolayer between Nb3O8− nanosheets and endues the nanocomposite with a pair of characteristic redox peaks of FeIIITMPyP. The FeIIITMPyP–Nb3O8− nanocomposite modified glass carbon electrode shows high electrochemical catalysis toward reduction of hydrogen peroxide with a linear range at low concentration and a detection limit of 1.75μM, the promising utilization of the nanocomposite as a material for biosensor was proposed.
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