Abstract

We demonstrated a biomimetic green synthesis of bimetallic Au – Ag nanoparticles (NPs) on graphene nanosheets (GNs). The spherical protein, ferritin ( Fr ), was bound onto GNs and served as the template for the synthesis of GN / Au – Ag nanohybrids. The created GN / Au – Ag nanohybrids were further utilized to fabricate a non-enzymatic amperometric biosensor for the sensitive detection of hydrogen peroxide ( H 2 O 2), and this biosensor displayed high performances to determine H 2 O 2 with a detection limit of 20.0 × 10-6 M and a linear detection range from 2.0 μM to 7.0 mM.

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