Green synthesis of porous graphene-like nanosheets for high-sensitivity nonenzymatic hydrogen peroxide biosensor

Herein, the novel ficus-iacertiolia fruit-derived porous graphene-like nanosheets (PGNSs) with rich active functional groups were synthesized via a high-efficient and low-cost one-step carbonization technique for H 2 O 2 biosensor. Target electrode materials have promising porous structures with a large specific surface area (S a ) of 480.67 m 2  g −1 . The modified glassy carbon electrode (PGNSs/GCE) was constructed and exhibited excellent electrocatalytic activity, showing a high-efficiency detection of H 2 O 2 , high sensitivity of 6.17 μA mM −1  cm −2 , a low detection limit of as low as 2.75 μM and a wide linear range of 0.2–19 mM. Thus, this work demonstrates fundamental insights for the porous and active functional groups on electrodes, and provides a facile route to fabricate a highly sensitive H 2 O 2 sensor for practical aspergillus flavus diagnosis.