A hemoglobin encapsulated titania nanosheet modified reduced graphene oxide nanocomposite as a mediator-free biosensor

- TiO2NS-rGO nanocomposites with TiO2NSs perpendicular to rGO have been synthesized.
- The nanocomposite was used to immobilize Hb to fabricate mediator-free biosensor.
- The biosensor displays a wide linear range of 1-15,000 μM for nitrite.
- The biosensor exhibits an extremely low detection limit of 10 nM for H2O2.