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Abstract Au nanoparticals and TiO2 nanosheets co-modified reduced graphene oxide nanocomposite (Au-TiO2NSs-rGO) have been synthesized through a simple synthetic route and employed to immobilize hemoglobin (Hb) in order to fabricate… Click to show full abstract
Abstract Au nanoparticals and TiO2 nanosheets co-modified reduced graphene oxide nanocomposite (Au-TiO2NSs-rGO) have been synthesized through a simple synthetic route and employed to immobilize hemoglobin (Hb) in order to fabricate a mediator-free biosensor. The experimental results reveal that the Au-TiO2NSs-rGO can be an immobilization support for Hb, affording good protein stability and bioactivity. Meanwhile, due to the special structure of Au-TiO2NSs-rGO, the direct electron transfer of Hb was facilitated and the resulting biosensor displays good performance for the detection of H2O2, with both a wide linear range of 7.5~250 μM and a low detection limit of 3 μM, as well as fast response and good stability.
Journal Title: Materials Letters
Year Published: 2020
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