Non-enzymatic SnO2-nanowire/GCE amperometric sensor for H2O2 sensing

In this paper, SnO2-nanowire was synthesized and constructed as non enzymatic sensor to detect hydrogen peroxide (H2O2). In 0.1 M PBS, the prepared SnO2-nanowire/GCE amperometric sensor exhibits a well performance against H2O2, with the linear detection range of 1.4 μM ∼ 6.66 mM and detection limit of 0.34 μ M. This superior electrochemical sensing performance is mainly due to the mesoporous structure, large specific surface area, and high conductivity of the SnO2 nanowire. Theoretical calculations indicate that the adsorption capacity of SnO2 (110) crystal surface for H2O2 is superior to that of SnO2 (101) crystal surface. In addition, the sensor can detect hydrogen peroxide in tap water and orange juice, showing its potential applications.