One-pot synthesis and hydrogen peroxide electrochemical sensing of 3D TiO2/MnO2 nanorods assembled microspheres.

Nanorods assembled 3D microspheres of TiO₂/MnO₂ were prepared via a simple one-pot hydrothermal approach. The resultant composite material exhibited remarkable electrocatalytic activity for hydrogen peroxide (H₂O₂) in comparison to each single component. The electrochemical sensor constructed with TiO₂/MnO₂ exhibited a linear relationship within the range 0.0001–5.6 mmol·L⁻¹ for H₂O₂. The limit of detection (LOD) and sensitivity for H₂O₂ were 0.03 µmol·L⁻¹ (S/N = 3) and 316.6 µA (mmol·L⁻¹)⁻¹ cm⁻². Moreover, this sensor can be employed to detect trace amount of H₂O₂ in serum and urine samples successfully, supporting an insight and strategy for a more sensitive electrochemical sensor. [ABSTRACT FROM AUTHOR]