Sol–Gel Synthesis of Manganese Doped Titanium Oxide Nanoparticles for Electrochemical Sensing of Hydroquinone.

Abstract

Here we report development of a hydroquinone (HQ) electrochemical sensor using nanosized manganese doped titanium oxide as a composite material. The nanomaterial was synthesized with sol gel method using calculated amount of Mn and Ti atoms resulting into a composite metal oxide. Morphological observations indicated a uniform particle size and shape distribution with almost spherical shape and size of about 20–30 nm. While structural analysis indicated formation of mixed phase of TiO₂ and MnO forming MnTiO₃. The synthesized nanomaterial was used as a matrix for fabrication of hydroquinone electrochemical sensor and tested over a wide range from 2 mM to 10 mM. The developed electrochemical sensor exhibited sensitivity of 2.96 μA mM⁻¹ (23.55 μA mM⁻¹ cm⁻²) with a detection limit of 7.5 μM, which is rarely reported for such composite nanomaterial.