Preparation of carbon nanotube arrays nanocomposites filled with Prussian blue and electrochemical sensing of hydrogen peroxide

Abstract

In this work, A nanocomposite film composed of multi-walled carbon nanotube arrays (MWCNTA) filled with Prussian Blue (PB) was prepared, and it was successfully applied in the electrochemical Sensing of H₂O₂. The nanostructure of MWCNTA/PB was characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The electrochemical behavior was investigated by cyclic voltammetry (CV). The excellent catalytic reduction performance of H₂O₂ by MWCNTA/PB was observed and applied as a H₂O₂ electrochemical sensor. It is found that the linear detection range of the sensor is 10 μM to 110 μM and the sensitivity is 0.407 μA μM^–1, as well as the detection limit is 0.21 μM. The interference experiment results showed that uric acid, dopamine, glucose and ascorbic acid could not affect the electrochemical detection of H₂O₂, indicating that the sensor has good stability and anti-interference.

Keywords:

• Carbon nanotubes arrays
• Prussian blue
• nanocomposites
• hydrogen peroxide
• electrochemical sensing