one-step synthesis highly sensitive non-enzyme hydrogen peroxide sensor based on prussian blue/polyaniline/mwcnts nanocomposites

We have prepared a novel and sensitive electrochemical hydrogen peroxide sensor which is based on a glassy carbon electrode modified with prussian blue/polyaniline/multiwalled carbon nanotubes (pb/pani/mwcnts) nanocomposites. the synthetic process was very simple and facile through a one-step approach, while aniline plays the role of both the precursor of pani and the reductant for fecl3-k3[fe(cn)6]. the as-prepared nanocomposites were characterized by transmission electron microscopy and fourier transform infrared spectroscopy. besides, electrochemical techniques were used to evaluate the electrochemical performance of the pb/pani/mwcnts nanocomposite-modified electrode towards h2o2. the experiment results successfully confirmed that the pb nanoparticles were anchored on the surface of pani/mwcnts uniformly. the influence of various experimental parameters on the detection of h2o2 was studied in detail, as well. under optimum conditions, the developed h2o2 sensor had a linear response in the concentration range of 0.005–1.03 mm with a high sensitivity of 4018.57 ma mm−1 cm−2 and a detection limit of 1.7 mm. in addition, the fabricated h2o2 sensor showed excellent selectivity, reproducibility, and stability.