Microwave-assisted synthesized renewable carbon nanofiber/nickel oxide for high-sensitivity detection of H2O2

In the present study, carbon nanofibe (CNFs) with a highly defective structure were prepared via microwave pyrolysis of H 2 O 2 activated alder wood. The nickel oxide nanoparticles (NiO NPs) were anchored on the surface of the carbon nanofibers with the aid of microwave hydrothermal treatment . The electrochemical reactivity of the carbon nanofiber/nickel oxide electrode was evaluated for nonenzymatic H 2 O 2 detection and exhibited a fast response speed (within 1 s), high sensitivity (304.2 µA cm −2  mM −1 ), wide linear working range (0.1 µM to 3489.9 µM), low detection limit (0.57 µM), and good reproducibility, anti-interference and stability. For tap water, the prepared electrode was shown the recovery and RSD of H 2 O 2 between 94.7 and 98.9 % and 2.6–5.4 %, respectively as well the recovery and RSD of H 2 O 2 in river water samples reached 101.2–104 % and 2.8–4.7 %, respectively. The catalytic mechanism of hydrogen peroxide by using the prepared carbon nanofibers/nickel oxide was analyzed.