Synthesis of hollow copper oxide by electrospinning and its application as a nonenzymatic hydrogen peroxide sensor

► We prepared cupric acetate/polyacrylonitrile composite nanofibers by electrospinning. ► Hollow CuO particles were obtained after the calcinations of nanofibers. ► The CuO modified electrode displayed excellent results in H2O2 determination. ► The H2O2 sensor had low detection limit and high sensitivity. ► The CuO modified can be applied to the determination of real samples.