Enhanced chemiluminescence of the luminol-hydrogen peroxide system by colloidal cupric oxide nanoparticles as peroxidase mimic

► Cupric oxide nanoparticles enhance the chemiluminescence of luminol-H2O2 system. ► The effect could be attributed to the peroxidase-like activity of CuO nanoparticles. ► The proposed method could be used as a sensitive detection tool for glucose.