demonstrates the CL emission spectra for luminol–H2O2
CL system in the presence of CuO nanosheets and cloxacillin
sodium. As can be seen from Fig. 6, the maximum emission for
the luminol–H2O2 and luminol–H2O2–CuO nanosheets is located
at 425 nm and only the intensity of CL spectrum is increased for
luminol–H2O2–CuO nanosheets CL system. Based on these results,
it can be proposed that the main emitter of the luminol–H2O2 CL
system in the presence of CuO nanosheets is still the 3-AMP*. So,
the enhancement effect of CuO nanosheets can be related to the
accelerated production of 3-AMP and 3-AMP*, leading to the higher
CL intensities