Study of the behavior and determination of phenol Based on modified carbon pa s te electrode with nickel oxide-nitrogen carbon quantum dots using cyclic voltammetry

The behavior of phenol was studied and determined using the modified carbon paste electrode (MCPE) with nickel oxide nanoparticles doped by nitrogen quantum dots as nanoadsorbent (NiO - NCQD) cyclic voltammetry (CV). MCP manufactured in a laboratory. consisted 12% (NiO-NCQD), ­ 44% graphite powder paraffin oil to get carbonate paste. Cyclic can provide information; such: diffusion coefficient (D), charge transfer (α.nα), mass transport (mtrans) found that coefficient, reduction increasing concentration solution, constant K0 when increased solution. Also, highest occupied molecular orbital (HOMO), lowest unoccupied (LUMO), Gibbs free energy (ΔG) are calculated. In this study, EHOMO=4.92eV, ELUMO=0.32eV, ΔG=-4.17 were considered. drinking water samples from Latakia city analyzed based on NiO-NCQD adsorbent MCPE method (NiO-NCQD/MCPE). sample achieved less than quantitative detection limit (LOQ), proposed procedure validated spiking samples.