Facile Detection of Naphthalene with a 5,10,15,20-tetrakis(4-methoxyphenyl)-21H,23H-Porphine Nickel (II)/N-(1-Naphthyl) Ethylenediamine Dihydrochloride Renewable Graphene Oxide Paste Electrode

Abstract

We report the fabrication of a new paste electrode based on 5,10,15,20-tetrakis(4- methoxyphenyl)−21H,23H-porphine nickel (II) (NiTPP) and N-(1-Naphthyl)ethylenediamine dihydrochloride (N-NEDDH) for the electrochemical detection of naphthalene. The electrochemical behaviour of the modified N-NEDDH/NiTPP/GO/CPE was studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV). Under the optimal conditions, the modified sensor presented a wide linear range from 1 × 10−8 to 1 × 10−5 mol l−1 in the detection of naphthalene, with a 3 × 10−9 mol l−1 detection limit. Other polycyclic aromatic hydrocarbons (PAHs), like phenanthrene, anthracene, fluorene and pyrene showed little interference on the detection. It also demonstrated a good applicability on naphthalene determination from four types of water samples, with good recovery rates.