Electrochemiluminescence of luminol on Ti/TiO2 NT electrode and its application for pentachlorophenol detection

Abstract

This work demonstrates for the first time the electrochemiluminescence (ECL) of luminol on a Ti/TiO₂ NT electrode and its analytical application for the detection of pentachlorophenol (PCP). Luminol emits stable and intensive light on the Ti/TiO₂ NT electrode at −0.6 V, and PCP is found to be able to inhibit the ECL intensity. PCP is detected based on the inhibition of ECL intensity. The proposed method exhibits good reproducibility, wide-range linearity (0.3 pM to 3 μM), and high sensitivity with a limit of detection (LOD) of 0.1 pM (S/N = 3). The possible inhibition mechanism has also been discussed.