Abstract
Anodic electrochemiluminescence (ECL) emission was for the first time observed from noble metal nanoparticles under coreactants. In this work, we present a novel ECL sensor based on Pt nanoclusters/graphene (Pt NCs/GR) hybrid with triethanolamine (TEA) as the coreactant for the trace detection of copper ion (Cu2+). GR significantly enhanced the anode ECL signal, due to its superior electron conduction. The ECL intensity could be greatly weakened by addition of Cu2+. The proposed protocol offered a highly sensitive, selective and recyclable method for detection of Cu2+ with a wide linear range from 1.0×10−4 to 2.0×10−1mg/L and a low detection limit of 1.0×10−4mg/L. Furthermore, the practicability of the ECL sensor in real water sample was also tested, showing that the ECL sensor based on Pt NCs/GR could be a promising alternative method for the monitoring of the Cu2+ in real sample.
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