A novel nanosheets assembled porous fusiform Co2P2O7 for sensitive electrochemical detection of ultratrace As(III) ions

Abstract

A facile and low-cost method was used to synthesize a novel nanosheets assembled porous fusiform Co2P2O7 for ultrasensitive electrochemical sensing detection of As(III) in water. The porous fusiform Co2P2O7 formed by small nanosheets exhibits a three-dimensional porous structure with a rough surface and good dispersion, facilitating a well-connected electron transfer path and providing numerous electroactive sites to bind with As(III). The proposed electrochemical sensor exhibited a high sensitivity of 91.04 µA µg/L cm−2 and a low detection limit of 0.087 µg/L towards As(III) in 0.1 M HAc-NaAc buffer (pH 5.0). Furthermore, it exhibited great potential for the electrochemical detection of As(III) in tap water.