Abstract
Arsenic pollution is common in seafood, grains, fruits, vegetables and groundwater. Long-term intake of arsenic-contaminated food or water may lead to various health problems. In this study, a novel nanosheets assembled Co2P2O7 microrod was prepared via a simple one-step hydrothermal method for the electrochemical detection of As(III). The Co2P2O7 microrods showed superior electric conductivity, good dispersion and a unique layered structure, which provided numerous electroactive sites to bind with As(III) and promoted the direct oxidization of As(III) to As(V) on the modified electrode surface. The proposed electrochemical sensor showed a high sensitivity of 4.174 µA/µg L−1 and a wide linear range of 0 ∼ 30 µg L−1 for As(III) detection via differential pulse voltammetry method in 0.1 M HAc-NaAc buffer (pH 5.0). Additionally, it exhibited good repeatability, reproducibility, stability and selectivity for As(III) detection. Moreover, the proposed sensor exhibited satisfactory applicability in hairtail samples.
Published Version
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