Prof. Shancheng Yan Profile

Prof. Shancheng Yan

at Nanjing University of Posts and Telecommunications

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Proceedings Article | 4 December 2020 Paper

Fabrication of NiS2 nanomaterial for Ca2+, Mg2+ sensing

Zehui Peng, Yue Cao, Yuan Gao, Ka Wang, Haizeng Song, Shancheng Yan

Proceedings Volume 11617, 116170H (2020) https://doi.org/10.1117/12.2584569

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Water hardness refers to the total content of calcium and magnesium salts dissolved in water. It is one of the important monitoring indicators in the water treatment process. Water hardness testing is of great significance for low-loss, safe industrial production and healthy life. Therefore, it is urgent to find a new, more effective and low-cost method to accurately detect the concentration of calcium ions (Ca²⁺) and magnesium ions (Mg²⁺). We have prepared a new type of ion sensor based on NiS2 nanomaterials through experiments. In the experiment, the detection range of ion concentration is 1×10^-9 M~1×10^-7 M, with 0.1 M H₂SO₄ as the electrolyte, and the current density is 20 mA·cm^-2 . The minimum overpotential is -188 mV, indicating that the material has good electrochemical properties. Further electrochemical methods are used to detect the corresponding linear relationship between the overpotential/the reduction peak and the concentration of calcium and magnesium ions

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