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- W2617492043 abstract "The peroxidase-like catalytic activity of MoS2 nanomaterials has been utilized for colorimetric bioassays and medical diagnostics. However, the application of peroxidase-like catalytic activity of MoS2 nanomaterials in environmental analysis was seldom explored. Herein, copper ions were found to inhibit the peroxidase-like catalytic activity of MoS2 nanosheets, which can catalyze the oxidation of 3, 3', 5, 5'-tetramethylbenzidine by H2O2 to produce a colorimetric product. Based on this finding, a simple sensitive colorimetric method for the detection of copper ions was developed. In the presence of copper ions, the absorbance and color of the solution decreased with the increasing concentration of copper ions. The color of the solution can be used to semi-quantitative on-site assay of copper ions by naked eyes. A linear relationship between the absorbance and the concentration of copper ions was observed in the range of 0.4-4.0μmolL-1 with a detection limit of 92nmolL-1, which was much lower than the maximum contaminant level of copper in drinking water legislated by the Environmental Protection Agency of USA and the World Health Organization. The method was applied to detect copper ions in environmental water samples with satisfactory results." @default.
- W2617492043 created "2017-06-05" @default.
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- W2617492043 date "2017-10-01" @default.
- W2617492043 modified "2023-09-23" @default.
- W2617492043 title "Colorimetric assay of copper ions based on the inhibition of peroxidase-like activity of MoS 2 nanosheets" @default.
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- W2617492043 doi "https://doi.org/10.1016/j.saa.2017.05.071" @default.
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