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• W4225134112 startingPage "133189" @default.
• W4225134112 abstract "In this work, we present core/shell [email protected]2 nanoparticles-based visual sensing strategy for mercury ion (Hg2+) detection. The MnO2 shell of [email protected]2 nanoparticles catalyzes the oxidation reaction between tetramethylbenzidine (TMB) and oxygen in the air, generating blue derivative (oxTMB) with an absorption peak at 650 nm. Glutathione (GSH) inhibits the formation of oxTMB, reversing the reaction and turning it back into colorless TMB molecules. While in the existence of Hg2+, GSH binds to Hg2+ due to the strong affinity between the Hg2+ and the -SH, and in this situation, [email protected]2 catalyzes the oxidation of TMB to make the solution become blue. Using the colorimetric sensor, the detection limit of Hg2+ reached as low as 0.473 nM by UV–vis spectroscopy and 1 nM under the naked eye observation, which is lower than toxicity level of Hg2+ (10 nM) formulated by the U.S. Environmental Protection Agency." @default.
• W4225134112 created "2022-05-01" @default.
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• W4225134112 date "2022-09-01" @default.
• W4225134112 modified "2023-10-02" @default.
• W4225134112 title "Colorimetric determination of Hg(II) ions based on core/shell Au@MnO2 nanoparticles with oxidase-like activity" @default.
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• W4225134112 doi "https://doi.org/10.1016/j.molstruc.2022.133189" @default.
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