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• W2328725251 abstract "A novel nanoparticle autocatalytic sensor for the detection of Ag+ and Cu2+ has been constructed based on the oxidative ability of Ag+ and Cu2+ toward o-phenylenediamine (OPDA). Ag+ and Cu2+ can be reduced to zerovalent silver and copper, respectively, and then such zerovalent Ag and Cu species form silver and copper nanoparticles that can catalyze the reaction between OPDA and Ag+ and Cu2+. In the reaction, OPDA is oxidized to 2,3-diaminophenazine (OPDAox), which has a fluorescence emission at 568 nm. Under the optimal conditions, Ag+ and Cu2+ can be detected in the concentration ranges from 60 nM to 60 μM and from 2.5 nM to 25 μM, respectively. Through this facile approach, Ag+ and Cu2+ can be detected down to 60 nM and 2.5 nM, respectively. In addition, the sensor is utilized for the detection of Ag+ and Cu2+ in sewage, and we have obtained very good results that are consistent with those of inductively coupled plasma–mass spectroscopy (ICP-MS). Moreover, such a nanoparticle autocatalytic sensor is applied to test paper for the detection of Ag+ and Cu2+ with the naked eye. With such test paper, Ag+ and Cu2+ could be detected at levels as low as 0.06 nmol and 0.3 nmol, respectively, with detection ranges of 0.06–60 nmol for Ag+ and 0.3–60 nmol for Cu2+, under the irradiation of UV light (365 nm). The test paper could be potentially used in the rapid detection of Ag+ and Cu2+ in real samples." @default.
• W2328725251 created "2016-06-24" @default.
• W2328725251 creator A5013799893 @default.
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• W2328725251 date "2011-05-27" @default.
• W2328725251 modified "2023-10-17" @default.
• W2328725251 title "A Nanoparticle Autocatalytic Sensor for Ag⁺ and Cu²⁺ Ions in Aqueous Solution with High Sensitivity and Selectivity and Its Application in Test Paper" @default.
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• W2328725251 doi "https://doi.org/10.1021/ac2008465" @default.
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