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- W3111123142 abstract "• A near-infrared-light-driven photoelectrochemical sensor is developed for probing Hg 2+ . • Bead chain-like Ag@Ag 2 S composites are prepared via one-step oil-bath route followed by photoreduction. • Ag 2 S and metallic Ag separately act as the sensitizer and Hg 2+ -recognition probe. • This PEC sensor can facilitate the detection of Hg 2+ with concentrations down to 0.50 pM. A near-infrared (NIR) light-driven photoelectrochemical (PEC) sensing platform was established for the quantitative assay of Hg 2+ using Ag@Ag 2 S nanocomposites. Ag 2 S quantum dots (QDs) with the bead-chain-like nanostructure were fabricated simply via one-step oil-bath route to be further deposited with metallic Ag through the photo-reduction method to yield Ag@Ag 2 S nanocomposites. It was found that Ag@Ag 2 S-based sensor could present more than twice larger PEC responses than the Ag 2 S-based one, due to the synergetic combination of metallic Ag with the surface plasmon resonance (SPR) effects and Ag 2 S QDs with the NIR-light-irradiated PEC properties. More importantly, the developed PEC sensor could display the photocurrent responses that are selectively inhibited in the presence of Hg 2+ by forming Ag-Hg amalgam to accelerate the recombination of photo-induced electron-hole pairs. Under NIR light, it can detect Hg 2+ in the concentrations linearly ranging from 0.0010 to 5.0 nM, with a limit of detection of about 0.50 pM. This work may guide a promising combination of Ag 2 S of NIR QDs with metallic Ag of SPR effects for designing various PEC sensing platforms for the complex environmental monitoring of different heavy-metal ions like Hg 2+ ." @default.
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- W3111123142 date "2021-04-01" @default.
- W3111123142 modified "2023-10-17" @default.
- W3111123142 title "Near-infrared light-driven photoelectrochemical sensor for mercury (II) detection using bead-chain-like Ag@Ag2S nanocomposites" @default.
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- W3111123142 doi "https://doi.org/10.1016/j.cej.2020.128154" @default.
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