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- W2316647466 abstract "UV light irradiation of TiO2 (λ > 320 nm) in a mixed solution of AgNO3 and S8 has led to the formation of Ag2S quantum dots (QDs) on TiO2, while Ag nanoparticles (NPs) are photodeposited without S8. Photoelectrochemical measurements indicated that the Ag2S photodeposition proceeds via the preferential reduction of Ag+ ions to Ag0, followed by the chemical reaction with S8. The application of this in situ photodeposition technique to mesoporous (mp) TiO2 nanocrystalline films coated on fluorine-doped SnO2 (FTO) electrodes enables formation of Ag2S QDs (Ag2S/mp-TiO2/FTO). Ag2S/mp-TiO2/FTO has the interband transition absorption in the whole visible region, while in the spectrum of Ag/mp-TiO2/FTO, a localized surface plasmon resonance absorption of Ag NPs is present centered at 490 nm. Ag2S QD-sensitized photoelectrochemical cells using the Ag2S/mp-TiO2/FTO and Ag/mp-TiO2/FTO photoanodes were fabricated. Under illumination of one sun, the Ag2S photoanode cell yielded H2 at a rate of 0.8 mL·h–1 with a total conversion efficiency of 0.29%, whereas the Ag/mp-TiO2/FTO photoanode is inactive." @default.
- W2316647466 created "2016-06-24" @default.
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- W2316647466 date "2011-05-09" @default.
- W2316647466 modified "2023-10-14" @default.
- W2316647466 title "Photodeposition of Ag<sub>2</sub>S Quantum Dots and Application to Photoelectrochemical Cells for Hydrogen Production under Simulated Sunlight" @default.
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- W2316647466 doi "https://doi.org/10.1021/la200587s" @default.
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