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- W2026313818 abstract "This article reports the comparative activity studies of pristine and F-doped nano-ZrO2 in photostimulated heterogeneous processes. Both samples, synthesized via a one-step flame spray pyrolysis, possess similar specific surface area (∼73 m2/g) and crystallites size (15 nm), while the concentration of F-anions exists as steep gradient across the zirconia radius. Photostimulated adsorption of oxygen and hydrogen was chosen as probe reactions representing the reduction and oxidation parts of photocatalytic cycle. The active states lifetime of surface active centers on pristine ZrO2 were estimated to be 8.0 × 10−2 s for hydrogen photoadsorption and 8.7 × 10−2 s for oxygen photoadsorption. The corresponding values for F-doped ZrO2 were 2.3 × 10−2 s and 2.5 × 10−2 s, respectively. The effect of surface photoreactions on photoinduced defect formation was studied, and the spectral dependences of the quantum yield of corresponding surface photoreactions were also measured. Comparative analysis of the experimental data provided insights for the first time that F-doping does not create new types of electronic localized states within the nano-ZrO2 bandgap. Nevertheless, the presence of F-dopant alters the quantity of the pre-existing and photoinduced intrinsic defects in ZrO2, thus changing the efficiency of charge carriers recombination. The discussion of the experimental results is given within the frame of charge conservation law." @default.
- W2026313818 created "2016-06-24" @default.
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- W2026313818 date "2009-02-20" @default.
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- W2026313818 title "Spectroscopic Studies of Pristine and Fluorinated Nano-ZrO<sub>2</sub> in Photostimulated Heterogeneous Processes" @default.
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- W2026313818 doi "https://doi.org/10.1021/jp809992g" @default.
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