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- W2067826128 abstract "Two kinds of hybrid metal oxide quantum dots, Cu x O and Fe x O, were successfully anchored on TiO 2 blocks by a facile, low-cost and large scale reflux method. The resultant photocatalysts (Cu x O/TiO 2 and Fe x O/TiO 2 ) were characterized by transmission electron microscope (TEM), Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV–vis absorption spectrum, and their photocatalytic performances were evaluated by photocatalytic decoloration of methylene blue (MB) solution under simulated sunlight and visible light (λ > 420 nm) irradiation. The results showed that hybrid metal oxide quantum dots Cu x O (or Fe x O) were dispersed uniformly on TiO 2 blocks. Both Cu and Fe are in mixed valences state (Cu + and Cu 2 + , Fe 2 + and Fe 3 + , respectively). Cu x O/TiO 2 and Fe x O/TiO 2 demonstrated high photocatalytic ability whether they were under simulated sunlight or under visible light (λ > 420 nm) irradiation, which can be confirmed from the measurement of the amount of hydroxyl radicals ( OH). Based on the above results, the mechanisms of enhanced photocatalysis on Cu x O/TiO 2 and Fe x O/TiO 2 under simulated sunlight and visible light were proposed. • Hybrid metal oxide quantum dots, Cu x O and Fe x O, were anchored on rutile TiO 2 . • “Hybrid” refers to that Cu and Fe were in mixed valence state. • Composites were prepared by a facile, low-cost and large scale reflux method. • Cu x O/TiO 2 and Fe x O/TiO 2 showed much higher activity than TiO 2 itself. • The mechanisms of photocatalysis on Cu x O/TiO 2 and Fe x O/TiO 2 were proposed." @default.
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- W2067826128 date "2013-09-01" @default.
- W2067826128 modified "2023-10-16" @default.
- W2067826128 title "Hybrid metal oxides quantum dots/TiO2 block composites: Facile synthesis and photocatalysis application" @default.
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- W2067826128 doi "https://doi.org/10.1016/j.powtec.2013.05.014" @default.
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