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- W646689673 abstract "Abstract Much more attentions were paid to the anatase TiO 2 than rutile due to its higher photoactivety with a larger band gap. However, it is usually ignored that the relative narrow band gap of rutile TiO 2 benefits to the increasing in the responsive wavelength range. In this work, spherical activated carbon-supported Er 3+ :Al 2 O 3 -doped rutile TiO 2 (Er 3+ :Al 2 O 3 /TiO 2 -SAC) was synthesized by a sol–gel method using tetrabutyl titanate as titanium precursor, and erbium nitrate and aluminum nitrate as dopant sources. Long-wavelength visible light from a light-emitting diode source was upconverted to ultraviolet light and short-wavelength visible light by Er 3+ dopant, which could then be absorbed by the synthesized photocatalyst that contained rutile TiO 2 . This resulted in higher photocatalytic activity of samples with rutile than those with anatase. A response surface methodology based on the central composite design model was used to determine the optimum synthesis conditions: Er concentration, 0.07 mol‱; Al concentration, 0.08 mol%; and calcination temperature, 700 °C. The catalyst achieved a 90.0% removal efficiency for methyl orange (MO) with a reaction rate of 18.98 × 10 −3 min −1 at an initial MO concentration of 500 mg L −1 in 2 h under visible-light irradiation." @default.
- W646689673 created "2016-06-24" @default.
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- W646689673 date "2015-10-01" @default.
- W646689673 modified "2023-09-25" @default.
- W646689673 title "Synthesis of Er3+:Al2O3-doped and rutile-dominant TiO2 composite with increased responsive wavelength range and enhanced photocatalytic performance under visible light irradiation" @default.
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- W646689673 doi "https://doi.org/10.1016/j.molcata.2015.06.016" @default.
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