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Preparation, characterization, and photocatalytic activity of La-doped TiO2 supported on activated carbon at the decomposition of methylene orange

  • Photochemistry and Magnetochemistry
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Abstract

A composite photocatalyst (La/TiO2/AC) has been prepared by supporting photoactive La-doped TiO2 (La/TiO2) on activated carbon (AC) via hydrolysis of tetrabutyl titanate (Ti(OC4H9)4) with La(NO3)3 · 6H2O and Ti(OC4H9)4 as precursors in the presence of activated carbon. The prepared photocatalysts were characterized by BET surface area, scanning electron microscopy (SEM), X-ray diffraction (XRD) and UV-vis absorption spectroscopy. The photocatalytic activities of the obtained photocatalysts under UV light are estimated by measuring the degradation rate of methylene orange in aqueous solution. The effect of La-doped content on the photocatalytic activity was studied and the result revealed that 0.2 mol % La/TiO2/AC exhibited highest photoactivity. In addition, the recyclability of the prepared photocatalyst was also confirmed, the photocatalytic activity of La/TiO2/AC remains about 86.5% of its activity as-prepared after being used four times. The photocatalyst therefore may be used as effective catalyst in photooxidation reactions and potentially applied for the treatment of water contaminated by organic pollutants.

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Correspondence to Jingping Qiu.

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Xing, J., Sun, X. & Qiu, J. Preparation, characterization, and photocatalytic activity of La-doped TiO2 supported on activated carbon at the decomposition of methylene orange. Russ. J. Phys. Chem. 89, 1108–1114 (2015). https://doi.org/10.1134/S003602441506014X

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  • DOI: https://doi.org/10.1134/S003602441506014X

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