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Photocatalytic Degradation of Organic Dyes by a High Efficient TiO2-Based Catalysts Under Solar Light Irradiation

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Abstract

In this work, the Er3+:YAlO3/Fe-doped TiO2 composite, a high efficient TiO2-based photocatalyst, was synthesized by ultrasonic dispersion and liquid boil methods. Among which, the Er3+:YAlO3 is a kind of upconversion luminescence agent, which was prepared by nitrate-citric acid method. It can emit ultraviolet light under visible light excitation. The Er3+:YAlO3/Fe-doped TiO2 composite was characterized by X-ray diffraction and UV–vis spectral techniques. The degradation of Acid Red B dye was used to evaluate the photocatalytic activity of the Er3+:YAlO3/Fe-doped TiO2 composite under solar light irradiation. It was found that the photocatalytic activity of Er3+:YAlO3/Fe-doped TiO2 composite was much higher than that for the similar system with only Fe-doped TiO2. And the influencing factors, such as Er3+:YAlO3 content, irradiation time, initial concentration of Acid Red B, addition amount of Er3+:YAlO3/Fe-doped TiO2 and NaCl, on the photocatalytic degradation were also investigated. The Er3+:YAlO3 as upconversion luminescence agent can elevate the photocatalytic activity of Fe-doped TiO2 powder. Moreover, the Fe2+ ion can restrain the recombination of photogenerated electrons and holes. Thus, this Er3+:YAlO3/Fe-doped TiO2 composite is a useful material for the detoxification of wastewater because it can efficiently utilize solar light by converting visible light into ultraviolet light.

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Acknowledgments

The authors greatly acknowledge the National Natural Science Foundation of China, Liaoning Province Natural Science Foundation of Education Department and Liaoning Province Natural Science Foundation of Science and Technology Department for financial support. The authors also thank our colleagues and other students for their participating in this work.

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Authors and Affiliations

  1. Department of Chemistry, Liaoning University, 110036, Shenyang, People’s Republic of China

    Jun Wang, Jia Li, Chengwu Li, Yingpeng Xie, Rui Xu & Xiangdong Zhang

  2. Department of Pharmacy, Liaoning University, 110036, Shenyang, People’s Republic of China

    Liquan Zhang & Bin Liu

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  1. Jun Wang
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  2. Jia Li
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  3. Liquan Zhang
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  4. Chengwu Li
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  5. Yingpeng Xie
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  6. Bin Liu
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  7. Rui Xu
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  8. Xiangdong Zhang
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Correspondence to Jun Wang.

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Wang, J., Li, J., Zhang, L. et al. Photocatalytic Degradation of Organic Dyes by a High Efficient TiO2-Based Catalysts Under Solar Light Irradiation. Catal Lett 130, 551–557 (2009). https://doi.org/10.1007/s10562-009-0009-9

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  • DOI: https://doi.org/10.1007/s10562-009-0009-9

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