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Photocatalytic degradation of organic dyes by Er3+: YAlO3/Co- and Fe-doped ZnO coated composites under solar irradiation

  • Photochemistry and Magnetochemistry
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Abstract

In this work, the Er3+: YAlO3/Co- and Fe-doped ZnO coated composites were prepared by the sol-gel method. Then, they were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDX). Photo-degradation of azo fuchsine (AF) as a model dye under solar light irradiation was studied to evaluate the photocatalytic activity of the Er3+: YAlO3/Co- and Fe-doped ZnO coated composites. It was found that the photocatalytic activity of Co- and Fe-doped ZnO composites can be obviously enhanced by upconversion luminescence agent (Er3+: YAlO3). Besides, the photocatalytic activity of Er3+: YAlO3/Fe-doped ZnO is better than that of Er3+: YAlO3/Co-doped ZnO. The influence of experiment conditions, such as the concentration of Er3+: YAlO3, heat-treatment temperature and time on the photocatalytic activity of the Er3+: YAlO3/Co- and Fe-doped ZnO coated composites was studied. In addition, the effects of solar light irradiation time, dye initial concentration, Er3+: YAlO3/Co- and Fe-doped ZnO amount on the photocatalytic degradation of azo fuchsine in aqueous solution were investigated in detail. Simultaneously, some other organic dyes, such as Methyl Orange (MO), Rhodamine B (RM-B), Acid Red B (AR-B), Congo Red (CR), and Methyl Blue (MB) were also studied. The possible excitation principle of Er3+: YAlO3/Co- and Fe-doped ZnO coated composites under solar light irradiation and the photocatalytic degradation mechanism of organic dyes were discussed.

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Authors and Affiliations

  1. College of Chemistry, Liaoning University, Shenyang, 110036, China

    Yang Chen, Chunxiao Lu, Liang Tang, Yahui Song, Shengnan Wei & Jun Wang

  2. College of Environment, Liaoning University, Shenyang, 110036, China

    Yang Rong & Zhaohong Zhang

Authors
  1. Yang Chen
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  2. Chunxiao Lu
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  3. Liang Tang
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  4. Yahui Song
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  5. Shengnan Wei
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  6. Yang Rong
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  7. Zhaohong Zhang
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  8. Jun Wang
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Correspondence to Jun Wang.

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Chen, Y., Lu, C., Tang, L. et al. Photocatalytic degradation of organic dyes by Er3+: YAlO3/Co- and Fe-doped ZnO coated composites under solar irradiation. Russ. J. Phys. Chem. 90, 2654–2664 (2016). https://doi.org/10.1134/S0036024416130203

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  • DOI: https://doi.org/10.1134/S0036024416130203

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