Abstract
In this paper, an up-conversion luminescence agent (Er3+:YAlO3), which can effectively transform the visible light in solar light into ultraviolet light, was prepared. Then, for a visible-light photocatalytic degradation reaction, the prepared Er3+:YAlO3 was coated by Co- and Fe-doped TiO2–ZnO films thorough sol–gel process, respectively, and the Er3+:YAlO3/Fe- and Co-doped TiO2–ZnO coated composites were obtained. The crystal forms, particle sizes, chemical compositions, and weight change process of the Er3+:YAlO3/Fe- and Co-doped TiO2–ZnO coated composites were analyzed by using XRD, TEM, SEM, EDX, and TG–DTA instruments. The photocatalytic activities of the Er3+:YAlO3/Fe- and Co-doped TiO2–ZnO coated composites were evaluated through the degradation of azo fuchsine under visible light irradiation. It indicated that the visible light photocatalytic reduction ratio of Fe- and Co-doped TiO2–ZnO composites were 47.8 and 67.9 %, while after adding 15 wt% Er3+:YAlO3, the reduction ratio reached 93.5 and 95.5 %, respectively. In addition, the photocatalytic effect of Er3+:YAlO3/Co-doped TiO2–ZnO is better than that of Er3+:YAlO3/Fe-doped TiO2–ZnO.
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Acknowledgments
The authors gratefully acknowledge the National Science Foundation of China (21371084), Shenyang Science and Technology Plan Project (F13-289-1-00), Key Laboratory Basic Research Foundation of Liaoning Provincial Education Department (L2015043) and the Innovation Team Project of the Education Department of Liaoning Province (LT2015012) for financial support. The authors also thank our colleagues and other students for their participating in this work.
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Lu, C., Chen, Y., Zhang, H. et al. Preparation of Er3+:YAlO3/Fe- and Co-doped TiO2–ZnO coated composites and their visible-light photocatalytic activity in degradation of some organic dyes. Res Chem Intermed 42, 4651–4668 (2016). https://doi.org/10.1007/s11164-015-2306-9
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DOI: https://doi.org/10.1007/s11164-015-2306-9