Preparation of Er³⁺:YAlO₃/Fe-doped TiO₂–ZnO and its application in photocatalytic degradation of dyes under solar light irradiation
In this work, Er³⁺:YAlO₃/Fe-doped TiO₂–ZnO composite, a novel photocatalyst, was synthesized by ultrasonic dispersion and liquid boiling method and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Of which, as an upconversion luminescence agent, the Er³⁺:YAlO₃ can tra...
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Veröffentlicht in: | Desalination 2011-03, Vol.268 (1-3), p.68-75 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | In this work, Er³⁺:YAlO₃/Fe-doped TiO₂–ZnO composite, a novel photocatalyst, was synthesized by ultrasonic dispersion and liquid boiling method and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Of which, as an upconversion luminescence agent, the Er³⁺:YAlO₃ can transform the visible light in solar energy into ultraviolet light, satisfying the requirement of TiO₂–ZnO composite for photocatalytic degradation. The photocatalytic activity of Er³⁺:YAlO₃/Fe-doped TiO₂–ZnO composite was evaluated through the degradation of Acid Red B dye under solar light irradiation. The effects of preparation conditions such as Er³⁺:YAlO₃ content, heat-treated temperature and heat-treated time on the photocatalytic activity of Er³⁺:YAlO₃/Fe-doped TiO₂–ZnO composite were examined. In addition, the influences of solar light irradiation time, dye initial concentration and Er³⁺:YAlO₃/Fe-doped TiO₂–ZnO amount as well as organic dyes on the photocatalytic degradation were also investigated. The experimental results indicated that the Er³⁺:YAlO₃/Fe-doped TiO₂–ZnO composite can effectively utilize solar energy to degrade Acid Red B dye and its photocatalytic activity was much superior to that of Fe-doped TiO₂–ZnO composite under the same condition. |
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ISSN: | 0011-9164 1873-4464 |
DOI: | 10.1016/j.desal.2010.09.052 |