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Photocatalytic activity of BiFeO3/ZnFe2O4 nanocomposites under visible light irradiation

机译:明光照射下BifeO3 / ZnFe2O4纳米复合材料的光催化活性

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摘要

Herein, BiFeO3/ZnFe2O4 nanocomposites were synthesized via a glyoxylate precursormethod using a two-pot approach. Phase evolution is investigated by X-ray diffraction and Raman spectroscopy, which confirm that no impurity phases are formed between BiFeO3 and ZnFe2O4 following calcination at 600 degrees C. The specific surface area characterized by N-2 adsorption-desorption isotherms decreases from 30.56 to 13.13 m(2) g(-1) with the addition of zinc ferrite. In contrast, the magnetization increases from 0.28 to 1.8 emu g(-1) with an increase in the amount of ZnFe2O4. The composites show strong absorption in the visible region with the optical band gap calculated from the Tauc's plot in the range from 2.17 to 2.22 eV, as measured by diffuse reflectance spectroscopy. Furthermore, the maximum efficiency for the photodegradation of methylene blue under visible light is displayed by the composite containing 25 wt% ZnFe2O4 due to the synergic effect between BiFeO3 and ZnFe2O4, as confirmed by photoluminescence spectroscopy.
机译:在此,使用双罐方法通过乙氧基化物前体识别合成BifeO 3 / ZnFe2O4纳米复合材料。通过X射线衍射和拉曼光谱研究相位演化,这证明了在600℃的煅烧后BifeO3和ZnFe 2 O 4之间形成杂质相。特征在于N-2吸附 - 解吸等温线的比表面积从30.56降至13.13 M(2)G(-1)加入铁素体。相反,磁化量从0.28到1.8 emu g(-1)增加,随着ZnFe2O4的量增加。复合材料在可见区域中显示出强烈的吸收区域,其中通过漫反射光谱法测量的从2.17至2.22eV的绘制曲线的光带间隙。此外,由于BifeO3和ZnFe2O4之间的协同作用,通过光致发光光谱证实,含有25wt%ZnFe2O4的复合材料显示出可见光下的亚甲基蓝光降解的最大效率。

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  • 来源
    《RSC Advances》 |2018年第13期|共8页
  • 作者单位

    Iran Univ Sci &

    Technol Sch Met &

    Mat Engn Tehran Iran;

    Iran Univ Sci &

    Technol Sch Met &

    Mat Engn Tehran Iran;

    Iran Univ Sci &

    Technol Sch Met &

    Mat Engn Tehran Iran;

    Iran Univ Sci &

    Technol Sch Met &

    Mat Engn Tehran Iran;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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