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首页> 外文会议>Nanostructured metal oxides for advanced applications >Controllable Synthesis of Different Bismuth Ferrites by a PVA Modified Hydrothermal Method and Photocatalytic Characterization
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Controllable Synthesis of Different Bismuth Ferrites by a PVA Modified Hydrothermal Method and Photocatalytic Characterization

机译：PVA改性水热法可控制合成不同的铋铁氧体及其光催化特性

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摘要

Bismuth ferrites crystallites were synthesized by a polyvinyl alcohol (PVA) modified hydrothermal method. X-ray diffraction (XRD) analysis indicated that the pure phase of Bi_(25)FeO_(40), BiFeO_3 and Bi_2Fe_4O_9 were synthesized with initial Bi/Fe ratio of 1:1 at the temperature of 200℃ for 24 h, using NaOH concentration of 2, 5 and 10 M, respectively. With addition of PVA, the individual Bi-Fe oxides could be existed in a more wide range of processing parameters. The phase evolution of bismuth ferrites in the process of hydrothermal reactions was discussed. Moreover, photocatalytic properties of the bismuth ferrites crystallites were explored. The results showed that they possessed band gaps of about 2.0 eV and performed good degradation effect at visible light region.
机译：用聚乙烯醇（PVA）改性的水热法合成了铋铁氧体微晶。 X射线衍射（XRD）分析表明，在200℃下，初始Bi / Fe比为1：1的条件下，用NaOH合成Bi_（25）FeO_（40），BiFeO_3和Bi_2Fe_4O_9的纯相。浓度分别为2、5和10M。通过添加PVA，单个Bi-Fe氧化物可以以更广泛的工艺参数存在。讨论了水热反应过程中铋铁氧体的相演化。此外，探索了铋铁氧体微晶的光催化性能。结果表明，它们具有约2.0eV的带隙并且在可见光区域表现出良好的降解效果。

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  • 会议地点 San Francisco CA(US)
  • 作者

    Tong Tong; Dengren Jin; Jinrong Cheng;

  • 作者单位

    School of materials science and engineering, Shanghai University, Shanghai 200072, P.R.China;

    School of materials science and engineering, Shanghai University, Shanghai 200072, P.R.China;

    School of materials science and engineering, Shanghai University, Shanghai 200072, P.R.China;

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