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首页> 外文期刊>RSC Advances >The formation mechanism of a Er3+-doped heterojunction ms/tz-BiVO4 with enhanced photocatalytic performance under visible light
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The formation mechanism of a Er3+-doped heterojunction ms/tz-BiVO4 with enhanced photocatalytic performance under visible light

机译：AR3 +掺杂异质结MS / TZ-BIVO4的形成机制，可见光下的光催化性能提高

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BiVO _(4) products doped with different proportions of erbium were prepared by a hydrothermal reaction with varied reaction time. X-ray diffraction reveals the phase transformation from the tetragonal zircon BiVO _(4) to the monoclinic scheelite phases with increasing reaction time even without Er ~(3+) doping. Scanning electron microscopy shows that the morphology of the samples transforms from an irregular structure to rod-like shapes accompanied with the crystalline phase transformation. UV-vis diffuse reflectance spectra and transmission electron microscope indicate that a core–shell structure may form in the meantime. Photocatalytic performance tests have been performed and the mechanism of the improved photocatalytic performance is discussed. In the end, the formation mechanism of the core–shell structure samples and effect of the Er ~(3+) in the crystalline phase transformation are further discussed.
机译：通过与各种反应时间的水热反应制备掺杂不同比例的铒的Bivo _（4）产品。 X射线衍射揭示了从四边形锆石体比_（4）到单斜斜肌晶胞的相变，即使没有ER〜（3+）掺杂，即使在没有ER〜（3+）掺杂也会增加反应时间。扫描电子显微镜表明，样品的形态从不规则结构转换为伴随结晶相变的棒状形状。 UV-VI扩散反射光谱和透射电子显微镜表明核心壳结构可以在此期间形成。已经进行了光催化性能测试，讨论了改善的光催化性能的机制。最后，进一步讨论了核 - 壳结构样品的形成机制和ER〜（3+）在结晶相变化中的效果。

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