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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >CeO2-Bi2O3 nanocomposite: Two step synthesis, microstructure and photocatalytic activity
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CeO2-Bi2O3 nanocomposite: Two step synthesis, microstructure and photocatalytic activity

机译：CeO2-Bi2O3纳米复合材料：两步合成，微观结构和光催化活性

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摘要

CeO2-Bi2O3 composite was synthesized via a two-stage process. The precursors were prepared from Ce(NO3)(3)center dot 6H(2)O, Bi(NO3)(3)center dot 5H(2)O and CO(NH2)(2) with different molar ratio through the hydrothermal process, and then was completed by carrying out the precursors for 4 h at 600 degrees C under flowing air atmosphere. Techniques of X-ray diffraction (XRD), transmission electron microscopic (TEM) and diffuse reflectance ultraviolet-vis spectra (UV-DRS) were employed to characterize the as-synthesized materials. The results showed that the microstructure and morphology of CeO2-Bi2O3 composite were similar in spite of different inverse proportion. We also investigated improved photocatalytic activity in the case of CeO2-Bi2O3 composite catalyst compared to the catalytic activity of pure Bi2O3 or CeO2 powder. The suppression of charge recombination in the composite CeO2-Bi2O3 catalyst led to higher catalytic activity for the degradation of RhB. The CeO2 10%/Bi2O3 photocatalyst exhibited maximum photocatalytic activity. The photocatalytic activity is in close relation with the inverse proportion between reactants.
机译：CeO2-Bi2O3复合材料是通过两步法合成的。通过水热法由摩尔比不同的Ce（NO3）（3）中心点6H（2）O，Bi（NO3）（3）中心点5H（2）O和CO（NH2）（2）制备前驱体，然后通过在流动空气气氛下在600℃下将前体进行4小时来完成。利用X射线衍射（XRD），透射电子显微镜（TEM）和漫反射紫外可见光谱（UV-DRS）等技术表征了合成后的材料。结果表明，尽管反比例不同，但CeO2-Bi2O3复合材料的微观结构和形貌相似。与纯Bi2O3或CeO2粉末的催化活性相比，我们还研究了CeO2-Bi2O3复合催化剂的改进的光催化活性。复合CeO2-Bi2O3催化剂中电荷复合的抑制导致RhB降解的催化活性更高。 CeO2 10％/ Bi2O3光催化剂表现出最大的光催化活性。光催化活性与反应物之间的反比例密切相关。

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