Journal of Petrochemical Universities

›› 2017, Vol. 30 ›› Issue (1): 14-17.DOI: 10.3969/j.issn.1006-396X.2017.01.003

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Rietveld Refinement Phase Characterization of ZnO/CeO2 Nanocomposites

  

  • Received:2016-06-21 Revised:2017-07-06 Published:2017-02-24 Online:2017-02-28

ZnO/CeO2 复合纳米材料的Rietveld 全谱拟合物相表征

吴 限1,徐维泽1,张宇佳2,马 诚1,李丽华1,张金生1   

  1. 1.辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001;2.煤科集团沈阳研究院有限公司,辽宁抚顺113122
  • 作者简介:吴限(1985-),男,博士,讲师,从事纳米材料合成与XRD分析方向研究;E-mail:wuxianlnpu@163.com。
  • 基金资助:
    辽宁省教育厅科学技术研究一般项目(L2016019)。

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Abstract:

ZnO/CeO2 nanocomposites were prepared by heterogeneous precipitation method. The phase composition was determined by XRD method, and analyzed by Rietveld refinement method. The refinement results show that the sample is made up of a mixture of hexagonal ZnO and cubic CeO2. The average crystallite sizes are 20.0 nm and 6.9 nm, and the mass fractions are 28.2% and 71.8%, respectively. The reliability factors of the refinements are Rwp=5.95%, Rexp=4.06%, GOF=1.47. The reliability of results is further proved by TEM analysis. It is showed that Rietveld analysis is scientific and reliable in the study of phase ratio and grain size of nanocomposites.

Key words: ZnO/CeO2, Rietveld refinement method, Grain size;Quantitative phase analysis

摘要： 通过非均相沉淀法合成ZnO/CeO2 复合纳米材料,并利用XRD 粉末衍射法对其进行物相分析、Rietveld全谱拟合法对其进行结构精修。拟合结果表明,该法制备样品为六方相ZnO 与立方相CeO2 混合相,平均晶粒尺寸分别为20.0nm 和6.9nm,质量分数分别为28.2%及71.8%。精修结果的数值判据为Rwp=5.95%、Rexp=4.06%、GOF=1.47,数值均在正常范围且计算结果可靠。TEM 表征进一步证明计算结果可靠。研究结果表明,Rietveld全谱拟合法在研究复合纳米材料的物相比与晶粒大小时更加合理。

关键词: ZnO/CeO2, Rietveld全谱拟合法, 晶粒大小, 定量相分析

Cite this article

WuXian,XuWeize,ZhangYujia,MaCheng,LiLihua. Rietveld Refinement Phase Characterization of ZnO/CeO2 Nanocomposites[J]. , 2017, 30(1): 14-17.

吴 限,徐维泽,张宇佳,马 诚,李丽华,张金生. ZnO/CeO2 复合纳米材料的Rietveld 全谱拟合物相表征[J]. 石油化工高等学校学报, 2017, 30(1): 14-17.

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