Nanocrystals of CeVO4 Doped by Metallic Heteroions

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• 作者：Yeqian Shen ; Yucheng Huang ; Sujuan Zheng ; Xuefeng Guo ; Zhao-Xu Chen ; Luming Peng ; Weiping Ding
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：July 4, 2011
• 年：2011
• 卷：50
• 期：13
• 页码：6189-6194
• 全文大小：850K
• 年卷期：v.50,no.13(July 4, 2011)
• ISSN：1520-510X

文摘

CeVO₄ nanocrystals doped by heteroions were prepared via a hydrothermal method without the presence of surfactants or templates. Transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), solid state ⁵¹V NMR, and inductively coupled plasma (ICP) were used to characterize the morphology, structure, and compositions of the materials. X-ray photoelectron spectroscopy (XPS) results confirmed that there is a valence change from Ce³⁺ to Ce⁴⁺ for a fraction of cerium atoms whereas the vanadium atoms remain in the pentavalent state V⁵⁺ upon the substitution of Ca²⁺ into CeVO₄. Raman spectroscopy was used to monitor the effects of the doping ion on the CeVO₄ lattice contraction and distortion. The appearance of the shifted and broadened Raman peaks for the doped CeVO₄ was interpreted by theoretical calculations performed with Vienna ab initio simulation package. The redox properties and photocatalytic activities of the obtained nanocrystals were also investigated and discussed in detail.