Effects of Rare Earth Dopants on Crystal Structures of Bismuth Molybdate Catalysts

Ying Zhi Cheng; Li Xue; Xiu Yu Sun; Zhong Bo Hu

doi:10.4028/www.scientific.net/AMR.295-297.1046

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 295-297Effects of Rare Earth Dopants on Crystal...

Effects of Rare Earth Dopants on Crystal Structures of Bismuth Molybdate Catalysts

Abstract:

Crystal structures of Bi₂Mo₃O₁₂ and Bi_1.8Ln_0.2Mo₃O₁₂ (Ln = Ce, Nd, Dy, Er) were studied using Rietveld structural refinements of X-ray powder diffraction data. Substitution of 10 mol% Ln for Bi produced changes in lattice parameters, bond lengths and distances between metal ions. These changes such as decreases in average bond lengths of Mo1O4 tetrahedra and variations in the distances between adjacent metal ions on the same plane could be ascribed to different ionic radii and electronegativty of Bi and rare earth atoms, and might be related to catalytic activity of bismuth molybdate for the selective oxidation and ammoxidation of alkenes.

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Advanced Materials Research (Volumes 295-297)

Pages:

1046-1049

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.295-297.1046

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Online since:

July 2011

Authors:

Ying Zhi Cheng, Li Xue, Xiu Yu Sun, Zhong Bo Hu

Keywords:

Bismuth Molybdate, Crystal Structure, Rare Earth (RE), X-Ray Powder Diffraction

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