Syntheses, Characterizations and Catalytic Activities of Rare Earth Derivatives of Molybdotungstovanado-Phosphoric Heteropoly Acid
来源期刊：JOURNAL OF RARE EARTHS2002年第6期
论文作者：韦永德 单永奎 周百斌 马慧媛 王玉和
Key words：rare earths; molybdotungstovanadophosphoric heteropoly complexes; Keggin structure; actalytic cativity;
Abstract: Seven new-type pentabasic heteropoly complexes with the general molecular formula K10H5[Ln(PMo5W4V2O39)2]*nH2O(Ln=La, Ce, Pr, Nd, Eu, Gd, Dy) were synthesized. The results of IR, UV, 31P, 51V NMR and X-ray powder diffraction pattern demonstrate that the product still maintains Keggin structure. The thermal stability studied by water solubility test, TG-DTA, XRD and IR at various temperature shows that the range of pyrolysis temperature is from 500～550 ℃. The catalytic action varies according to the contents of rare earths which are used to catalyze the decomposition of hydrogen peroxide.
韦永德1，单永奎2，周百斌1，马慧媛3，王玉和3
(1.Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China;
2.Department of Chemistry, East China Normal University, Shanghai 200237, China;
3.Department of Chemistry, Harbin Normal University, Harbin 150080, China)
Abstract:Seven new-type pentabasic heteropoly complexes with the general molecular formula K10H5[Ln(PMo5W4V2O39)2]*nH2O(Ln=La, Ce, Pr, Nd, Eu, Gd, Dy) were synthesized. The results of IR, UV, 31P, 51V NMR and X-ray powder diffraction pattern demonstrate that the product still maintains Keggin structure. The thermal stability studied by water solubility test, TG-DTA, XRD and IR at various temperature shows that the range of pyrolysis temperature is from 500～550 ℃. The catalytic action varies according to the contents of rare earths which are used to catalyze the decomposition of hydrogen peroxide.
Key words:rare earths; molybdotungstovanadophosphoric heteropoly complexes; Keggin structure; actalytic cativity;
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