Seven new-type pentabasic heteropoly complexes with the general molecular formula K 10H 5[Ln(PMo 5W 4V 2O 39) 2]·nH 2O(Ln=La, Ce, Pr, Nd, Eu, Gd, Dy) were synthesized. The results of IR, UV, 31P...Seven new-type pentabasic heteropoly complexes with the general molecular formula K 10H 5[Ln(PMo 5W 4V 2O 39) 2]·nH 2O(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.展开更多
文摘Seven new-type pentabasic heteropoly complexes with the general molecular formula K 10H 5[Ln(PMo 5W 4V 2O 39) 2]·nH 2O(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.
