Thermal Decomposition Behavior of Metal-oxygen Clusters with Keggin Structure

Abstract

Abstract: In this paper,the thermal decomposition behavior of the polyoxometalates with a Keggin structure(Y_mH_nXM₁₂O₄₀)(X=P,Si,Ge;M=W,Mo,Y=NH^⁺₄,K^⁺,Cu^{^2⁺}) was investigated systematically by using Xray diffraction and IR spectra at different temperatures,TG-DTA and solubility experiment methods.Their precisely decomposed temperatures were obtained,and the procedure of decomposition was also explored.The determinant criterions of the thermal decomposition and the factors affecting the thermal property of the polyoxometalates were discussed and some new views were presented.At the same time,the main decomposition products of the prepared polyoxometalates were identified by XRD.

Key words: Keggin structure, Polyoxometalate, Thermally Decomposed temperature, Thermal decomposition behavior

CLC Number:

O614

TrendMD:

KONG Ai-Guo, ZHANG Su-Mei, ZHANG Da-Wei, LV Li-Li, JIN Chao, SHAN Yong-Kui. Thermal Decomposition Behavior of Metal-oxygen Clusters with Keggin Structure[J]. Chem. J. Chinese Universities, 2005, 26(11): 2002.

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Thermal Decomposition Behavior of Metal-oxygen Clusters with Keggin Structure

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