Synthesis, characterization and non-isothermal decomposition kinetics of manganese hypophosphite monohydrate

被引：65

作者：

Noisong, Pittayagom ^{[1
]}

Danvirutai, Chanaiporn ^{[1
]}

Srithanratana, Tipaporn ^{[1
]}

Boonchom, Banjong ^{[2
]}

机构：

[1] Khon Kaen Univ, Fac Sci, Dept Chem, Khon Kaen 40002, Thailand

[2] King Mongkuts Inst Technol, Chumphon 86160, Thailand

来源：

SOLID STATE SCIENCES | 2008年 / 10卷 / 11期

关键词：

alpha-Manganese hypophosphite monohydrate; Non-isothermal kinetics; Thermal transformation;

D O I：

10.1016/j.solidstatesciences.2008.02.020

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The manganese hypophosphite monohydrate (alpha-Mn(H2PO2)(2)center dot H2O) was synthesized and characterized by differential thermal analysis-thermogravimetry (TG/DTG/DTA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The thermal transformation products form the synthesized Mn(H2PO2)(2)center dot H2O according to the thermal treatment at 160 and 450 degrees C were found to be alpha-Mn(H2PO2)(2)center dot xH(2)O and Mn2P2O7, respectively. The activation energies of two decomposition reaction steps of Mn(H2PO2)(2)center dot H2O were calculated through the isoconversional methods of Ozawa and KAS. The obtained activation energies can be concluded that the reactions of the dehydration and the decomposition steps for Mn(H2PO2)(2)center dot H2O were the single and multi-step mechanisms, respectively. (c) 2008 Elsevier Masson SAS. All fights reserved.

引用

页码：1598 / 1604

页数：7

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