Soft solution synthesis, non-isothermal decomposition kinetics and characterization of manganese dihydrogen phosphate dihydrate Mn(H2PO4)2·2H2O and its thermal transformation products

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dc.contributor.authorBoonchom, Banjong
dc.contributor.authorDanvirutai, Chanaiporn
dc.contributor.authorMaensiri, Santi
dc.date.accessioned2026-08-06T09:56:46Z
dc.date.available2026-08-06T09:56:46Z
dc.date.issued2008-06-15
dc.description.abstractManganese dihydrogen phosphate dihydrate (Mn(H<inf>2</inf>PO<inf>4</inf>)<inf>2</inf>·2H<inf>2</inf>O) was synthesized by a simple, rapid and cost-effective method using Mn(c) and H<inf>3</inf>PO<inf>4</inf> in water-acetone medium at ambient temperature. The thermal stability of the Mn(H<inf>2</inf>PO<inf>4</inf>)<inf>2</inf>·2H<inf>2</inf>O was studied by means of the non-isothermal kinetic (Kissinger method). The specificity of thermal decomposition was characterized by identification of the bonds to be selectively activated due to energy absorption at vibrational level, which was assigned by comparison of the calculated wavenumbers with the observed wavenumbers in FTIR spectra. These results were used to identify the molecules or ions that were eliminated in each thermal transition step. The thermal transformation products from the synthesized Mn(H<inf>2</inf>PO<inf>4</inf>)<inf>2</inf>·2H<inf>2</inf>O according to the thermal treatments at 243, 773 and 1073 K were obtained to be Mn(H<inf>2</inf>PO<inf>4</inf>)<inf>2</inf>, Mn<inf>2</inf>P<inf>4</inf>O<inf>12</inf> and Mn<inf>2</inf>P<inf>2</inf>O<inf>7</inf>, respectively. The synthesized Mn(H<inf>2</inf>PO<inf>4</inf>)<inf>2</inf>·2H<inf>2</inf>O and its thermal transformation products were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and FTIR spectroscopy. The SEM micrographs of the obtained products show the different morphologies, which are important for specific applications. © 2007 Elsevier B.V. All rights reserved.
dc.identifier.citationMaterials Chemistry and Physics, 109(2-3), 404-410, 2008
dc.identifier.doi10.1016/j.matchemphys.2007.12.018
dc.identifier.issn02540584
dc.identifier.other2-s2.0-41449110372
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/2044
dc.sourceMaterials Chemistry and Physics
dc.subjectManganese cyclotetrametaphosphate
dc.subjectManganese dihydrogen phosphate dihydrate
dc.subjectManganese pyrophosphate
dc.subjectNon-isothermal kinetics
dc.subjectThermal analysis
dc.titleSoft solution synthesis, non-isothermal decomposition kinetics and characterization of manganese dihydrogen phosphate dihydrate Mn(H2PO4)2·2H2O and its thermal transformation products
dc.typeArticle

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