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Non-isothermal decomposition kinetics of synthetic serrabrancaite (MnPO4 · H2O) precursor in N2 atmosphere

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Abstract

The thermal decomposition of synthetic serrabrancaite (MnPO4 · H2O) was studied in N2 atmosphere using TG-DTG-DTA. Thermal analysis results indicate that the decomposition occurs in two stages, which are assigned to the dehydration and the reduction processes and the final product is Mn2P2O7. X-ray powder diffraction, FT-IR and FT-Raman techniques were used for identification of the solid decomposition product. The decomposition kinetics analysis of MnPO4 · H2O was performed under non-isothermal condition through isoconversional methods of Flynn–Wall–Ozawa (FWO) and Kissinger–Akahira–Sunose (KAS). The dependences of activation energies on the extent of conversions are observed in the dehydration and the reduction reactions, which could be concluded the “multi-step” processes.

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Acknowledgments

The authors would like to thank the Chemistry Department, Khon Kaen University for providing research facilities. This work is financially supported by the Thailand Research Fund (TRF) and the Commission on Higher Education (CHE): Research Grant for New Scholar (MRG5280073), Ministry of Science and Technology, Thailand.

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Authors and Affiliations

  1. King Mongkut’s Institute of Technology Ladkrabang, Chumphon Campus, 17/1 M. 6 Pha Thiew District, Chumphon, 86160, Thailand

    Banjong Boonchom

  2. Department of Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand

    Chanaiporn Danvirutai

  3. Department of Chemistry, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Ladkrabang, Bangkok, 10520, Thailand

    Montree Thongkam

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  1. Banjong Boonchom
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  2. Chanaiporn Danvirutai
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Correspondence to Banjong Boonchom.

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Boonchom, B., Danvirutai, C. & Thongkam, M. Non-isothermal decomposition kinetics of synthetic serrabrancaite (MnPO4 · H2O) precursor in N2 atmosphere. J Therm Anal Calorim 99, 357–362 (2010). https://doi.org/10.1007/s10973-009-0096-2

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