A New Synthesis of BaHPO₄ Precipitated by BaCO₃-H₃PO₄-NaOH System at Room Temperature

Abstract:

Barium hydrogenphosphate, BaHPO₄ was synthesized for the first time through simple and rapid method using BaCO₃-H₃PO₄-NaOH, pH =9.0 at room temperature for 30 min. The studied BaHPO₄ decomposed in a single well-defined stage via deprotonated hydrogenphosphate reactions, revealed by TG/DTG and DSC techniques. The calculated wavenumbers based on DSC peak were comparable with FTIR results, which support the breaking bonds of P-OH (HPO₄^2-) in the deprotonated hydrogenphosphate reactions. The thermodynamic functions (ΔH*, ΔG*, and ΔS*) for the deprotonated hydrogenphosphate reactions calculated from DSC data indicate that the deprotonated HPO₄^2- reaction occur a lower-energy pathway and spontaneous process. The FTIR, XRD and SEM data of the studied BaHPO₄ and its decomposed product Ba₂P₂O₇ are also reported.

• Periodical: Advanced Materials Research (Volume 717)
• Pages: 37-43
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.717.37
• Online since: July 2013
• Authors: Ban Jong Boonchom, Chesta Ruttanapun, Montree Thongkam, Pachernchaipat Chaiyasith, Somsak Woramongkonchai, Samart Kongteweelert, Naratip Vittayakorn
• Keywords: Characterization Inorganic Phosphate Compounds, New Synthesis, Non-Uniform, Porous Structure, Thermodynamic Properties

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