Influence of the nature of precipitating basic agent on the synthesis of catalytic magnesium phosphate materials

During the preparation, the nature of the precipitating agent strongly influences the synthesis of magnesium phosphate. Ortho and pyrophosphate can be obtained with the use of NaOH and NH4OH, respectively. The solids obtained were investigated as synthesized or after calcination by various physico-chemical techniques such as X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential thermal analysis (DTA). The compounds calcined at 773 K have been further characterized by 31P MAS-NMR spectroscopy.

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