Abstract
Four aluminum and gallium phosphates including AlPO 4-quartz ( 1), GaPO 4-quartz ( 2), AlPO 4-LTA ( 3) and GaPO 4-LTA ( 4) were ionothermally synthesized using [Emim]Br as structure-directing agent (SDA) and solvent. The samples were characterized by scanning electron micrographs (SEM), X-ray single crystal diffraction and X-ray powder diffraction (XRD). Effects of synthesis conditions, such as P 2O 5/Al 2O 3 and HF/Al 2O 3 ratios, as well as P 2O 5/Ga 2O 3 ratio and reaction temperature on the crystallization of aluminum and gallium phosphates were investigated, respectively. It was indicated that the P 2O 5/Al 2O 3 ratio or P 2O 5/Ga 2O 3 ratio played the dominant role in the phase transformation of aluminum phosphates or gallium phosphates.
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