Syntheses and properties of microporous materials of nickel phosphates

In hydrothermal synthetic conditions, we synthesized three kinds of microporous materials of nickel phosphates, and conformed their compositions by ICP-AES, EDX, and C H N element analyses. They were characterized by IR, XRD, SEM, and TG-DTA/TG-DSC. The XRD patterns demonstrated that the material structures are open-frameworks. The IR spectra of the compounds show the presence of vibrational bands characteristic of ethylenediamine at 1400-1700cm^-1, and the intense bands at 800-1200cm^-1 are associated with the stretching vibrations of phosphate groups. Bands at 400-650cm^-1 were attributed to bending vibrations of phosphate groups.