Synthesis And Characterization Of Strontium Salts Nanostructures

The preparation and shaped control of nanomaterials becomes a hot field in materials science. With the size decrease of materials, many new and peculiar properties appeared compared with block ones. Strontium salts have a wide application in chemical industry as well as in bio-engineering and health-keeping. The element of strontium can soften the heart and blood vessels, help to the formation of bone in body, regulates metabolic balance et al. It is proved that strontium salts could resist the losing of bone and enhance the formation of bone.In this paper, the preparation and characterization of strontium salts include strontium chromate; strontium carbonate; strontium stannate as well as Tb3+ doped strontium hydrogen phosphate were studied. The formation mechanism and affect factors are also investigated.Strontium chromate nanobelts and nanotubes are synthesized via solution method at room temperature. The changes of temperature and surfactant were studied. The results show that higher temperature is not beneficial to forming nanomaterials, and CTAB plays an important role in the process. The formation of nanotubes is that: CTAB stick to strontium chromate grains and form a groove shaped structure with the presence of van der waals force. Two or more grooved structures assemble a tube.Strontium carbonate was obtained by the method of urea homogeneous precipitation. With the shape of fiber, strontium carbonate has a high dispersity. XRD and TEM results show as-obtained sample has a single crystal structure. The optical property was also studied. It is found that CTAB and reaction temperature have important effect on the morphology of strontium carbonate. The formation mechanism of strontium carbonate nanostructure is also investigated.SrSn(OH)6 precursors were synthesized by hydrothermal method. To get the SrSnO3 products, the hydrothermally synthesized precursors were first dried in air and then directly annealed in a furnace at 1100℃for 6 h in air. The formation process is that: when Sr(NO)3 and sodium stannate were mixed, SrSn(OH)6 small particles formed. When the product was put in teflon-lined stainless steel autoclave, under hydrothermal conditions, with increasing temperature and pressure, these particles underwent a crystallization process, namely, amorphous precursor particles dissolved and the newly grown SrSn(OH)6 nuclei formed. Later the bigger particles grew at the cost of the small ones according to the Gibbs-Thomson law. And the bigger rod-shaped particles appeared and tended to grow radically from the center. Finally, nearly dumbbell-like particles made of many rods formed after a long time hydrothermal process. SrSn(OH)6 was converted to SrSnO3 during a subsequent calcinations treatment process as a gradual elimination of water.Strontium hydrogen phosphate with a petal shape was synthesized by hydrothermal method. It was assembled by many short rods in nano scale according to the SEM images. Tb3+ doped Strontium hydrogen phosphate shows a particular favorable PL property. This would make Strontium hydrogen phosphate a bright future in medical field.