Hydrothermal Preparation And Study On Tio2,sno2 Nanocrystal

In this work, the anatase TiO₂ nanorods, the large-scale micronsized SnO₂ crystals and Sn doped TiO₂ nanomaterials were synthesized by the hydrothermal method.The pure rutile TiO₂ nanorods are prepared using TiCl3 as the predecessor at 180℃for 24h, and the nanocrystals are still rutile through the addition NaCl solution as the mineralizer, but the TiO₂ nanomaterials turn into pure anatase while the concentration of KF solution is higher than 0.2mol/L as the mineralizer.The anatase TiO₂ nanocrystals are synthesized at 150℃for 24h with the TiCl3 and titanate sodium nanotubes as the predecessor at the filling factor of 68%, the morphology of crystal is bulk; When the titanate sodium nanotubes sintered at 400℃as precursor are added, the anatase TiO₂ nanorods are synthesized with the diameter of 10 nm, the length ranged from 30nm to 100nm, and the length-radins proportion of 5:1.The ZnSnO3 is prepared at 180℃for 12h with SnCl4·5H2O as the precursor, and KOH as the mineralizer, when the ZnO is added. Then the SnO₂ crystals with the diameter of 150-200nm and the length of 3μm-5μm are synthesized at 430℃for 24h based on the solute condition of the decomposition of the ZnSnO3 under high temperature.The Sn doped rutile TiO₂ nanocrystals are synthesized based on the hydrothermal reaction with the TiCl3 and SnCl4·5H2O as the precursor, which the crystals with the length of 80nm to 200nm. The Sn content of the crystal is low and the most doped content of Sn is 2.81at% by the measurement of the EDS equipment. The result shows that the Sn was limited solid solubilities in TiO₂ crystal.