Preparation of TiO_2 Nanopowders by Non-hydrolytic Sol-Gel and Solvothermal Synthesis

摘要

TiO_2 nanopowders were synthesized by non-hydrolytic sol-gel synthesis and solvothermal method. Effects of the type of alcohol on the properties of TiO_2 nanopowders were investigated. XRD and FSEM were used to characterize TiO_2 nanopowders. The results showed that TiO_2 nanopowders with diameters of about 50nm and micro-spheres with diameters of about 400～500nm were obtained by non-hydrolytic sol-gel synthesis, when ethanol and isopropanol were used as oxygen donor and solvent, respectively. TiO_2 prepared with ethanol by non-hydrolytic sol-gel synthesis and calcined at 700°C consisted only 3.8% rutile phase. After solvothermal synthesis, TiO_2 nanopowders with diameters of about 50nm were obtained when ethanol and isopropanol were used as the oxygen donor. However, submicrometer spheres with uniform size distribution were obtained with 1-octanol.