Hydrothermal Synthesis and Characterization of Core-shell TiO_2/Al_2O_3 Nano Material

Core-shell nanometer TiO2/Al2O3 particles were prepared by one-step hydrothermal method,the effects of pH,temperature and time for hydrothermal process on the performance of the resulting powders were studied.The optimized reaction parameters were on the follows:The precursor's pH about 9.0 hydrothermal temperature of 260℃ holding for 3.5h.The average particle size of the product was also smaller than 20nm.The nanometer TiO2/Al2O3 particles prepared by one-step hydrothermal are well cored though the XRD,TEM and SEM characterization.The preparation also can improve the aging resistance of emulsoid.