【Abstract】 The preparation of nano-TiO₂ powder by the alcohol-thermal method at atmospheric pressure using ethanol as the solvent,H₂TiO₃ as the precursor,and KOH,NaOH or NH₃·H₂O as the mineralizer has been presented.XRD result showed that the structure of TiO₂ is anatase,and with the increase of mineralizer alkalinity,the average diameter of TiO₂ becomes smaller,and the crystallinity of TiO₂ becomes higher.The diameter and the crystallinity of TiO₂ affect the catalytic activity of TiO₂ for the synthesis of dibutyl carbonate（DBC） from dimethyl carbonate（DMC） and butyl alcohol.The anatase TiO₂ obtained from KOH exhibits high catalytic activity,giving 61.9% conversion of DMC,100% selectivity for DBC,and 61.9% yield of DBC.The conversion of DMC,selectivity and yield of DBC remain almost unchanged through four reuses.更多还原