Abstract: Hollow α-PbF_2 nanospheres were synthesized through a direct reaction of Pb(NO_3)_2 and HF under solvoththermal microemulsion system consisting of water, hexadecyltrimethyl ammonium bromide(CTAB), cyclohexane and 1-pentanol. Transmission electron microscopy (TEM) was utilized to characterize the morphology of α-PbF_2 as-prepared. Several key variables were investigated to reveal the formation and mechanism as well as the shape and size changing of α-PbF_2 under different conditions. The results showed that the system of protection of surfactant CTAB and generation of nitric acid corrosion is the formation of hollow α-PbF_2 the main reason; Addition, α-PbF_2 hollow nanospheres size and wall thickness by changing the water and the molar ratio of surfactant to control.

Key words: Hollow α-PbF_2 nanospheres were synthesized through a direct reaction of Pb(NO_3)_2 and HF under solvoththermal microemulsion system consisting of water, hexadecyltrimethyl ammonium bromide(CTAB), cyclohexane and 1-pentanol. Transmission electron microscopy (TEM) was utilized to characterize the morphology of α-PbF_2 as-prepared. Several key variables were investigated to reveal the formation and mechanism as well as the shape and size changing of α-PbF_2 under different conditions. The results showed that the system of protection of surfactant CTAB and generation of nitric acid corrosion is the formation of hollow α-PbF_2 the main reason; Addition, α-PbF_2 hollow nanospheres size and wall thickness by changing the water and the molar ratio of surfactant to control.