通过溶剂热方法,采用水/环己烷/正戊醇/CTAB微乳体系,制备了α-PbF_2中空纳米球.并利用XRD和TEM对产物进行了表征.考察并探讨了体系中几种因素对其尺寸及形貌的影响以及在微乳液中的生长机制.结果表明:体系中表面活性剂CTAB的保护和生成硝酸的腐蚀是形成中空α-PbF_2的主要原因;另外,α-PbF_2中空纳米球的尺寸和壁厚可通过改变水与表面活性剂的摩尔比进行调控.
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.
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