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    • 58. 发明授权
    • Shape control method for nanoparticles for making better and new
catalysts
    • 用于制备更好和新的催化剂的纳米颗粒的形状控制方法
    • US6090858A
    • 2000-07-18
    • US044684
    • 1998-03-18
    • Mostafa A. El-Sayed
    • Mostafa A. El-Sayed
    • B01J13/00B01J35/00C01G55/00C09K3/00B01F17/52B01J23/42
    • B82Y30/00B01J13/0008B01J35/0013C01G55/002C01P2004/04C01P2004/22C01P2004/38C01P2004/40C01P2004/52C01P2004/64
    • A method for shape controlled synthesis of colloidal metal nanoparticles includes providing a solution of 8.times.10.sup.-5 M K.sub.2 PtCl.sub.4 and water in a reaction vessel and maintaining the vessel at a constant temperature of approximately 25.degree. C. 0.1 M sodium polyacrylate is then added to the solution. Thereafter, argon gas is bubbled through the solution for approximately 20 minutes, and then hydrogen gas is bubbled through the solution for approximately 5 minutes to saturate the solution and so that platinum ions in the solution are reduced. The reaction vessel is sealed and the solution is allowed to stand for approximately 12 hours, whereby platinum colloidal nanoparticles possessing a particular shape distribution and size distribution are formed. The shape and size distributions of produced nanoparticles can be manipulated by changing the ratio of the concentration of sodium polyacrylate to platinum ions in a subsequently formed solution while maintaining all other variables constant.
    • 胶体金属纳米颗粒的形状控制合成方法包括在反应容器中提供8×10 -5 M K 2 PdCl 4和水的溶液,并将容器保持在约25℃的恒定温度。然后将0.1M聚丙烯酸钠加入溶液 。 此后,将氩气鼓泡通过溶液约20分钟,然后将氢气鼓泡通过溶液约5分钟以使溶液饱和,使溶液中的铂离子减少。 将反应容器密封并将溶液静置约12小时,由此形成具有特定形状分布和尺寸分布的铂胶体纳米粒子。 可以通过改变随后形成的溶液中聚丙烯酸钠与铂离子的浓度的比例,同时保持所有其它变量恒定,来操纵所制备的纳米颗粒的形状和尺寸分布。