摘要：采用喷雾燃烧的方法,以HAuCl₄在高温火焰中原位分解生成的Au纳米颗粒为催化剂,以SnCl₄.5H₂O为锡源,简单、快速地制备高度结晶的SnO₂纳米线;利用X射线衍射、透射电镜和选区电子衍射等对制备的纳米线进行表征;研究SnO₂纳米线的晶格间距和晶体的生长方向,提出高温火焰快速反应过程中Au纳米颗粒催化SnO₂纳米线的生长机理。结果表明,制备的SnO₂纳米线为正方晶系的金红石型氧化锡单晶结构,直径为1525 nm,长度在几百纳米到几微米之间。

关键词：喷雾燃烧；纳米线；纳米颗粒

Abstract：Highly crystallized SnO₂ nanowires were prepared by flame spray pyrolysis approach,using SnCl₄.5H₂O as tin source and chloroauric acid to catalyze the growth of SnO₂ nanowires.The as-obtained SnO₂ nanowires were characterized by XRD,TEM and SAED.The lattice distance and growth direction of SnO₂ nanowires were studied and the nucleation growth mechanism of SnO₂ nanowires was proposed.The results show that the tetragonal rutile SnO₂ nanowires possess a diameter from 15 to 20 nm and a length of hundreds to thousands nanometers.

Keywords：flame spray pyrolysis;nanowire;nanoparticle