气-固反应法制备纳米结构及其生长机制  

Preparation and Growth Mechanism of Nano-structure by Gas-Solid Reaction

作　　者：陈星建[1] 丁浩冉[1] 徐波[1] 王树林[2] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海理工大学材料科学与工程学院,上海200093

出　　处：《中国粉体技术》2010年第2期8-11,共4页China Powder Science and Technology

基　　金：国家自然科学基金项目;编号:50575147;上海市教委重点资助项目;编号:J50503

摘　　要：利用滚压振动磨在干法室温条件下,将金属锌制备成为尺度大约在3～5nm的锌量子点,并将纳米锌量子点加热到250℃并与水蒸气进行反应,得到纳米氧化锌与纳米锌的混合物。分别利用能量发射谱仪(EDS)、X射线多晶体衍射仪(XRD)、透射电镜(TEM)测试样品的化学成分和表面形貌。结果表明:锌粉加热到250℃与水蒸气反应得到的产物具有良好的分散性,其特征是棒状和片状结构共存,纳米棒有明显的沿着[0,1,-1,1]晶向的生长趋势。一维ZnO纳米棒材料对应于初始锌纳米晶颗粒,与其他方法中ZnO的生长机制不同,可以认为本文中的ZnO的生长遵从顶端生长机制。The miler vibration mill was used to manufacture zinc quantum dots of 3-5 nm in dry mode and at room temperature, then the zinc quantum dots were hydrolyzed with steam under different temperature to obtain hybrid of ZnO and Zn nano-structures. The as-synthesized particles were characterized by XRD, TEM. The results showed that the nano-structure synthesized under 250 ℃ had the highest dispersivity featuring nano-flakes with nano-rods, that grew along the [0,1,-1,1] direction. The ZnO nano-rod grew related with nano-crystalline Zn, and top-up model was proposed for interpreting the nano-rod growth mechanism.

关 键 词：气-固反应 纳米结构 水解反应 生长机制 

分 类 号：TB383[一般工业技术—材料科学与工程]