摘要
以金属锌为原料,研究了真空条件下纳米四针状氧化锌晶须(T-ZnOw)的制备,考察了反应条件对氧化锌结晶形貌的影响。表面能谱证实产物只含锌和氧原子,但氧原子数少于化学计量,表明T-ZnOw在缺氧环境中生长。XRD物相分析表明:产物为纯的六方晶系纤锌矿结构;SEM研究表明:分子筛用量、反应温度、体系压力对产物的形态影响很大。
Nano-tetrapod zinc oxide whiskers are prepared by vapor-phase oxidation of zinc pig under high temperature. The effects of content of molecular sieve, reaction temperature and system pressure on the morphology of T-ZnO, are examined. The products are identified to be pure ZnO with wurtzite structure by X-ray diffraction analysis (XRD). But EDS analysis shows that the atom ratio of oxygen and zinc is below 1. The scanning electron microscopy (SEM) investigation indicates that content of molecular sieve, reaction temperature and system pressure have great effects on the morphology of T-ZnOw. Under constant pressure, the morphology of the whiskers changes with the increasing of reaction temperature. Nano T-ZnO, with complete and uniform structure can be obtained when the pressure and temperature are 11083Pa and 1038℃ respectively. While underconstant temperature, the dimension of the products reduces with the reducing of the pressure. Uniform nano T-ZnO. with root dimension of 20nm to 80nm and length of 300nm to 2μm could be obtained when the pressure is lower than 11083Pa.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2005年第F11期89-91,共3页
Materials Reports