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以锌粒为原料,分子筛为催化剂,利用真空控氧高温气相氧化法,制备了纳米四针状氧化锌晶须(T-ZnOW)。利用XRD和SEM、TEM对产物进行物相分析和形貌观察。结果表明:产物为纯六方晶系纤锌矿结构氧化锌;体系压力和反应温度是影响晶须形貌的两个重要因素。当温度恒定为1038℃,而压力低于11083Pa时,均可获得根部直径为20~80nm、针长500nm~2μm、形貌规整的纳米T-ZnOW。TEM研究表明,纳米T-ZnOW的针部为单晶,而核心为多重孪晶结构,其生长遵循气固生长机理。
Zinc particles as raw materials, molecular sieve as catalyst, the use of vacuum oxygen controlled high-temperature gas phase oxidation method, the preparation of the nano-needle nanostructured zinc oxide whiskers (T-ZnOW). The phase and morphology of the product were characterized by XRD, SEM and TEM. The results show that the product is pure hexagonal wurtzite structure zinc oxide; the system pressure and the reaction temperature are two important factors that affect the whisker morphology. When the temperature is constant at 1038 ℃ and the pressure is lower than 11083Pa, nano-T-ZnOW with root diameter of 20-80nm and needle length of 500-2μm can be obtained. TEM studies show that the nano-T-ZnOW needle as a single crystal, and the core of multiple twin structure, its growth follows the gas-solid growth mechanism.