摘要：以硝酸锌为锌源,采用水热法合成由纳米晶粒聚集成的ZnO纳米微球,通过调节三乙醇胺与水的体积比得到不同粒径的ZnO微球,采用X射线衍射分析、红外光谱、扫描电镜和紫外-可见光谱表征样品。结果表明,制备的ZnO样品为六方纤锌矿结构;ZnO纳米微球生长机理是硝酸锌在三乙醇胺水溶液中水解生成ZnO纳米晶粒并定向聚集。

关键词：ZnO纳米微球；水热法；光吸收；生长机理

Abstract： Taking zinc nitrate hexahydrate as zinc sources， ZnO nano-spheres constituted by the oriented aggregation of nano-particles were synthesized by hydrothermal method. ZnO spheres with various diameters were obtained by regulating volume ratios of triethanolamine to H₂O. The structure and morphology of the obtained samples were characterized by XRD， IR， SEM and UV -Vis. The results show that the samples are hexagonal wurtzite ZnO. The possible growth mechanism of the nano-spheres is that ZnO nano-crystalline particles are synthesized from zinc nitrate hydrolyzed in triethanolamine solution and then directionally aggregated. 

Keywords： ZnO nano-sphere； hydrothermal method； optical absorption； growth mechanism