( 山东大学 材料科学与工程学院，济南 250061)
摘 要: 以尿素、 硫酸镍为原料， 用均相沉淀法制备了氧化镍纳米线，并通过 X射线衍射(XRD)、 透射电镜(TEM)及红外光谱等测试手段对所得产物的组成和形貌进行了研究。 TEM结果表明， 所得产物为多晶氧化镍纳米线，直径和长度分别为5~15 nm和250~350 nm。 通过对前驱体产物在不同温度下煅烧，发现纳米线在600 °C分解为颗粒。作为比较， 以尿素为沉淀剂， 用水热法制得氧化镍纳米粉体， 结果得到球形和排列整齐的棒状两种形态。
关键字: 氧化镍；纳米线； 均相沉淀法； 水热法
（ School of Materials Science and Engineering,
Shandong University, Ji'nan 250061, China）
Abstract: Nickel oxide nanowires were prepared by urea-based homogeneous precipitation process. The structure, morphology and composition of the as precipitated and heat-treated materials were characterized by means of XRD, TEM, and IR spectra analysis. The result of the electron diffraction shows that the NiO nanowires are polycrystalline with 5-15 nm in diameter. The nanowires were broken into particles when calcined at 600 °C. For comparison, the hydrothermal method was also used to prepare NiO nanopowders. As a result, assembled nanocrystals and comb-like nanobars were obtained.
Key words: nickel oxide; nanowire; homogeneous precipitation method; hydrothermal method
