水热条件对锗酸铜纳米线花形成的影响

Effect of Hydrothermal Conditions on the Formation of CuGeO_3 Nanowire Flowers

分析了水热温度、保温时间对锗酸铜纳米线花形成的影响。结果表明水热温度对锗酸铜纳米线花的形成有着重要作用。保温时间为1 h时,随着水热温度降低至200℃,纳米线的直径增加,样品中的单斜锗酸铜晶相消失,由纯斜方结构的锗酸铜晶相构成。250℃时,随着保温时间增加,锗酸铜纳米线花中的纳米线直径、长度均有所增加,保温时间增至6 h后,样品为自由分布的锗酸铜纳米线。

The effect of hydrothermal temperature and time on the formation of the CuGeO3 nanowire flowers has been analyzed.The results reveal that the hydrothermal temperature plays an essential role in the formation of the CuGeO3 nanowire flowers.The diameter of CuGeO3 nanowires increases with the decrease of the hydrothermal temperature when the growth time is 1 h;the monoclinic CuGeO3 phase disappears and the CuGeO3 nanowire flowers are composed of pure orthorhombic CuGeO3 phase.Both the diameter and length of CuGeO3 nanowires increase with the increase of the growth time,and the sample is composed of free-standing CuGeO3 nanowires when the growth time is increased to 6 h at 250 ℃.