氧化铋亚微米棒在水热条件下的可控生长研究(英文)

Controllable Growth of Monoclinic α-Bi_2O_3 Submicrorods by Hydrothermal Synthesis Method

用水热法制备了单斜结构的氧化铋亚微米棒,而且通过控制硝酸铋的浓度和水热反应时间,能有效地控制氧化铋亚微米棒的直径和长径比。氧化铋亚微米棒的晶体结构、尺寸和形状用 X-射线衍射、扫描电子显微镜和透射电子显微镜进行了表征。研究发现:随着硝酸铋浓度的降低,氧化铋粒子的尺寸逐渐减小;随着反应时间的增加,氧化铋亚微米棒的直径和长度逐渐增加。此外,还讨论了氧化铋亚微米棒的形成机理。

Monoclinic α-Bi2O3 submicrorods were synthesized by a hydrothermal route. Their diameters and lengths could be effectively controlled through varying Bi(NO3)3 concentration and reaction time. The crystalline structure, size, and shape of the Bi2O3 particles were investigated by XRD, SEM, and TEM. The sizes of the Bi2O3 rods are gradually decreased with decreasing Bi(NO3)3 concentrations while the diameters and lengths of the Bi2O3 submicrorods gradually are increased with increasing reaction time. In addition, the formation mechanism of the Bi2O3 submicrorods was also discussed.