常温直接沉淀法制备ZnO纳米棒

Synthesis of ZnO Nanorods by a Direct Precipitation Method at Room Temperature

在常温下，以PEG-400（聚乙二醇400）为表面活性剂，采用直接沉淀法合成了ZnO纳米棒．产物用XRD，TEM，SAED和HRTEM等进行了表征．结果表明，所得ZnO为一维的纳米棒，属于六方纤维矿的单晶结构．ZnO纳米棒的直径在20～40nm之间，长度在300～800nm范围．（0001）面为ZnO纳米棒的生长方向．讨论了ZnO相的生成和ZnO纳米棒的形成机理以及PEG-400在其形成过程中的作用．

Zinc oxide （ZnO） nanorods were successfully synthesized by a simple approach v/a a direct precipitation method in the presence of PEG-400 （polyethylene glycol 400） at room temperature. The characterizations of ZnO nanorods were carried out by XRD, TEM, SAED and HRTEM. The results show that the as-prepared ZnO crystals are one-dimensional nanorsds which are single crystals with a hexagonal wurtzite structure. The ZnO nanorods are uniform with 20-40 nm diameter and lengths ranging from 300 to 800 nm. The （0001） face is the growth direction of the ZnO nanorods. The possible mechanism of the growth of ZnO crystal and the form of ZnO nanorods along with the important effect of PEG400 on the fabrication of ZnO nanorods were discussed.