种子辅助化学法合成ZnO纳米棒及其表征

Preparation of ZnO Nanorods at Low Temperature by Seed-Assisted Chemical Reaction Method

低温条件下(95℃),采用ZnO种子辅助化学反应法,成功制备了宏量直、细的ZnO纳米棒;用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)等分析手段对纳米棒的结构和形貌进行了表征;同时还对ZnO纳米棒的形成机理作了分析;并以ZnO纳米棒作为光催化剂,对甲基橙(MO)溶液进行了光催化实验。结果表明,ZnO与Zn源的摩尔比对ZnO纳米棒的形貌影响很大,PVA通过空间位阻效应控制ZnO纳米棒的长度,ZnO纳米棒有较好的光催化活性。

Hectogram-scale synthesizing straight and thin ZnO nanorods were synthesized by seed-assisted chemical reaction process at low temperature（95 ℃）.The ZnO nanorods were characterized by X-ray diffraction（XRD）,scanning electron microscope（SEM）,transmission electron microscope（TEM）.Furthermore,mechanism was discussed.Experiments were carried out using methyl orange as the pollutant object to evaluate the photocatalytic activity of ZnO nanorods.The results show that the molar ratio of ZnO seed and zinc source controls the growth of ZnO nanorods,（PVA） acts as a spatial obstructor to control the length of ZnO nanorods,the photocatalytic activity of the ZnO nanorods are strong.