摘要：利用化学沉淀法,对前驱体沉淀物在采用苯甲酸水热改性和未改性2种条件下分别制备氧化锌粉体,通过X射线衍射、扫描电镜等表征手段考察苯甲酸水热改性对氧化锌颗粒形貌的影响,并对苯甲酸水热改性片状氧化锌纳米颗粒的形成机理进行探讨。结果表明:在未改性条件下制得的氧化锌为颗粒状,平均粒径为300~400 nm;采用苯甲酸对前躯体沉淀物进行水热改性可得片状氧化锌纳米颗粒,片层厚度为30~60 nm。

关键词：化学沉淀法；苯甲酸；氧化锌纳米颗粒；水热改性

Abstract： By the method of chemical precipitation， zinc oxide powders were prepared with the precipitated precursors hydrothermal modified and unmodified by benzoic acid respectively. The effect of hydrothermal modification by benzoic acid on morphology of zinc oxide particles were characterized by XRD， SEM and other methods. The formation mechanism of zinc oxide nano-particles hydrothermal modified by benzoic acid was discussed. The results show that the zinc oxide particles obtained under the unmodified conditions are granular with average diameter of 300 to 400 nm. Through hydrothermal modifying precipitated precursors by benzoic acid， the zinc oxide nano-sheets can be prepared with thickness of 30 to 60 nm. 

Keywords: chemical precipitation method; benzoic acid; zinc oxide nano-particle; hydrothermal modification