【摘要】 采用溶剂热法合成了纯相立方晶型四氧化三钴.用聚乙二醇作分散剂,调整溶剂正丁醇和水的比例,可实现对纯相Co₃O₄的形貌和尺寸大小的控制.采用IR,XRD,TG-DTA和TEM等方法跟踪反应过程,对溶剂热法合成Co₃O₄的反应机理进行了研究.实验表明合成Co₃O₄的反应机理分为两步:Co（OH）₂-x·（NO₃）_x被氧化为Co_0.81^ⅡCo_0.19^Ⅲ（OH）_2.11（NO₃）_0.08·0.43H₂O;该氧化产物进而缓慢转化成Co₃O₄.更多还原

【Abstract】 Pure spinel Co3O4 was successfully synthesized by solvothermal method with polyethylene glycol as dispersant. The shape and size of the final product can be controlled by adjusting the solvent ratio of n-butanol to water. The interim product was characterized by IR, X-ray powder diffraction (XRD), TG-DTA, and transmission electron microscope (TEM). The results showed that the formation mechanism of Co3O4 included two steps: Co(OH)2-x·(NO3)x formed in solution was oxidated into Co0.81IICo0.19III(OH)2.11·(NO3)0.08·0.43H2O firstly, and then transformed to Co3O4.更多还原