形貌可控的四氧化三钴溶剂热合成及反应机理  

Shape-controlled Synthesis and Formation Mechanism of Co3O4 by Solvothermal Method

作　　者：黄可龙[1] 刘人生[1] 杨幼平[1] 刘素琴[1] 王丽平[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《物理化学学报》2007年第5期655-658,共4页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20376086);中南大学"大学生创新创业启航行动"(ZE097)资助项目

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Co0.81^ⅡCo0.19^Ⅲ（OH）2.11（NO3）0.008·0．43H2O；该氧化产物进而缓慢转化成CO3O4．Pure spinel C3O4 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 C0304 included two steps： Co （OH）2-x·（NO3）x formed in solution was oxidated into Co0.8^ⅡCo0.19^Ⅲ（OH）211·（NO3）0.08·0.43H2O firstly, and then transformed to Co3O4.

关 键 词：溶剂热合成 四氧化三钴 反应机理 形貌控制 

分 类 号：O611.3[理学—无机化学]