Preparation of microsized single-crystalline Co_3O_4 by high-temperature hydrolysis  

作　　者：李启厚 刘智勇 刘志宏 胡雷 

机构地区：[1]School of Metallurgical Science and Engineering,Central South University

出　　处：《Journal of Central South University》2011年第4期993-997,共5页中南大学学报（英文版）

基　　金：Project(50704038) supported by the National Natural Science Foundation of China;Project(108170) supported by the Key Foundation of Ministry of Education,China

摘　　要：Microsized single-crystalline Co3O4 has been synthesized by high-temperature hydrolysis of CoCD2H20 at 600℃. The samples were characterized by powder X-ray diffraction （XRD）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The results reveal that the as-prepared powders are microsized single-crystalline CO3O4 with cubic spinel structure. An increase in the high-temperature hydrolysis time results in the evolution of particle shapes from cube to quasi-sphere, and then to octahedron. The effect of NaCl additive on the surface morphologies of Co3O4 particles was experimentally investigated. The results indicate that the NaCl additive acts as an inert disperse phase in the high-temperature hydrolysis, and prevents the aggregation of Co3O4 particles effectively.Microsized single-crystalline Co3O4 has been synthesized by high-temperature hydrolysis of CoCl2·2H2O at 600 °C.The samples were characterized by powder X-ray diffraction(XRD),scanning electron microscopy(SEM) and transmission electron microscopy(TEM).The results reveal that the as-prepared powders are microsized single-crystalline Co3O4 with cubic spinel structure.An increase in the high-temperature hydrolysis time results in the evolution of particle shapes from cube to quasi-sphere,and then to octahedron.The effect of NaCl additive on the surface morphologies of Co3O4 particles was experimentally investigated.The results indicate that the NaCl additive acts as an inert disperse phase in the high-temperature hydrolysis,and prevents the aggregation of Co3O4 particles effectively.

关 键 词：CO3O4 crystal structure HYDROLYSIS surface morphology 

分 类 号：O614.812[理学—无机化学]