CoC_2O_4·2H_2O纳米晶形貌可控合成  

Morphology-controlled Synthesis of CoC_2O_4·2H_2O Nanocrystals

作　　者：胡庆华[1,2] 王玺堂[1] 王周福[1] 陈浩[2] 

机构地区：[1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,武汉430081 [2]九江学院化学与环境工程学院,九江332005

出　　处：《人工晶体学报》2011年第5期1328-1332,1337,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(50872098);湖北省自然科学基金创新团队(2009CDA050)

摘　　要：通过简单调节反应介质热塑性酚醛树脂与乙二醇配比,选择性地制备了CoC2O4.2H2O纳米棒和纳米片晶体或其两种形貌晶体混合物。样品热重和差示扫描量热(TG-DSC)、X射线粉体衍射(XRD)、场发射扫描电镜(FESEM)实验表明:以热塑性酚醛树脂为反应介质得到了CoC2O4.2H2O纳米棒;以乙二醇为反应介质得到了CoC2 O4.2H2 O纳米片;逐渐增大乙二醇和酚醛树脂质量比,实现了CoC2 O4.2H2 O形貌由纳米棒形貌转变为纳米片形貌。基于不同晶体形貌和实验结果,提出了棒状和片状CoC2O4.2H2O可能的形成机理模型以解释两种形貌CoC2 O4.2H2 O纳米晶的生长行为。CoC2O4·2H2O nanocrystals with various morphologies such as nanorods and nanosheets or both of them were prepared by adjusting the weight ratio of navolac and ethylene glycol which played as the synthetic media.The as-prepared products were characterized by the simultaneous thermal analysis（TG-DSC）,powder X-ray diffraction（XRD）,field-emission scanning electron microscope（FESEM）.The results show that CoC2O4·2H2O nanorods were obtained with navolac as synthetic media and CoC2O4·2H2O nanosheets were synthesized with ethylene glycol（EG）.In addition,with the increased weight ratio of EG and navolac,the morphology of the prepared CoC2O4·2H2O was altered from nanorod morphology to nanosheet morphology.Based on the different morphologies and experimental results,the possible formation mechanisms of rod-like and sheet-like CoC2O4·2H2O were also proposed to illustrate the growth behaviors of the different morphologic CoC2O4·2H2O nanocrystals.

关 键 词：热塑性酚醛树脂 CoC2O4.2H2O 纳米棒 纳米片 

分 类 号：TQ424.25[化学工程]