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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。
The CoC2O4.2H2O nanorods and nanosheet crystals or their morphological crystal mixtures were selectively prepared by simply adjusting the ratio of the phenolic resin to ethylene glycol in the reaction medium. Thermogravimetry and differential scanning calorimetry (TG-DSC), X-ray powder diffraction (XRD) and field emission scanning electron microscopy (FESEM) experiments showed that the CoC2O4.2H2O nanorods were obtained by using the thermoplastic phenolic resin as the reaction medium. Ethylene glycol as the reaction medium to obtain CoC2 O4.2H2 O nanosheets; gradually increasing the mass ratio of ethylene glycol to the phenolic resin, to achieve the CoC2 O4.2H2 O morphology transformed from a nanorod topography to a nanosheet morphology. Based on different crystal morphologies and experimental results, the possible formation mechanism models of rod-shaped and plate-shaped CoC2O4.2H2O were proposed to explain the growth behavior of CoC2 O4.2H2 O nanocrystals.