Nano cobalt and porous zinc–cobalt oxide particles were synthesized using the concept of coordination compounds of the type [M(II)L,L′] (where M(II) = Co(II) & Zn(II) L= 4-hydroxy benzaldehyde and L′ = piperazine) and were thoroughly characterized. Because the precursors are coordination compounds possessing specific geometry in the crystal lattice, uniform and appropriately sized homo- and heterometallic nanocrystals of Co₃O₄ and ZnO·Co₃O₄ were obtained after a thermal process. The homo and hetero composite particles were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), FT IR spectroscopy and electrochemistry. The paramagnetic chemical shift of the methyl protons in DMSO due to the nanoparticles was studied by NMR spectroscopy, which indicated that the cobalt particles were ferromagnetic. The structural design modification and surface area of Co₃O₄ was improved by adding the ZnO component. DFT calculations were done to validate the nano structure. Supercapacitance ability of the nanoparticles was studied by cyclic voltammetry, and electrochemical calculations were performed to determine the microelectronic characteristics of the material. The specific capacitance was estimated at 207.3 and 51.1 F g⁻¹ for the ZnO·Co₃O₄ and Co₃O₄ electrodes, respectively. Clearly, ZnO·Co₃O₄ exhibited a much higher specific capacitance than the Co₃O₄ nanocrystal, which was attributed to better conductivity and higher surface area. The capacitance activity showed multifold enhancement due to the porous nature of Zn oxide in the heterometallic nano ZnO·Co₃O₄ composite.

中文翻译：

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通过使用配位化合物的煅烧工艺合成同质和异质金属钴和锌纳米氧化物颗粒：它们的表征，DFT计算和电容行为研究

纳米钴和多孔锌钴氧化物颗粒是使用 [M( II )L,L']型配位化合物的概念合成的（其中 M( II ) = Co( II ) & Zn( II ) L= 4-羟基苯甲醛和 L' = 哌嗪）并进行了彻底的表征。因为前体是在晶格中具有特定几何形状的配位化合物，所以均匀且尺寸合适的 Co ₃ O ₄和 ZnO·Co ₃ O _{4的同质和异质金属纳米晶体}是经过热处理后获得的。通过透射电子显微镜(TEM)、扫描电子显微镜(SEM)、能量色散X射线分析(EDX)、X射线衍射(XRD)、FT IR光谱和电化学对均质和异质复合颗粒进行了表征。通过核磁共振波谱研究了纳米颗粒对DMSO中甲基质子的顺磁性化学位移，表明钴颗粒具有铁磁性。_{Co 3} O ₄的结构设计改性和表面积通过添加 ZnO 成分得到改善。进行 DFT 计算以验证纳米结构。通过循环伏安法研究了纳米粒子的超电容能力，并进行了电化学计算以确定材料的微电子特性。ZnO·Co ₃ O ₄和Co ₃ O ₄电极的比电容分别估计为207.3和51.1 F g ^{-1 。}显然，ZnO·Co ₃ O _{4表现出比 Co 3} O ₄高得多的比电容。纳米晶体，这归因于更好的导电性和更高的表面积。_{由于异金属纳米ZnO·Co 3} O ₄复合材料中氧化锌的多孔性，电容活性表现出多倍的提高。