Journal of Materials Science

, Volume 52, Issue 11, pp 6697–6711 | Cite as

Co(II) ethylene glycol carboxylates for Co3O4 nanoparticle and nanocomposite formation

  • K. Assim
  • S. Schulze
  • M. Pügner
  • M. Uhlemann
  • T. Gemming
  • L. Giebeler
  • M. Hietschold
  • T. Lampke
  • H. Lang
Original Paper


Ethylene glycol-functionalized Co(II) carboxylates [Co(CO2CH2(OC2H4) n OMe)2] (2a, n = 1; 2b, n = 2), [Co(CO2CHPh(OC2H4)2OMe)2] (2c) and [Co(CO2CMe2(O–C2H4)2OMe)2] (2d) have been synthesized by the reaction of [Co(OAc)2·4H2O] with the corresponding acids MeO(C2H4O) n CRR′CO2H (n = 1, 2; R=H, R′=Me; R=H, R′=Ph). Based on the IR spectroscopic studies, the binding motif of the carboxylato ligands to cobalt is discussed. Thermogravimetry and mass spectrometry studies were carried out in order to investigate the thermal decomposition mechanism of 2a2d in the solid state. Based on the result obtained, complex 2b was chosen as single-source precursor for the generation and stabilization of Co3O4 nanoparticles (NPs) by solid-state thermal decomposition in air. Depending on the decomposition time, NPs with different chemical composition (consisting of Co3O4, CoO and Co) and with crystallite sizes ranging from 9 to 18 nm were obtained. Furthermore, the preparation of cobalt oxide-based nanocomposites by twin polymerization of 2,2′-spirobi[4H-1,3,2-benzodioxasiline] (3) in the presence of 2b is reported. After treatment of the as-prepared hybrid material by either oxidation or etching, the respective mesoporous carbon/silica (IUPAC type IV isotherms) matrices were obtained. Quenched solid and nonlinear density functional theory calculations gave a surface area of 1040 cm2 g−1 for the respective carbon and 336 cm2 g−1 for the appropriate silica material. Powder X-ray diffraction measurements confirm the formation of Co3O4 NPs in both components. High-angle annular dark field scanning transmission electron microscopy revealed well-distributed particles within the silica matrix, whereas no particles were found in the carbon material. The electrochemical properties of the composite materials have been investigated by cyclic voltammetry. The respective silica material shows five reduction events (Co3O4 to CoO, CoO to Co), while no redox potentials occurred for the Co3O4 NPs embedded in the carbon matrix.


Co3O4 Solid Electrolyte Interphase Methanesulfonic Acid Silica Component Dark Field Scanning Transmission Electron 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We gratefully acknowledge the Deutsche Forschungsgemeinschaft (DFG) (GRK 1215—Material and Concepts for Advanced Interconnects and Nanosystems) for generous financial support. Cornelia Kowol from Fraunhofer Institute for Electronic Nano Systems (ENAS) is acknowledged for measuring the SEM and EDX spectra, and H. Gnägi (Diatome AG, Biel, Switzerland) is thanked for TEM sample preparations. The authors would also like to thank T. Windberg from the group of Prof. Dr. S. Spange for taking the N2 adsorption/desorption measurements.

Supplementary material

10853_2017_904_MOESM1_ESM.docx (1.5 mb)
Supplementary material 1 (DOCX 1539 kb)


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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • K. Assim
    • 1
  • S. Schulze
    • 2
  • M. Pügner
    • 3
  • M. Uhlemann
    • 4
  • T. Gemming
    • 4
  • L. Giebeler
    • 4
  • M. Hietschold
    • 2
  • T. Lampke
    • 3
  • H. Lang
    • 1
  1. 1.Technische Universität Chemnitz, Faculty of Natural SciencesInstitute of Chemistry, Inorganic ChemistryChemnitzGermany
  2. 2.Technische Universität Chemnitz, Faculty of Natural SciencesInstitute of Physics, Solid Surface AnalysisChemnitzGermany
  3. 3.Technische Universität Chemnitz, Faculty of Mechanical EngineeringInstitute of Material Science and Engineering, Materials and Surface EngineeringChemnitzGermany
  4. 4.Leibniz Institute for Solid State and Materials Research Dresden e. V., IFW DresdenDresdenGermany

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