Skip to main content
SpringerLink
Log in

Low temperature synthesis of Co2SiO4/SiO2 nanocomposite using a modified sol–gel method

  • Original Paper
  • Published:
Journal of Sol-Gel Science and Technology Aims and scope Submit manuscript

Abstract

The paper presents a study on the preparation of Co2SiO4/SiO2 nanocomposites by a new modified sol–gel method. We have prepared gels starting from tetraethylorthosilicate (Si(OC2H5)4), cobalt nitrate Co(NO3)2·6H2O and some diols: ethylene glycol (C2H6O2), 1,2propanediol (C3H8O2) and 1,3propanediol (C3H8O2), for a final composition: 30% CoO/70% SiO2. During the heating of the gels at 140 °C, a redox reaction takes place between NO3 − ions and diol with formation of some carboxylate anions. These carboxylate anions react with the Co(II) ions to form coordination compounds embedded in silica matrix, as evidenced by FT-IR spectrometry and thermal analysis. These Co(II) coordinative compounds thermally decompose in the range 250–300 °C to the corresponding oxides: CoO and/or Co3O4 inside the matrices pores. When CoO results, it reacts with SiO2 at low temperature leading to Co2SiO4, which crystallizes at 700 °C. XRD patterns of the samples annealed at temperatures lower than 700 °C were characteristic to amorphous phases. The samples annealed at temperatures ≥700 °C, contain Co2SiO4 (olivine) as unique crystalline phase inside the amorphous silica matrix, according to XRD patterns. As evidenced by TEM images, Co2SiO4 nanoparticles are homogenously dispersed inside the silica matrix.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11

Similar content being viewed by others

References

  1. Lin H-K, Chiu H-C, Tsai H-C, Chien S-H, Wang C-B (2003) Synthesis, characterization and catalytic oxidation of carbon monoxide over cobalt oxide. Catal Lett 88:169–174

    Article  CAS  Google Scholar 

  2. Ortega G, Araujo-Andrade C, Compean-Jasso ME, Martinez JR, Ruiz F (2002) Cobalt oxide/silica xerogels powders: X-ray diffraction, infrared and visible absorption studies. J Sol-Gel Sci Tech 24:23–29

    Article  Google Scholar 

  3. Martucci A, Busso D, Guglielmi M, Zbroniec L, Koshizaki N, Post M (2004) Optical gas sensing properties of silica film doped with cobalt oxide nanocrystals. J Sol-Gel Sci Tech 32:243–246

    Article  CAS  Google Scholar 

  4. Cui H, Zayat M, Levi D (2006) Effect of HCl on the PPO assisted sol-gel synthesis of olivine-type Co2SiO4 ultrafine particles. J Sol-Gel Sci Techn 40:83–87

    Article  CAS  Google Scholar 

  5. Yan J, Buckley AM, Greenblatt M (1995) The preparation and characterization of silica gels doped with copper complexes. J Non-Cryst Solids 180:180–190

    Article  CAS  ADS  Google Scholar 

  6. Esposito S, Turco M, Ramis G, Bagnasco G, Pernice P, Pagliuca C, Bevilacqua M, Aronne A (2007) Cobalt-silicon mixed oxide nanocomposites by modified sol-gel method. J Solid State Chem 180:3341–3350

    Article  CAS  ADS  Google Scholar 

  7. Taguchi H, Takeda Y, Shibahara H (2002) Synthesis of olivine-type Co1.6SiO4 at low temperature. Mat Lett 52:412–416

    Article  CAS  Google Scholar 

  8. Stefanescu M, Dippong T, Stoia M, Stefanescu O (2008) Study on the obtaining of cobalt oxides by thermal decomposition of some complex combinations, undispersed and dispersed in SiO2 matrix. J Therm Anal Cal 94:389–393

    Article  CAS  Google Scholar 

  9. Stefanescu M, Stoia M, Stefanescu O, Popa A, Simon M, Ionescu C (2007) The interaction between teos and some polyols. Thermal analysis and FTIR. J Therm Anal Cal 88:19–26

    Article  CAS  Google Scholar 

  10. Brinker CJ, Scherrer GW (1990) Sol-gel science: the physics and chemistry of sol-gel Processing. Academic Press, New York

    Google Scholar 

  11. Lenza RFS, Vasconcelos WL (2003) Study of the influence of some DCCAs on the structure of sol–gel silica membranes. J Non-Cryst Solids 330:216

    Article  CAS  ADS  Google Scholar 

  12. Ocotlan-Flores J, Saniger JM (2006) Catalyst-free SiO2 sonogels. J Sol-Gel Sci Techn 39:235–240

    Article  CAS  Google Scholar 

  13. Shinde VR, Mahadik SB, Gujar TP, Lokhande CD (2006) Supercapacitive cobalt oxide (C03O4) thin films by spray pyrolysis. Appl Surf Sci 252:7487–7492

    Article  CAS  ADS  Google Scholar 

  14. Joint Committee on Powder Diffraction Standards-International Center for Diffraction Data (1999)

  15. Stefanescu M, Stoia M, Stefanescu O (2007) The interaction between TEOS and some polyols. Thermal analysis and FT-IR. J Sol-Gel Sci Techn 41:71–78

    Article  CAS  Google Scholar 

Download references

Acknowledgments

This work was supported by the National Project No. 71-026 NANOPART and financed by CNMP-ANCS through Romanian Ministry of Education and Research.

Author information

Authors and Affiliations

  1. Faculty of Industrial Chemistry and Environmental Engineering, University “Politehnica” of Timisoara, P-ta Victoriei nr. 2., 300006, Timisoara, Romania

    Marcela Stoia, Mircea Stefanescu, Thomas Dippong & Oana Stefanescu

  2. Faculty of Physics, West University of Timisoara, Bv. V. Parvan no. 4, 300223, Timisoara, Romania

    Paul Barvinschi

Authors
  1. Marcela Stoia
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Mircea Stefanescu
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Thomas Dippong
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Oana Stefanescu
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Paul Barvinschi
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Marcela Stoia.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Stoia, M., Stefanescu, M., Dippong, T. et al. Low temperature synthesis of Co2SiO4/SiO2 nanocomposite using a modified sol–gel method. J Sol-Gel Sci Technol 54, 49–56 (2010). https://doi.org/10.1007/s10971-010-2156-2

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10971-010-2156-2

Keywords

Search

Navigation