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Aqueous sol–gel synthesis and thermoanalytical study of the alkaline earth molybdate precursors

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Abstract

The preparation and characterization of the M′–Mo–O nitrate–tartrate (M′ = Mg, Ca, Sr, and Ba) gels, which were produced by the simple aqueous sol–gel method and calcined at 500, 600, 700, 800, 900, and 1,000 °C temperatures are reported. The crystalline alkaline earth metal molybdates (MgMoO4, CaMoO4, SrMoO4, and BaMoO4) and as-prepared M′–Mo–O nitrate–tartrate gels investigated by thermal analysis (TG/DSC), X-ray diffraction (XRD), and scanning electron microscopy (SEM). TG/DSC analysis showed the possible decomposition mechanism of synthesized gels. XRD studies allowed the identification of main types of crystalline structures in the MgMoO4, CaMoO4, SrMoO4, and BaMoO4 systems. Moreover, SEM analysis revealed the changes of surface morphology of the final compounds depending on annealing temperatures.

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Acknowledgements

The study was funded from the European Community’s social foundation under Grant Agreement No. VP1-3.1-ŠMM-08-K-01-004/KS-120000-1756.

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Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Chemistry, Vilnius University, Naugarduko Str. 24, 03225, Vilnius, Lithuania

    Gediminas Braziulis, Gytautas Janulevicius, Ruta Stankeviciute & Arturas Zalga

  2. Department of General Physics and Spectroscopy, Faculty of Physics, Vilnius University, Sauletekio Av. 9, Bld. III, 10222, Vilnius, Lithuania

    Arturas Zalga

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  1. Gediminas Braziulis
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  2. Gytautas Janulevicius
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Correspondence to Arturas Zalga.

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Braziulis, G., Janulevicius, G., Stankeviciute, R. et al. Aqueous sol–gel synthesis and thermoanalytical study of the alkaline earth molybdate precursors. J Therm Anal Calorim 118, 613–621 (2014). https://doi.org/10.1007/s10973-013-3579-0

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  • DOI: https://doi.org/10.1007/s10973-013-3579-0

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