Abstract
Phase of block-type structure and formula Fe8V10W16O85 has been synthesized by a solution method using Fe(NO3)3·9H2O, NH4VO3 and (NH4)6W12O39·xH2O as a metal precursors. Brown solid obtained after evaporation of water at 60 °C has been heated in air at temperatures selected based on results of measurements with the aid of differential thermal analysis and thermogravimetric analysis up to 1000 °C. Products obtained after selected stages of heating have been investigated with the help of X-ray diffraction, infrared spectroscopy and diffusion reflectance spectroscopy in the near-infrared range. Results of investigations have revealed several stages of thermal decomposition of precursor with the FeVO4, monoclinic WO3 and unknown phase as intermediate products. Single-phase sample of Fe8V10W16O85 has been obtained after heating stage at 800 °C. Tungsten precursor (NH4)6W12O39·xH2O has been subjected to thermoanalytical and spectroscopic study as well. Process of thermal decomposition of tungsten precursor runs with formation of hexagonal WO3 and ammonium bronze (NH4)0.33−xWO3, with monoclinic WO3 as a final product of decomposition.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
