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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Mater. | doi: 10.3389/fmats.2019.00254

Flame spray synthesis of VOPO4 Polymorphs

  • 1The Ohio State University, United States
  • 2Stony Brook Medicine, United States
  • 3Stony Brook University, United States

VOPO4 is a polymorphic compound that exhibits excellent catalytic and electronic properties. Here, formation of different VOPO4 polymorphs two different organic components as precursors is investigated for the first-time using flame spray pyrolysis process as an alternative method to hydrothermal synthesis of VOPO4, the only method currently known for its synthesis. Ammonium based salts of Vanadium and Phosphorous dissolved in aqueous solution were used as precursor for the process. The products from the flame spray process were found to be hollow and amorphous particles in range of 2-10µm with shell thickness in in between 200-300nm. Upon calcination and oxidation, the size of spherical particles grew in diameter and crystallization proceeded. However, the surface of calcined particles showed it was composed of smaller grains in the size range of 0.5-1µm. Finally, the size dependence stability of different polymorph of VOPO4 is discussed as well as the effect of the different precursors used to stabilize Alpha-II and Beta VOPO4 polymorphs.

Keywords: FSP synthesis, VOPO4, Sensing, polymorphs, nanomaterials, nanomanufacturing

Received: 28 Jun 2019; Accepted: 25 Sep 2019.

Copyright: © 2019 Jodhani, Mikaeili and Gouma. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence:
Dr. Gagan Jodhani, The Ohio State University, Columbus, 43210, Ohio, United States, gaganjodhani@gmail.com
Prof. Perena Gouma, The Ohio State University, Columbus, 43210, Ohio, United States, gouma.2@osu.edu