Characterization of nano-InVO4 powders synthesized by the hydrothermal process on various In/V molar ratio and soaking conditions

June Min Yao, Chung Kang Lee, Shien Jen Yang, Chii-Shyang Hwang

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12 Citations (Scopus)


Various hydrothermal parameters such as the In/V ratio of starting materials, soaking time and additives were conducted to examine the resulting phase formation and particle morphology of InVO4. The possible reaction during InVO4 formation was proposed. The powders were characterized by X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy and BET (Brunauer-Emmett-Teller) surface area measurement. Optical properties were investigated by UV-vis and Fourier transform infrared spectroscopy. The XRD patterns indicated a single InVO4 phase formed at the starting In/V ratio of 1/2 and In(OH)3, Na2V6O16 coexisted with InVO4 when the In/V ratio was 1/1 and 1/3, respectively. For the vanadium-rich samples (In/V = 1/3), the second phase of Na2V6O16 increased with the increasing soaking time and demonstrated significant absorption in UV-vis spectra than pure InVO4. The size and shape of InVO4 particles could be tailored from rod-like into rounded square particles by PVP additives, acting as structure-directing-agent (SDA), up to 0.3 wt%.

Original languageEnglish
Pages (from-to)740-745
Number of pages6
JournalJournal of Alloys and Compounds
Issue number1-2
Publication statusPublished - 2009 Jul 29

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

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