Simple and rapid synthesis of ZrO 2 nanoparticles from Zr(OEt) 4 and Zr(OH) 4 using a hydrothermal method

Minori Taguchi, Seiichi Takami, Tadafumi Adschiri, Takayuki Nakane, Koichi Sato, Takashi Naka

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34 Citations (Scopus)


A simple and rapid technique was established for synthesis of ZrO 2 nanoparticles from zirconium ethoxide (Zr(OEt) 4) and zirconium hydroxide (Zr(OH) 4) as the precursors, using the sub- or supercritical hydrothermal method. The precursors were treated in a batch-type reactor with the reaction temperatures between 200 and 500 °C for 10 min. The products obtained at temperatures higher than 300 °C had mixtures of tetragonal and monoclinic phases. The higher the reaction temperature, the higher the volume fraction of the monoclinic phase. Selection of a suitable precursor is the most important point in this synthesis technique. Zr(OH) 4 was found to be a better precursor for obtaining ZrO 2 with a higher volume fraction of monoclinic phase than Zr(OEt) 4 under the same synthesis conditions. Single phase pure monoclinic ZrO 2 was successfully obtained after heat treatment at 500 °C. The growth rate of ZrO 2 nanoparticles obtained from Zr(OEt) 4 and Zr(OH) 4 was different. The products contained some chemisorbed water and/or a hydroxide group on the surface. Their presence was dependent on the reaction temperature and the particle size, and not on the precursor used. However, there was no significant difference among the band gaps of ZrO 2 synthesized from different precursors, confirming that the type of precursor does not affect the quality as much as the crystallinity of the products.

Original languageEnglish
Pages (from-to)2117-2123
Number of pages7
Issue number6
Publication statusPublished - 2012 Mar 21

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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