Synthesis and water splitting activity of NaTaO 3 photocatalyst by hydrothermal method and solvothermal method

Yuma Matsumoto, Koji Tomita, Yoshika Sekine, Masato Kakihana

Research output: Contribution to journalArticlepeer-review


We prepared NaTaO 3 by hydrothermal method and solvothermal method. Na 2Ta 2O 6 was obtained by hydrothermal treatment of water soluble tantalum complex and NaOH. On the other hand NaTaO 3 was obtained by solvothermal treatment of TaCI 5 and NaOH in methanol. Many samples were synthesized in various hydrothermal condition, however all samples were Na 2Ta 2O 6 or amorphous. Primary particle size of samples obtained by solvothermal method was 10 nm. Primary particles aggregated and formed 20-50 nm secondly particles. Moreover, specific surface area Of NaTaO 3 synthesized by the solvothermal method was 109 m 2/g. Therefore we succeeded in obtaining NaTaO 3 fine particles with high specific surface area. NaTaO 3 sample loaded NiO of 6 wt% produced H 2 of 600 μl/h. When solvothermal treatment time was extended from 5 hours to 10 hours and stirring in solvothermal treatment, water splitting activity Of NaTaO 3 was improved.

Original languageEnglish
Pages (from-to)578-583
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Issue number10
Publication statusPublished - 2011 Oct


  • Hydrothermal method
  • Photocatalyst
  • Solvothermal method
  • Water splitting

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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