Cerium oxide (CeO2-x) nanoparticles with high Ce3+ proportion synthesized by pulsed plasma in liquid

Weijian Ma, Tsutomu Mashimo, Shota Tamura, Makoto Tokuda, Shinichi Yoda, Masayuki Tsushida, Michio Koinuma, Akihisa Kubota, Hiroshi Isobe, Akira Yoshiasa

Research output: Contribution to journalArticle


Cerium oxide (CeO2-x) nanoparticles were synthesized using a simple one-step method known as the pulsed plasma in liquid (PPL). XRD analysis showed the production of pure cubic cerium oxide (Fm 3‾ m). HRTEM and XANES analysis confirmed the monophase cubic CeO2-x, and exclude the presence of the hexagonal Ce2O3 and/or mix phase of CeO2/Ce2O3 in the particle layers. HRTEM analysis showed that most particles were about 3 nm in diameter. XPS analysis showed that the cerium oxide nanoparticles synthesized by the PPL method had a higher Ce3+ proportion (42.2%) than some commercial powders, and also higher than the previous reported nanoparticles. The present cerium oxide nanoparticles showed high visible light-induced photocatalytic activity in the degradation of methyl orange (MO) and better polishing characteristics of quartz glass, compared to commercial samples. These results may attribute to the high Ce3+-ion content and/or the small particle size.

Original languageEnglish
JournalCeramics International
Publication statusAccepted/In press - 2020


  • Ce
  • Cerium oxide
  • Nanoparticles
  • Photocatalyst
  • Polishing characteristics
  • Pulsed plasma in liquid

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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    Ma, W., Mashimo, T., Tamura, S., Tokuda, M., Yoda, S., Tsushida, M., Koinuma, M., Kubota, A., Isobe, H., & Yoshiasa, A. (Accepted/In press). Cerium oxide (CeO2-x) nanoparticles with high Ce3+ proportion synthesized by pulsed plasma in liquid. Ceramics International. https://doi.org/10.1016/j.ceramint.2020.07.093