Cerium oxide (CeO2-x) nanoparticles with high Ce3+ proportion synthesized by pulsed plasma in liquid. Issue 17 (1st December 2020)

• Record Type: Journal Article
• Authors: Ma, Weijian; Mashimo, Tsutomu; Tamura, Shota; Tokuda, Makoto; Yoda, Shinichi; Tsushida, Masayuki; Koinuma, Michio; Kubota, Akihisa; Isobe, Hiroshi; Yoshiasa, Akira
• Is Part Of: Ceramics international. Volume 46:Issue 17(2020)
• Page Start: 26502
• Page End: 26510
• Publication Date: 2020-12-01
• Subjects: Cerium oxide -- Nanoparticles -- Pulsed plasma in liquid -- Ce3+ -- Polishing characteristics -- Photocatalyst; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.07.093
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: 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 Ce2 O3 and/or mix phase of CeO2 /Ce2 O3 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 Ce 3+ 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 Ce 3+ -ion content and/or the small particle size.