Fabrication, characterization, and electrical conductivity properties of Pr₆O₁₁ nanoparticles

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• 作者：Bahaa M. Abu-Zied ; Youssef A. Mohamed ; Abdullah M. Asiri
• 关键词：nanocrystalline praseodymium oxide ; Pr6O11 ; nanostructured materials ; electrical conductivity ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2013
• 出版时间：July, 2013
• 年：2013
• 卷：31
• 期：7
• 页码：701-708
• 全文大小：984 K

文摘

Pr₆O₁₁ nanoparticles were obtained by subsequent thermal decomposition of the as-prepared precipitate formed under ambient temperature and pressure using NaOH as precipitant. The calcination process was affected, for 1 h in static air atmosphere, at 400-700 ¡ãC temperature range. The different samples were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA), m>in situm> electrical conductivity, and N₂ adsorption/desorption. The obtained results demonstrated that nano-crystalline Pr₆O₁₁, with crystallites size of 6-12 nm, started to form at 500 ¡ãC. Such value increased to 20-33 nm for the sample calcined at 700 ¡ãC. The as-synthesized Pr₆O₁₁ nanoparticles presented high electrical conductivity due to electron hopping between Pr(III)-Pr(IV) pairs.