Nanocrystalline Pr6O11: Preparation, characterization, and electrical conductivity properties
Bahaa M. Abu-Zieda,b,c, Youssef A. Mohamedb, Abdullah M. Asiria,c
a Chemistry Department, Faculty of Science , King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
b Chemistry Department, Faculty of Science, Assiut University, 71516 Assiut, Egypt
c Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203 , Jeddah 21589, Saudi Arabia
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This work describes the preparation of praseodymium oxide, Pr6O11, nanoparticles using the precipitation method. Pr3+ ions were precipitated using NaOH solution. The obtained product was filtered, dried, and then calcined for 1h at 400-700 °C temperature range in static air atmosphere. The obtained solids were characterized using X-ray diffractometry (XRD), thermogravimetry (TGA), in situ electrical conductivity, electron microscopy (FESEM & TEM), and nitrogen adsorption at -196 °C. The obtained results revealed that Pr6O11 with crystallites size of 6-12 nm is formed at 400 °C. Such value increased to 20–33 nm for the sample calcined at 700 °C. The high electrical conductivity of Pr6O11 nanoparticles was attributed to the electron hopping between Pr3+-Pr4+ pairs.
Keywords: Nanocrystalline praseodymium oxide; Pr6O11; electrical conductivity