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Synthesis of thoria nanoparticles via the hydrothermal method in supercritical condition
, Article Materials Letters ; Volume 81 , 2012 , Pages 99-101 ; 0167577X (ISSN) ; Malekzadeh, A ; Ahmadi, S. J ; Hosseinpour, M ; Sharif University of Technology
Elsevier
2012
Abstract
Thorium dioxide (thoria) nano-particle was synthesized by employing supercritical water (SCW) as an excellent reaction environment for hydrothermal crystallization of metal oxide particles. This method is ideal for production of ultrafine powder having controlled stoichiometry, high quality, purity and crystallinity. The nano-crystalline thoria was prepared in a stainless steel (316 L) autoclave, fed with an aqueous solution of Th(NO 3) 4.5H 2O as a reactant and took place under SCW condition up to 450 °C for 45 min. The product was recovered and characterized by X-Ray Diffraction (XRD), Thermal Gravimetry Analysis (TG/DTA) and Brunauer, Emmett and Teller (BET) surface area analysis. The...