Synthesis of Yttrium Oxide Nanoneedles with Carbon Dioxide Carbonization

Abstract

In this study, a CO2 carbonization method is introduced for the preparation of 1D yttrium oxide powders. Using YCl3 as the raw material, sodium hydroxide was initially used to completely precipitate Y3+ into yttrium hydroxide, and then CO2 was introduced into the yttrium hydroxide slurry for homogenization-like carbonization to obtain yttrium carbonate precipitation. Then, by studying the effects of carbonization conditions, such as the temperature, CO2 flow rate, and stirring speed, on the morphology and phases of yttrium carbonate, the temperature was observed to exert a greater effect than the other experimental parameters on the morphology and structure of the carbonized products. Finally, Y2(CO3)3·2H2O nanoneedles were obtained at optimal conditions. The carbonized crystals of the acicular yttrium carbonate precipitate because of the solution supersaturation and then quickly complete their crystal growth process through the oriented attachment (OA) and Ostwald ripening (OR) mechanisms. After heat treatment, yttrium carbonate retained a good crystal morphology and produced Y2O3 nanoneedles with a length of 1–2 μm and a width of 20–30 nm.

Efficient route for preparation of Nd3+ doped Y2O3 nanoparticles at intermediate temperature

“…Also, Liu et al improved the quality of yttrium oxide thin films by CVD. Yttria Compounds with RE-dopants, such as lanthanum-doped yttrium oxide nanoceramics, have also been synthesized by the scientists [ [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] , [14] , [15] ]. RE-doped yttria nanopowders have been synthesized by several methods, such as hydrolysis, combustion, high-temperature solid-state reactions, sol-gel, precipitation, molten salt, solvothermal, hydrothermal, etc.…”