Comprehensive Experimental Design and Teaching Practice of Hydrothermal Reduction of Pr6O11 For the Preparation of Pure Phase Pr(OH)3 Nanoparticles
Rare earth compounds have attracted sustained attention due to their unique optical,magnetic,electrical and catalytic properties,among which rare earth hydroxides are important intermediates for the synthesis of numerous functional materials,so the preparation of pure phase rare earth hydroxides is particularly important.Praseodymium oxide Pr6O11 is considered to be a combination of Pr2O3(Ⅲ)and PrO2(IV)valence oxides.In this experimental project,the mixed-valence Pr6O11 was used as the research object,and the one-step preparation of pure-phase Pr(OH)3 nanoparticles was realized by changing the hydrothermal reaction medium,and the side-by-side comparative experiments were conducted with the single-valence Pr2O3 raw material to analyze the change of the valence state of praseodymium ion in the hydrothermal medium.In the experimental course,students not only practiced the valence change of praseodymium ions in hydrothermal medium,but also learned how to use the valence of praseodymium ions as a raw material.In the experimental course,the students not only practiced the experimental operation skills,teamwork and innovation ability,but also improved their analytical ability and scientific research literacy.
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