Preparation method of hollow yttrium oxide micro/nanospheres
A technology of yttrium trioxide and hollow spheres is applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., to achieve broad application prospects and wide practicability.
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Embodiment 1
[0020] Dubbed 0.3mol / L Y(NO 3 ) 3 solution, titrate the above Y(NO 3 ) 3 solution, the titration rate was controlled at 3mL / min, and kept stirring until the turbidity just turned into a translucent gel, and the titration was stopped. Take 2ml of monodisperse polystyrene microsphere suspension with a mass fraction of 3%, add 80ml of isopropanol and stir at room temperature, mix evenly with ultrasonic waves, and add concentrated ammonia water to adjust the pH value to 8, then add 5ml of the above-mentioned solution dropwise at a speed of 3ml / min. Gel, after the dropwise addition, stir at room temperature for 5h and filter with suction, wash with isopropanol for 3 times and then wash with water for 3 times, then put the filter cake in an oven and dry at 50°C for 12h, and finally place the dried product in a muffle furnace After calcination at 700°C for 5 hours, a white solid powder was obtained. The product was identified as diyttrium trioxide by X-ray powder diffraction, and...
Embodiment 2
[0022] Dubbed 0.5mol / L Y(NO 3 ) 3 solution, titrate the above Y(NO 3 ) 3 solution, the titration rate was controlled at 3mL / min, and kept stirring until the turbidity just turned into a translucent gel, and the titration was stopped. Take 2ml of polymethyl methacrylate microsphere suspension with a mass fraction of 4%, add 80ml of isopropanol and stir at room temperature, mix evenly with ultrasound, and add concentrated ammonia water to adjust the pH value to 9, then drop in 6ml at a speed of 3ml / min The above gel, after the dropwise addition, was stirred at room temperature for 5 hours and suction filtered, washed 3 times with isopropanol, and then washed 3 times with water, then put the filter cake in an oven and dry it at 50°C for 12 hours, and finally put the dried product in a muffle After calcining at 900°C for 5 hours in a furnace, a white solid powder is obtained. The product was identified as diyttrium trioxide by X-ray powder diffraction, and its morphology was a...
Embodiment 3
[0024] Dubbed 0.5mol / L Y(NO 3 ) 3 solution, titrate the above Y(NO 3 ) 3 solution, the titration rate was controlled at 3mL / min, and kept stirring until the turbidity just turned into a translucent gel, and the titration was stopped. Take 2ml of poly(styrene-methyl methacrylate) copolymer microsphere suspension with a mass fraction of 3%, add 60ml of isopropanol and stir at room temperature, mix evenly by ultrasonic, and add concentrated ammonia water to adjust the pH value to 8, then add 3ml Add 4ml of the above gel dropwise at a speed of 1 / min, after the dropwise addition, stir at room temperature for 5h and suction filter, wash with isopropanol for 3 times, and then wash with water for 3 times, then put the filter cake in an oven and dry at 50°C for 12h. Finally, the dried product is placed in a muffle furnace and calcined at a high temperature of 1200° C. for 4 hours to obtain diyttrium trioxide hollow sphere powder.
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