Method for manufacturing high purity nano-cerium dioxide
A nano-cerium dioxide, high-purity technology, applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve the problems of insufficient uniformity of nano-CeO2 particles, and achieve stable product quality, strong operability, and heavy weight. good effect
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Embodiment 1
[0018] With Ce(NO 3 ) 3 ·6H 2 Ce(NO 3 ) 3 solution. Use a graduated cylinder to measure N,N dimethylacetamide (DMA), according to Ce(NO 3 ) 3 Mix the above two solutions with N, N dimethylacetamide (DMA) in a molar ratio of 1:5, stir at room temperature for 1 h, and make them fully mixed. Put the resulting mixture into a polytetrafluoroethylene reactor, react at 160°C for 24 hours to obtain a suspension, filter to obtain a solid after cooling, wash the obtained solid product repeatedly with pure water and absolute ethanol, and then place it in an oven Dry at 70°C to obtain a white powder. The obtained white powder was calcined at 800°C for 2 hours and cooled to room temperature to obtain the desired product. The product CeO can be obtained from the results of xrd diagram and transmission electron microscope 2 It is a pure phase, and the product particle size is calculated to be 30-60nm.
Embodiment 2
[0020] With Ce(NO 3 ) 3 ·6H 2 Ce(NO 3 ) 3 solution. Use a graduated cylinder to measure N,N dimethylacetamide (DMA), according to Ce(NO 3 ) 3 Mix the above two solutions with N, N dimethylacetamide (DMA) in a molar ratio of 1:10, stir at room temperature for 0.5 h, and make them fully mixed. Put the resulting mixture into a polytetrafluoroethylene reactor, react at 180°C for 72 hours to obtain a suspension, filter to obtain a solid after cooling, wash the obtained solid product repeatedly with pure water and absolute ethanol, and then place it in an oven Dry at 70°C to obtain a white powder. The obtained white powder was calcined at 400°C for 4 hours and cooled to room temperature to obtain the desired product. The product CeO can be obtained from the results of xrd diagram and transmission electron microscope 2 It is a pure phase, and the product particle size is calculated to be 30-60nm.
Embodiment 3
[0022] With Ce(NO 3 ) 3 ·6H 2 Ce(NO 3 ) 3 solution. Use a graduated cylinder to measure N,N dimethylacetamide (DMA), according to Ce(NO 3 ) 3 Mix the above two solutions with N, N dimethylacetamide (DMA) in a molar ratio of 1:9, stir at room temperature for 0.5 h, and make them fully mixed. Put the obtained mixture into a polytetrafluoroethylene reactor, react at 150°C for 48 hours to obtain a suspension, filter to obtain a solid after cooling, wash the obtained solid product repeatedly with pure water and absolute ethanol, and then place it in an oven Dry at 70°C to obtain a white powder. The obtained white powder was calcined at 700°C for 2 hours and cooled to room temperature to obtain the desired product. The product CeO can be obtained from the results of xrd diagram and transmission electron microscope 2 It is a pure phase, and the product particle size is calculated to be 30-60nm.
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