A bismuth orthosilicate nano-luminescent material with egg yolk-eggshell structure and preparation method thereof
A technology of nanomaterials and orthosilicic acid, which is applied in the field of nanoluminescent materials, can solve the problems of less research and reports on luminescent nanomaterials, and achieve good up-conversion luminescence performance, simple operation, and convenient adjustment.
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Embodiment 1
[0049] 0.352mmol Bi(NO 3 ) 3 ·5H 2 O, 0.04mmol Yb(NO 3 ) 3 ·5H 2 O and 0.008mmol Er(NO 3 ) 3 ·6H 2 O was dissolved in 5ml of dilute nitric acid solution, stirred and dissolved at room temperature to obtain solution A. Then 2.8mmol urea and 0.3g polyvinylpyrrolidone (molecular weight ~ 40000) were dissolved in 25mL ethylene glycol solution to obtain solution B. Then, solution B was slowly added to solution A, stirred and mixed evenly at room temperature, transferred to a hydrothermal reaction kettle, and reacted at 150°C for 5 hours. The obtained product was separated by centrifugation, washed several times with distilled water, and then dried in an oven. Take the above 100mg dried sample, disperse it in the mixed solution of 40ml ethanol and 10ml water, and ultrasonically disperse it at room temperature, then add 1mL ammonia water to the above mixed solution, then slowly add 0.2mL orthosilicate ethyl ester dropwise, at room temperature After stirring for 4 h, the pro...
Embodiment 2
[0058] 0.356mmol Bi(NO 3 ) 3 ·5H 2 O, 0.04mmol Yb(NO 3 ) 3 ·5H 2 O and 0.004 mmol Tm(NO 3 ) 3 ·6H 2 O was dissolved in 5ml of dilute nitric acid solution, stirred and dissolved at room temperature to obtain solution A. Then 1.6 mmol of urea and 0.1 g of polyvinylpyrrolidone (molecular weight ~ 40,000) were dissolved in 25 mL of ethylene glycol solution to obtain solution B. Then, solution B was slowly added to solution A, stirred and mixed evenly at room temperature, then transferred to a hydrothermal reactor, and reacted at 120°C for 5 hours. The obtained product was separated by centrifugation, washed several times with distilled water, and then dried in an oven. Take the above 100mg dried sample, disperse it in the mixed solution of 40ml ethanol and 10ml water, and ultrasonically disperse it at room temperature, then add 0.8mL ammonia water to the above mixed solution, then slowly add 0.15mL ethyl orthosilicate dropwise, at room temperature After stirring for 5 h,...
Embodiment 3
[0061] 0.356mmol Bi(NO 3 ) 3 ·5H 2 O, 0.04mmol Yb(NO 3 ) 3 ·5H 2 O and 0.004 mmol Ho(NO 3 ) 3 ·6H 2 O was dissolved in 5ml of dilute nitric acid solution, stirred and dissolved at room temperature to obtain solution A. Then 4 mmol of urea and 0.2 g of polyvinylpyrrolidone (molecular weight ~ 40000) were dissolved in 25 mL of ethylene glycol solution to obtain solution B. Then, solution B was slowly added to solution A, stirred and mixed evenly at room temperature, then transferred to a hydrothermal reaction kettle, and reacted at 160°C for 8 hours. The obtained product was separated by centrifugation, washed several times with distilled water, and then dried in an oven. Take the above 100mg dried sample, disperse it in the mixed solution of 40ml ethanol and 10ml water, and ultrasonically disperse it at room temperature, then add 1mL ammonia water to the above mixed solution, then slowly add 0.25mL orthosilicate ethyl ester dropwise, at room temperature After stirring...
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