A three-dimensional nayf 4 Upconversion luminescent micro flower and preparation method thereof
A micro-flower, three-dimensional technology, applied in luminescent materials, chemical instruments and methods, photovoltaic power generation, etc., can solve the problems of difficult to obtain three-dimensional three-dimensional micro-particles, environmental pollution by surfactants, and troublesome post-processing of products. , to achieve the effect of good effect, lower energy consumption and shorter time.
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[0042] see figure 1 , in this example, the three-dimensional NaYF 4 The preparation method of the upconversion luminescent microflora comprises the following steps:
[0043] Step S10, to the containing Y 3+ , Yb 3+ and Er 3+ Ethanolamine was added to the initial solution to obtain a precursor solution.
[0044] wherein, in the initial solution, the Y 3+ provided by at least one of yttrium nitrate and yttrium chloride, and / or the Yb 3+ provided by at least one of ytterbium nitrate and ytterbium chloride; and / or, the Er 3+ Provided by at least one of erbium nitrate and erbium chloride. That is, Y 3+ It can be provided for yttrium nitrate dissolved in water, also can be provided for yttrium chloride dissolved in water, and can also be provided for yttrium nitrate and yttrium chloride dissolved in water at the same time. Yb 3+ and Er 3+ The principle is the same as the above, and will not be repeated here. In a preferred embodiment, the initial solution is obtained by ...
Embodiment 1
[0057] Press Y 3+ : Yb 3+ : Er 3+ The molar ratio is 78:20:2. Weigh 1 mmol of yttrium nitrate, ytterbium nitrate and erbium nitrate and dissolve them in 10 mL of water to form an initial solution. Add 1.5 mL of ethanolamine to the initial solution under magnetic stirring at 600 r / min, and stir for 5 min to obtain the precursor solution. Under magnetic stirring at 600 r / min, 24 mmol NaBF was 4 The reaction solution is added to the precursor solution, and concentrated hydrochloric acid is added to the reaction solution to adjust the pH to 9 to obtain a colloidal solution. The colloidal solution was added to the autoclave and heated in an oven at 100 °C for 60 min. After the reaction kettle was cooled to room temperature, centrifuged, washed three times with absolute ethanol and water ultrasonically, and dried at 80 °C to obtain a three-dimensional flower-shaped yellow luminescent NaYF. 4 : 20% Yb 3+ / 2%Er 3+ Up-converting microcrystalline.
Embodiment 2
[0059] Press Y 3+ : Yb 3+ : Er 3+ The molar ratio is 78:20:2. Weigh 1 mmol of yttrium nitrate, ytterbium nitrate and erbium nitrate and dissolve them in 10 mL of water to form an initial solution. Add 1.5 mL of ethanolamine to the initial solution under magnetic stirring at 600 r / min, and stir for 5 min to obtain the precursor solution. Under magnetic stirring at 600 r / min, 24 mmol NaBF was 4 adding concentrated hydrochloric acid to the reaction solution to adjust the pH to 10 to obtain a colloidal solution. The colloidal solution was added to the autoclave and heated in an oven at 100 °C for 60 min. After the reaction kettle was cooled to room temperature, centrifuged, washed three times with absolute ethanol and water ultrasonically, and dried at 80 °C to obtain a three-dimensional flower-shaped orange luminescent NaYF. 4 : 20% Yb 3+ / 2%Er 3+ Up-converting microcrystalline.
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