Process for preparing water-soluble up-conversion NaYF4:Er<3+>,Yb<3+> nano-crystalline using glycyl alcohol as solvent
A technology of glycerol and nanocrystals, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of easy particle aggregation, difficult size control, and reduced luminous efficiency, so as to avoid particle adhesion, particle size increase, The effect of improving dispersion
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Embodiment 1
[0036] Preparation of upconverting NaYF 4 :Er 3+ , Yb 3+ The method of nanocrystal, reaction is 1h, and reaction temperature is 220 ℃, and n(EDTA) / n(RE) molar ratio is 1: 1, and wherein, n(EDTA) represents the total molar amount of ETDA, and n(RE) represents ( Y 3+ 、Er 3+ , Yb 3+ ) sum of molar consumption; It is made up of following process and steps:
[0037] 1) Take 1.05g NaF and put it into a conical flask, add 150ml glycerol and heat it with an electric furnace, stir while heating to make it all dissolve, and obtain solution A.
[0038] 2) Put 0.7445g of EDTA into a conical flask, add 50ml of glycerol and heat with an electric furnace, stir while heating to make it all dissolve, and obtain solution B.
[0039] 3) Weigh 0.0212g Er(NO 3 ) 3 , 0.1221g Yb(NO 3 ) 3 , 0.4198gY (NO 3 ) 3 Put it into the same Erlenmeyer flask, add 50ml glycerol and heat it with an electric furnace, stir while heating to make it all dissolve, and obtain solution C.
[0040] 4) Mix sol...
Embodiment 2
[0047] Preparation of upconverting NaYF 4 :Er 3+ , Yb 3+ For nanocrystals, the reaction time is 2h, n(EDTA) / n(RE)=1:1, and the reaction temperature is 220°C.
[0048] 1) Take 1.05g NaF and put it into a conical flask, add 150ml glycerol and heat it with an electric furnace, stir while heating to make it all dissolve, and obtain solution A.
[0049] 2) Put 0.7445g of EDTA into a conical flask, add 50ml of glycerol and heat with an electric furnace, stir while heating to make it all dissolve, and obtain solution B.
[0050] 3) Weigh 0.0212g Er(NO 3 ) 3 , 0.1221g Yb(NO 3 ) 3 , 0.4198gY (NO 3 ) 3 Put it into the same Erlenmeyer flask, add 50ml glycerol and heat it with an electric furnace, stir while heating to make it all dissolve, and obtain solution C.
[0051] 4) Mix solution A and solution B to obtain solution D, and transfer it into a three-necked flask.
[0052] 5) Add solution C to solution D, heat with an electric furnace, and stir with an electric stirrer while...
Embodiment 3
[0058] Preparation of upconverting NaYF 4 :Er 3+ , Yb 3+ For nanocrystals, the reaction time is 3 hours, n(EDTA) / n(RE)=1:1, and the reaction temperature is 220°C.
[0059] 1) Take 1.05g NaF and put it into a conical flask, add 150ml glycerol and heat it with an electric furnace, stir while heating to make it all dissolve, and obtain solution A.
[0060] 2) Put 0.7445g of EDTA into a conical flask, add 50ml of glycerol and heat with an electric furnace, stir while heating to make it all dissolve, and obtain solution B.
[0061] 3) Weigh 0.0212g Er(NO 3 ) 3 , 0.1221g Yb(NO 3 ) 3 , 0.4198gY (NO 3 ) 3 Put it into the same Erlenmeyer flask, add 50ml glycerol and heat it with an electric furnace, stir while heating to make it all dissolve, and obtain solution C.
[0062] 4) Mix solution A and solution B to obtain solution D, and transfer it into a three-necked flask.
[0063] 5) Add solution C to solution D, heat with an electric furnace, and stir with an electric stirrer ...
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