Nd<3+> sensitized core-shell upconversion nanocrystal material, and preparation method and application thereof in water detection
A nanocrystalline material and nanocrystalline technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve problems such as damaging cell tissue and hindering applications
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example 1
[0065] Example 1: Yb / Er(20 / 1mol%):NaGdF 4 @Yb / Nd(20 / 10mol%):NaYF 4 @NaGdF 4 Core-shell up-conversion nanocrystals:
[0066] The rare earth chloride (total molar mass is 0.8mmol, wherein GdCl 3 ·6H 2 O (0.632mmol), YbCl 3 ·6H 2 O (0.16mmol), ErCl 3 ·6H 2 O (0.008mmol)) was added to the mixed solution of oleic acid (8ml) and octadecene (12ml), fully dissolved at 150°C to form a transparent solution and cooled to room temperature, then added dissolved NaOH (2mmol) and NH 4 Methanol solution (5ml) of F (3mmol), methanol is discharged at 50°C, then heated to 280°C under N 2 Under protection, it was incubated for 90 minutes, and finally cooled to room temperature, and the solution obtained by the reaction was washed with ethanol and hexanaphthene to obtain the required nuclear sample (Yb / Er(20 / 1mol%):NaGdF 4 ), and dispersed in cyclohexane (3ml);
[0067] Rare earth chloride (total molar mass is 0.8mmol, YCl 3 ·6H 2 O (0.56mmol), YbCl 3 ·6H 2 O(0.16mmol) and NdCl 3 ·6...
example 2
[0071] Example 2: Yb / Er(20 / 1mol%):NaGdF 4 @Yb / Nd(20 / 10mol%):NaYF 4 Core-shell upconversion nanocrystals:
[0072] The rare earth chloride (total molar mass is 0.8mmol, wherein GdCl 3 ·6H 2 O (0.632mmol), YbCl 3 ·6H 2 O (0.16mmol), ErCl 3 ·6H 2 O (0.008mmol)) was added to the mixed solution of oleic acid (8ml) and octadecene (12ml), fully dissolved at 150°C to form a transparent solution and cooled to room temperature, then added dissolved NaOH (2mmol) and NH 4 Methanol solution (5ml) of F (3mmol), methanol is discharged at 50°C, then heated to 280°C under N 2 Under protection, it was incubated for 90 minutes, and finally cooled to room temperature, and the solution obtained by the reaction was washed with ethanol and hexanaphthene to obtain the required nuclear sample (Yb / Er(20 / 1mol%):NaGdF 4 ), and dispersed in cyclohexane (3ml);
[0073] Rare earth chloride (total molar mass is 0.8mmol, YCl 3 ·6H 2 O (0.56mmol), YbCl 3 ·6H 2 O(0.16mmol) and NdCl 3 ·6H 2 O (0.0...
example 3
[0076] Example 3: Yb / Er(20 / 1mol%):NaGdF 4 @Yb / Nd(20 / 10mol%):NaYF 4 @NaGdF 4 Core-shell up-conversion nanocrystals:
[0077] Rare earth chloride (total molar mass is 1mmol, wherein GdCl 3 ·6H 2 O (0.79mmol), YbCl 3 ·6H 2 O (0.2mmol), ErCl 3 ·6H 2 O (0.01mmol)) was added to the mixed solution of oleic acid (8ml) and octadecene (12ml), fully dissolved at 140°C to form a transparent solution and cooled to room temperature, then added dissolved NaOH (2mmol) and NH 4 Methanol solution (10ml) of F (3mmol), methanol is discharged at 50°C, then heated to 270°C under N 2 Under protection, it was incubated for 100 minutes, cooled to room temperature at last, and the solution obtained by the reaction was washed with ethanol and hexanaphthene to obtain the required nuclear sample (Yb / Er(20 / 1mol%):NaGdF 4 ), and dispersed in cyclohexane (6ml);
[0078] Rare earth chloride (total molar weight is 1mmol, YCl 3 ·6H 2 O (0.7mmol), YbCl 3 ·6H 2 O(0.2mmol) and NdCl 3 ·6H 2 O (0.1mm...
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