Europium-doped cerium-gadolinium composite oxide red fluorescent powder as well as preparation method and application thereof
A technology of composite oxides and red phosphors, applied in chemical instruments and methods, luminescent materials, climate sustainability, etc., can solve problems such as low quantum yield, achieve increased specific surface area, enhanced luminous intensity, and enhanced fluorescence intensity Effect
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Embodiment 1
[0043]Embodiments of the present invention provide a method for preparing a red phosphoric powder doped with biotic composite oxide, at least comprises the steps:
[0044]Step 1, 0.03 g of soluble starch was weighed, 100 ml of distilled water, stirred at 60 ° C for 45min, to obtain a transparent starch solution, and heat preservation;
[0045]The nitrate solution of 28.2 ml of a concentration of 0.2 mol / L and a 9.0 ml concentration of 0.2 mol / L were mixed mixed with 1.6655gce (NO).3)3· 6h2O, mix well, mixed solution;
[0046]Step 2, the mixed solution was slowly added to a 60 ° C starch solution, and the added time was 8 min, stirred vigorously for 30 min, and then the pH of the solution was 10.0 with concentrated ammonia water, and the reaction was allowed to stand at 60 ° C. The prediment is separated, and the precipitate washing was neutralized, and 12 h was dried in an oven at 80 ° C to obtain a precursor;
[0047]Step three, placing the precursor in the muffle furnace, temperature abov...
Embodiment 2
[0049]Embodiments of the present invention provide a method for preparing a red phosphoric powder doped with biotic composite oxide, at least comprises the steps:
[0050]Step 1, 0.025 g of soluble starch is weighed, 100 mL of distilled water, stirred at 55 ° C for 50 min, to obtain a transparent starch solution, and heat insulation;
[0051]The nitrate solution of 27.8 ml of concentration of 0.2 mol / L was taken and 8.6 ml of concentration of 0.2 mol / L of nitrate hydrogencium solution mixed, and 1.6670gce (NO3)3· 6h2O, mix well, mixed solution;
[0052]Step 2, the mixed solution was slowly added to a 55 ° C starch solution, and the addition time was 5 min, stirred vigorously for 30 min, and then the pH of the solution was 10.2 with concentrated ammonia water, and the reaction was allowed to stand at 55 ° C for 70 min, and the solution was allowed to stand The prediment is separated, and the precipitate washing was neutralized, and 12 h was dried in an oven at 80 ° C to obtain a precursor...
Embodiment 3
[0055]Embodiments of the present invention provide a method for preparing a red phosphoric powder doped with biotic composite oxide, at least comprises the steps:
[0056]Step 1, 0.035 g of soluble starch is weighed, 100 mL of distilled water, stirred at 65 ° C for 40 min, to obtain a transparent starch solution, and heat insulation;
[0057]The nitrate solution of 20 ml of concentration of 0.2 mol / L and 6.6 ml of concentration of 0.2 mol / L were mixed, and 1.1667gce was added (NO3)3· 6h2O, mix well, mixed solution;
[0058]Step 2, the mixed solution was slowly added to a 65 ° C starch solution, and the addition time was 10 min, stirred vigorously for 30 min, and then the pH of the solution was 9.8 with concentrated ammonia water, and the reaction was continued at 65 ° C for 50 min, and the solution was allowed to stand The prediment is separated, and the precipitate washing was neutralized, and 12 h was dried in an oven at 80 ° C to obtain a precursor;
[0059]Step three, placing the precur...
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