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Preparation method for multicolor luminescent europium-gadolinium-codoped hydroxyapatite/carbon-dots

A technology of hydroxyapatite and co-doping, which is applied in the direction of luminescent materials, fluorescence/phosphorescence, chemical instruments and methods, etc., to achieve the effect of low cost and simple preparation process

Active Publication Date: 2018-12-04
ZHONGBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, rare earth-doped hydroxyapatite / carbon dots composites are rarely reported

Method used

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  • Preparation method for multicolor luminescent europium-gadolinium-codoped hydroxyapatite/carbon-dots
  • Preparation method for multicolor luminescent europium-gadolinium-codoped hydroxyapatite/carbon-dots
  • Preparation method for multicolor luminescent europium-gadolinium-codoped hydroxyapatite/carbon-dots

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preparation example Construction

[0023] The preparation method of multicolor luminescent europium and gadolinium co-doped hydroxyapatite / carbon dots adopts the following steps:

[0024] (1) Mix the aqueous solution of europium, gadolinium and calcium to obtain calcium europium gadolinium mixed solution, wherein: the molar ratio of europium and gadolinium is 3.8-4.5, the total molar weight of europium and gadolinium and the total molar weight of calcium, europium and gadolinium The ratio is 0.02-0.05; under the condition of stirring, the aqueous solution of phosphorus is slowly dropped into the above-mentioned mixed solution of calcium, europium and gadolinium, wherein: the ratio of the total molar amount of calcium, europium and gadolinium to the molar amount of phosphorus is 1.67;

[0025] (2) Add the sodium citrate aqueous solution that concentration is 0.3-0.5mol / L in the mixed solution that step 1 obtains, the ratio of the molar weight of sodium citrate and the total molar weight of calcium, europium and g...

Embodiment 1

[0030] The preparation method of multicolor luminescent europium and gadolinium co-doped hydroxyapatite / carbon dots adopts the following steps:

[0031] (1) According to the molar ratio of the total molar weight of calcium, europium and gadolinium to phosphorus is 1.67, under the condition of stirring, 80mL concentration is 0.15mol / L (NH 4 ) 2 HPO 4 The aqueous solution was slowly dropped into 133mL Ca(NO 3 ) 2 , Eu(NO 3 ) 3 and Gd(NO 3 ) 3 In the mixed solution of calcium, europium and gadolinium whose total concentration is 0.15mol / L, the molar ratio of europium to gadolinium is 4, and the total molar ratio of europium and gadolinium to the total molar ratio of calcium, europium and gadolinium is 0.03.

[0032] (2) Add 32 mL of sodium citrate aqueous solution with a concentration of 0.5 mol / L to the mixed solution obtained in step 1. The ratio of the molar weight of sodium citrate to the total molar weight of calcium, europium and gadolinium in step 1 is 0.8.

[0033...

Embodiment 2

[0038] (1) According to the molar ratio of the total molar weight of calcium, europium and gadolinium to phosphorus is 1.67, under the condition of stirring, 80mL concentration is 0.15mol / L (NH 4 ) 2 HPO 4 The aqueous solution was slowly dropped into 133mL Ca(NO 3 ) 2 , Eu(NO 3 ) 3 and Gd(NO 3 ) 3 In the mixed solution of calcium, europium and gadolinium whose total concentration is 0.15mol / L, the molar ratio of europium to gadolinium is 4, and the total molar ratio of europium and gadolinium to the total molar ratio of calcium, europium and gadolinium is 0.03.

[0039] (2) Add 20 mL of sodium citrate aqueous solution with a concentration of 0.5 mol / L to the mixed solution obtained in step 1. The ratio of the molar weight of sodium citrate to the total molar weight of calcium, europium and gadolinium in step 1 is 0.5.

[0040] (3) According to the molar ratio of diethylenetriamine to sodium citrate being 1, 1.1 mL of diethylenetriamine was added to the solution obtained...

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Abstract

In view of that blue-light emission is dominated in current carbon-dot / hydroxyapatite compounded systems and multicolor luminescent materials are extensively required in many fields, the invention provides a preparation method, which is novel and environmentally friendly and is simple in preparation process and low in cost, for multicolor luminescent europium (Eu)-gadolinium (Gd)-codoped hydroxyapatite / carbon-dots. According to the preparation method, the multicolor luminescent europium (Eu)-gadolinium (Gd)-codoped hydroxyapatite / carbon-dots are obtained through adding diethylenetriamine intoan aqueous solution of calcium, europium, gadolinium, phosphorus and sodium citrate. The preparation method for the multicolor luminescent europium (Eu)-gadolinium (Gd)-codoped hydroxyapatite / carbon-dots, disclosed by the invention, has the advantages of simple preparation process, low cost, rapidness, and the like.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, and in particular relates to a preparation method of multicolor luminescent europium and gadolinium co-doped hydroxyapatite / carbon dots. Background technique [0002] Multicolor luminescent materials have shown very attractive application values ​​in the fields of detection, sensing, and optoelectronic energy devices. Therefore, the research on luminescent materials with excellent optical properties has attracted great attention from scholars at home and abroad. In recent years, fluorescent carbon dots (CDs for short) have become a research hotspot. Compared with traditional semiconductor quantum dot materials and organic fluorescent dyes, carbon dots have many advantages, such as stable fluorescence, wide absorption spectrum range, easy surface functionalization, abundant raw materials for preparation, low toxicity and good biocompatibility, etc. Therefore, although carbon dots...

Claims

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Application Information

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IPC IPC(8): C09K11/71G01N21/64
CPCC09K11/7796G01N21/643G01N2021/6432
Inventor 常青杨珊珊徐伟薛超瑞李宁王延忠刘炜胡胜亮杨金龙
Owner ZHONGBEI UNIV