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

Active Publication Date: 2017-06-20
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the upconversion nanocrystals reported for water detection in recent years have an excitation wavelength of 980nm [ACS Appl. Mater. Interfaces., 2016, 8, 847-853], which is easily absorbed by organisms The overheating effect, which damages the cell tissue, greatly hinders its application

Method used

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  • Nd&lt;3+&gt; sensitized core-shell upconversion nanocrystal material, and preparation method and application thereof in water detection
  • Nd&lt;3+&gt; sensitized core-shell upconversion nanocrystal material, and preparation method and application thereof in water detection
  • Nd&lt;3+&gt; sensitized core-shell upconversion nanocrystal material, and preparation method and application thereof in water detection

Examples

Experimental program
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Effect test

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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Abstract

The invention provides a Nd<3+> sensitized core-shell upconversion nanocrystal material, and a preparation method and application thereof in water detection. The developed Nd<3+> sensitized core-shell upconversion nanocrystal material can effectively detect the water content in organic solvent. The upconversion nanocrystal provided by the invention is prepared by taking oleic acid and octadecene as solvent and rare earth chloride as a reactant through a coprecipitation method, and is then subjected to surface treatment by means of HCl. The nanocrystal material has the advantages of high detection convenience, high accuracy, favorable chemical stability and the like. The obtained product is regular in shape, uniform in size and narrow in particle size distribution. The invention combines Nd<3+> sensitization and core-shell structure design to realize the multimode excitation of the upconversion nanocrystal. The Nd<3+> sensitization design favorably overcomes an overheating effect caused by exciting light in a water detection process. Hopefully, the nanocrystal material is widely used in the fields of chemical industry production and biological lesion detection.

Description

technical field [0001] The invention belongs to the field of solid luminescent materials, in particular to a kind of Nd 3+ Sensitized core-shell up-conversion nanocrystalline material and its preparation method and water detection application. Background technique [0002] Water is the most common substance on the earth. It is an important resource for the survival of all life including inorganic compounds and human beings, and it is also the most important component of organisms. In the field of chemical industry, such as the production of petroleum and chemical reagents, water is a common impurity; in the field of biomedicine, the water content of different organs and tissues in organisms is an important health indicator. Therefore, accurate measurement of water is of great significance to applications such as industrial production, scientific research, and biomedical lesion detection. [0003] In recent years, the detection of solution content based on fluorescence anal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/85B82Y20/00B82Y30/00B82Y40/00G01N21/64
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/02C09K11/7773G01N21/6428
Inventor 陈大钦徐敏
Owner HANGZHOU DIANZI UNIV
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