Preparation method of erbium-doped carbon quantum dot composite material taking loofah sponge as carbon source

A technology of carbon quantum dots and composite materials, which is applied in the field of preparation of doped carbon quantum dot composite materials, can solve the problems affecting the application of carbon quantum dots, the dispersibility is not good enough, the reaction time is long, etc. , the effect of simple operation

Inactive Publication Date: 2019-01-11
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, many scholars have used natural organisms such as orange juice, grapefruit peel, leaves, eggs, soybean milk, glucose, and vitamins as carbon sources to synthesize carbon quantum dots. However, most carbon quantum dot synthesis methods have long reaction times, low yields, and high energy consumption. , poor repeatability, poor dispersion and other problems, thus affecting the application of carbon quantum dots

Method used

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  • Preparation method of erbium-doped carbon quantum dot composite material taking loofah sponge as carbon source
  • Preparation method of erbium-doped carbon quantum dot composite material taking loofah sponge as carbon source
  • Preparation method of erbium-doped carbon quantum dot composite material taking loofah sponge as carbon source

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Experimental program
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Effect test

Embodiment 1

[0023] (1) A solution configuration: In the reactor, add deionized water: 64 mL, erbium chloride: 8g, heat and stir to dissolve, cool to room temperature, add absolute ethanol: 35 mL, stir well to obtain A solution ;

[0024] (2) Solution B configuration: In the reactor, add deionized water: 66 mL, oxalic acid: 6 g, heat and stir to dissolve, cool to room temperature, add absolute ethanol: 35 mL, stir well to obtain B solution;

[0025] (3) Preparation of erbium oxalate complex: put 100 mL of B solution in a reactor, stir, and raise the temperature to 45±2°C, add 100 mL of A solution into B solution dropwise, and finish adding with sodium hydroxide Adjust the pH of the solution to 5.2, keep the temperature at 45±2°C, stir and react for 8 hours, and a large amount of precipitate can be obtained. After standing and aging for 3 hours, centrifuge, wash with distilled water for 4 to 6 times, and then wash with ethanol for 2 to 3 times. Drying in a vacuum oven at 60°C to obtain the...

Embodiment 2

[0028] (1) Solution A configuration: In the reactor, add deionized water: 62 mL, erbium chloride: 9 g, heat and stir to dissolve, cool to room temperature, add absolute ethanol: 37 mL, stir well to obtain A solution ;

[0029] (2) Solution B configuration: In the reactor, add deionized water: 68 mL, oxalic acid: 5 g, heat and stir to dissolve, cool to room temperature, add absolute ethanol: 34 mL, stir well to obtain B solution;

[0030] (3) Preparation of erbium oxalate complex: put 80 mL of B solution in a reactor, stir, and raise the temperature to 45±2°C, add 80 mL of A solution into B solution dropwise, and use sodium hydroxide solution Adjust its pH to 5.2, keep the temperature at 45±2°C, stir and react for 8 hours, and a large amount of precipitate can be obtained. After standing and aging for 3 hours, it is centrifuged, washed with distilled water for 4 to 6 times, and then washed with ethanol for 2 to 3 times. Drying in a vacuum oven at 60°C to obtain the erbium oxal...

Embodiment 3

[0033] (1) A solution configuration: In the reactor, add deionized water: 66 mL, erbium chloride: 7 g, heat and stir to dissolve, cool to room temperature, add absolute ethanol: 34 mL, stir well to obtain A solution;

[0034] (2) Solution B configuration: In the reactor, add deionized water: 64 mL, oxalic acid: 7 g, heat and stir to dissolve, cool to room temperature, add absolute ethanol: 37 mL, stir well, and obtain B solution;

[0035](3) Preparation of erbium oxalate complex: put 100 mL of B solution in a reactor, stir, and raise the temperature to 45±2°C, add 80 mL of A solution into B solution dropwise, and finish adding with sodium hydroxide Adjust the pH of the solution to 5.2, keep the temperature at 45±2°C, stir and react for 8 hours, and a large amount of precipitate can be obtained. After standing and aging for 3 hours, centrifuge, wash with distilled water for 4 to 6 times, and then wash with ethanol for 2 to 3 times. Drying in a vacuum oven at 60°C to obtain the ...

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Abstract

The invention discloses a preparation method of an erbium-doped carbon quantum dot composite material taking loofah sponge as a carbon source. The preparation method is characterized by comprising thefollowing steps: firstly, reacting erbium chloride and oxalic acid to prepare an erbium oxalate complex; then adding the following components into a reactor according to the mass percent: 91 to 95 percent of 1-allyl-3-methylimidazolium chloride and 4 to 8 percent of loofah sponge powder; raising the temperature to a range of 100+ / -2 DEG C and keeping the temperature constant; stirring, reacting for 8h and then adding 0.5 to 2 percent of the erbium oxalate complex; keeping the temperature constant at 100+ / -2 DEG C, and stirring; and reacting for 5h to obtain a light yellow transparent liquid,i.e., the erbium-doped carbon quantum dot composite material. The preparation method has the advantages of greenness and environment protection, and simplicity in operation; the erbium-doped carbon quantum dot composite material can have the characteristics of high fluorescence performance stability, small and uniform size, good biocompatibility and the like, without the need of secondary modification; and a rare-earth erbium element is doped so that the fluorescence performance can be improved by about 40 percent.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano-luminescent materials, in particular to a preparation method and application of an erbium-doped carbon quantum dot composite material using loofah as a carbon source. Background technique [0002] Carbon quantum dots are nanomaterials with carbon as the skeleton structure. They are dispersed spherical nanoparticles with a size of less than 10nm, generally including nanodiamonds, carbon particles and graphene quantum dots, also known as carbon dots, carbon nanodots, carbon nanocrystals. Similar to various metal quantum dots, carbon quantum dots can fluoresce brightly when illuminated. Carbon quantum dots are the most important kind of fluorescent carbon nanomaterials. It has unique small size characteristics and superior fluorescent properties: carbon quantum dots have bright and stable fluorescence, wide excitation spectrum, narrow emission spectrum, and the emission wavelength can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/77C09K11/65B82Y20/00B82Y30/00
CPCB82Y20/00B82Y30/00C09K11/77
Inventor 李慧芝裴梅山韩斌
Owner UNIV OF JINAN
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