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Preparation method of silicate fluorescent composite material with layered structure

A layered silicate, composite material technology, applied in the field of material chemistry, can solve the problems of quenching, broadened fluorescence, emission spectrum shift, etc., to achieve the effect of improving fluorescence performance and fluorescence intensity

Inactive Publication Date: 2021-06-29
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aggregation of organic fluorescent molecules can easily cause the shift, broadening or fluorescence quenching of the emission spectrum, thereby reducing the luminous efficiency and limiting its practical application.

Method used

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  • Preparation method of silicate fluorescent composite material with layered structure
  • Preparation method of silicate fluorescent composite material with layered structure
  • Preparation method of silicate fluorescent composite material with layered structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The chrysotile samples were first sieved, then ground, sieved with 200 mesh, and rhodamine B aqueous solutions with different concentrations were prepared.

[0056] Weigh 0.1 g of 200 mesh halloysite and add it to 30 mL of rhodamine B aqueous solution.

[0057] After shaking for 5 hours, it was taken out, centrifugally filtered, and the solid matter was dried to obtain a powdery composite material. Take the filtrate supernatant, measure its absorbance, and calculate the adsorption amount of the composite material.

[0058] The thermodynamic adsorption curves of different initial concentrations of RhB (1mg / L-about 17mg / L) and chrysotile are as follows: figure 1 shown.

Embodiment 2

[0060] The lizardite samples were first sieved and ground, sieved with 200 mesh, and rhodamine B aqueous solutions with different concentrations were prepared.

[0061] Weigh 0.1 g of 200 mesh halloysite and add it to 30 mL of rhodamine B aqueous solution.

[0062] After shaking for 5 hours, it was taken out, centrifugally filtered, and the solid matter was dried to obtain a powdery composite material. Take the filtrate supernatant, measure its absorbance, and calculate the adsorption amount of the composite material.

[0063] The thermodynamic adsorption curves of different initial concentrations of RhB (1mg / L-about 150mg / L) and lizardite are as follows: figure 2 as shown,

Embodiment 3

[0065] The halloysite sample was first sieved, then ground, sieved with 200 mesh, and rhodamine B aqueous solutions with different concentrations were prepared.

[0066] Weigh 0.1 g of 200 mesh halloysite and add it to 30 mL of rhodamine B aqueous solution.

[0067] After shaking for 5 hours, it was taken out, centrifugally filtered, and the solid matter was dried to obtain a powdery composite material. Take the filtrate supernatant, measure its absorbance, and calculate the adsorption amount of the composite material.

[0068] The thermodynamic adsorption curves of different initial concentrations of RhB (1mg / L-about 200mg / L) and halloysite are as follows: image 3 as shown,

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Abstract

The invention provides a fluorescent composite material formed by compounding layered silicate and organic fluorescent molecules, and a preparation method thereof. The preparation method comprises the following steps: preparing layered silicate and organic fluorescent molecules, adding silicate into a fluorescent molecule solution, and treating to obtain the fluorescent composite material. The adsorption capacity of the composite material is calculated by measuring the residual content of the fluorescent molecules in a filtrate, the fluorescence performance of the obtained fluorescent composite material is improved compared with that of the fluorescent molecules, particularly, the fluorescence performance is improved to different extents after different minerals are compounded with the fluorescent molecules, and after the halloysite is compounded with rhodamine B, the fluorescence intensity is obviously improved.

Description

technical field [0001] The invention relates to a layered structure silicate fluorescent composite material and a preparation method thereof, belonging to the field of material chemistry. Background technique [0002] Organic fluorescent molecules are currently widely used in various fields such as chemistry and materials chemistry because of their advantages such as various types, rich colors, good adjustability, and high color purity. It has shown broad application prospects in multi-color display, lighting devices, etc., and has attracted much attention from the scientific and technological circles and industrial circles of various countries. [0003] Common organic fluorescent molecules include rhodamines, coumarins, quinacridones, etc. However, the mutual aggregation of organic fluorescent molecules can easily cause the shift, broadening or fluorescence quenching of the emission spectrum, thereby reducing the luminous efficiency and limiting its practical application. ...

Claims

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Application Information

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IPC IPC(8): C09K11/06C09K11/02G01N21/64
CPCC09K11/06C09K11/025G01N21/64C09K2211/1007C09K2211/1088G01N2021/6417
Inventor 吕国诚刘学文饶文秀刘梦廖立兵
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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