Preparation method and use of fluorescent carbon quantum dot/polyacrylonitrile nanofiber membrane

A nanofiber membrane and polyacrylonitrile technology, which is applied in the direction of fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of separation and recovery of fluorescent carbon quantum dot materials, and achieve improved photobleaching resistance, good thermal stability, Effect of Good Optical Properties

Inactive Publication Date: 2013-02-27
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Solve the problem of separation and recovery of existing fluores

Method used

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  • Preparation method and use of fluorescent carbon quantum dot/polyacrylonitrile nanofiber membrane
  • Preparation method and use of fluorescent carbon quantum dot/polyacrylonitrile nanofiber membrane
  • Preparation method and use of fluorescent carbon quantum dot/polyacrylonitrile nanofiber membrane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a. Weighing 1g of polyacrylonitrile powder with a molecular weight of 50,000 and 0.2g of fluorescent carbon quantum dots was dissolved in 10g of dimethylformamide under stirring to obtain a polyacrylonitrile viscous solution;

[0020] b. Put the viscous solution into a syringe with a capillary, insert the copper wire connected to the high-voltage generator into the solution, and use the aluminum foil as the receiving electrode. After adjusting the angle and distance between the capillary of the syringe and the receiving device of the aluminum foil, add 10kV to the solution The voltage is spun to obtain the crude product fluorescent carbon quantum dot / polyacrylonitrile nanofiber membrane;

[0021] c. Washing the fluorescent carbon quantum dot / polyacrylonitrile nanofiber membrane obtained in step b with distilled water three times to remove the residual solvent dimethylformamide to obtain the fluorescent carbon quantum dot / polyacrylonitrile nanofiber membrane.

Embodiment 2

[0023] a. Take 1g of polyacrylonitrile powder with a molecular weight of 80,000 and 5.1g of fluorescent carbon quantum dots and dissolve it in 38g of dimethylformamide under stirring to obtain a polyacrylonitrile viscous solution;

[0024] b. Put the viscous solution into a syringe with a capillary, insert the copper wire connected to the high-voltage generator into the solution, and use the aluminum foil as the receiving electrode. After adjusting the angle and distance between the capillary of the syringe and the receiving device of the aluminum foil, add Spinning at a voltage of 30kV to obtain a crude fluorescent carbon quantum dot / polyacrylonitrile nanofiber membrane;

[0025] c. Wash the fluorescent carbon quantum dot / polyacrylonitrile nanofiber membrane obtained in step b with deionized water three times to remove the residual solvent dimethylformamide to obtain the fluorescent carbon quantum dot / polyacrylonitrile nanofiber membrane.

Embodiment 3

[0027] a. Weighing 1g of polyacrylonitrile powder with a molecular weight of 150,000 and 1.0g of fluorescent carbon quantum dots was dissolved in 5g of dimethylformamide under stirring to obtain a polyacrylonitrile viscous solution;

[0028] b. Put the viscous solution into a syringe with a capillary, insert the copper wire connected to the high-voltage generator into the solution, and use the aluminum foil as the receiving electrode. After adjusting the angle and distance between the capillary of the syringe and the receiving device of the aluminum foil, add 5kV to the solution The voltage is spun to obtain the crude product fluorescent carbon quantum dot / polyacrylonitrile nanofiber membrane;

[0029] c. Wash the fluorescent carbon quantum dot / polyacrylonitrile nanofiber membrane obtained in step b with ultrapure water for 3 times, and remove the residual solvent dimethylformamide to obtain the fluorescent carbon quantum dot / polyacrylonitrile nanofiber membrane.

[0030] The ...

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Abstract

The invention relates to a preparation method and a use of a fluorescent carbon quantum dot/polyacrylonitrile nanofiber membrane. The preparation method comprises that polyacrylonitrile and a fluorescent carbon quantum dot as raw materials are prepared into the fluorescent carbon quantum dot/polyacrylonitrile nanofiber membrane by an electrostatic spinning technology. The fluorescent carbon quantum dot/polyacrylonitrile nanofiber membrane is a nanofiber membrane material loaded with the fluorescent carbon quantum dot. The fluorescent carbon quantum dot/polyacrylonitrile nanofiber membrane can be used for selective fluorescence fast detection of Fe<3+> in water, has good heat stability and strong photobleaching resistance, and is an ideal sensitive material for preparation of a high-sensitivity thin film-type sensing device.

Description

technical field [0001] The invention relates to a preparation method of a polyacrylonitrile (PAN) nanofiber membrane loaded with fluorescent carbon quantum dots (CNPs) and its use in Fe in water 3+ applications of selective fluorescence detection. Background technique [0002] Fluorescent materials have become research hotspots due to their application in many important fields, such as biological aspects: cell imaging, biosensing, and controlled release of drugs. At present, fluorescent biomaterials mainly include organic fluorescent dyes, fluorescent proteins and quantum dots. Semiconductor quantum dots have strong fluorescence, high light resistance, wide excitation spectrum, long fluorescence lifetime, and narrow and adjustable emission spectrum. However, semiconducting quantum dots involve the use of toxic heavy metals, such as CdSe, which may cause cytotoxicity and environmental impact. Therefore, people want to develop safe and environmentally friendly fluorescent n...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 李守柱袁群惠王传义
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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