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Carbon dot/chitosan detector with dual detection function and preparation method thereof

A chitosan and detector technology, which is applied in the field of carbon dot/chitosan detector and its preparation, can solve the problems of poor anti-interference and low detection specificity, and achieves convenient and diverse detection, wide sources, Mild effect of preparation conditions

Inactive Publication Date: 2017-09-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned detection applications only use the fluorescence characteristics of carbon dots alone for detection or the electrochemical properties of carbon dots for detection, and the detection methods all have certain deficiencies, such as low detection specificity, detection anti-interference Poor etc.

Method used

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  • Carbon dot/chitosan detector with dual detection function and preparation method thereof
  • Carbon dot/chitosan detector with dual detection function and preparation method thereof
  • Carbon dot/chitosan detector with dual detection function and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] A method of carbon dot / chitosan detector with double detection function constructed by electrodeposition method, it comprises the steps:

[0029] 1) Preparation of carbon dot / chitosan composite electrodeposition solution: take 2g chitosan powder, add it to a beaker filled with 100ml distilled water, stir magnetically for 10 hours to dissolve chitosan, add 0.1M hydrochloric acid during the stirring process The solution adjusts the pH of the chitosan solution, controls the pH of the chitosan solution at 5.5, and obtains a chitosan solution with a mass concentration of 2 g / mL after stirring. Take 20 g of chitosan solution and place it in a microwave oven for microwave treatment. After 8 minutes, take out the microwave product, add 30 mL of distilled water, stir magnetically at room temperature for 8 hours to fully dissolve the microwave product in distilled water, and put it in a high-speed centrifuge for 20 minutes. , the centrifugation speed is 8000 rpm, and after centri...

Embodiment 2

[0037] A method of carbon dot / chitosan detector with double detection function constructed by electrodeposition method, it comprises the steps:

[0038] 1) Preparation of carbon dot / chitosan composite electrodeposition solution: take 3g of solid chitosan powder, add it to a beaker filled with 150ml distilled water, stir magnetically for 11 hours to dissolve chitosan, add 0.3M The hydrochloric acid solution adjusts the pH of the chitosan solution, and controls the pH of the chitosan solution between 5.6. After stirring, a chitosan solution with a mass concentration of 2 g / mL is obtained. Take 30mL of chitosan solution and place it in a microwave oven for microwave treatment. After 9 minutes, take out the microwave product, add 40mL of distilled water, stir magnetically at room temperature for 10 hours to fully dissolve the microwave product in distilled water, and put it in a high-speed centrifuge for 15 minutes. , the centrifugation speed is 9000 rpm, and the supernatant is ta...

Embodiment 3

[0044] A method of carbon dot / chitosan detector with double detection function constructed by electrodeposition method, it comprises the steps:

[0045] 1) Preparation of carbon dot / chitosan composite electrodeposition solution: take 3g of solid chitosan powder, add it to a beaker filled with 100ml distilled water, stir magnetically for 12 hours to dissolve chitosan, add 0.5M The hydrochloric acid solution adjusts the pH of the chitosan solution, controls the pH of the chitosan solution at 5.7, and obtains a chitosan solution with a mass concentration of 3 g / mL after stirring. Take 50mL of chitosan solution and place it in a microwave oven for microwave treatment. After 10 minutes, take out the microwave product, add 50mL of distilled water, stir magnetically at room temperature for 12 hours to fully dissolve the microwave product in distilled water, and put it in a high-speed centrifuge for 10 minutes. , the centrifugation speed is 10000 rpm, and the supernatant is taken afte...

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Abstract

The invention provides a carbon dot / chitosan detector with a dual detection function, which is established by an electrodeposition method. A preparation method of the carbon dot / chitosan detector with the dual detection function comprises the following steps: 1) preparing a carbon dot / chitosan compound electrodepositing solution; and 2) electrodepositing carbon dot / chitosan and establishing the detector. The carbon dot / chitosan detector is applied to dual-function detection. The carbon dot / chitosan detector has the advantages of simple preparation method, convenience in operation, mild preparation condition, easiness in control, simple equipment, energy conservation, environment friendliness, low cost and the like; the established carbon dot / chitosan detector has two detection functions of electrochemical detection and fluorescence detection at the same time, so that the effect of detecting some substances can be better achieved; and the carbon dot / chitosan detector has a good application prospect in the fields of detectors and biosensors.

Description

technical field [0001] The invention belongs to the fields of polymer materials, nanometer materials, bioelectronic devices and the like, and in particular relates to a carbon dot / chitosan detector with double detection functions constructed by an electrodeposition method and a preparation method thereof. Background technique [0002] Carbon dots (CDs) refer to carbon nanoparticles with a particle size of less than 10nm and photoluminescent properties. As a new type of fluorescent quantum dots, carbon dots have the advantages of non-toxicity and good biocompatibility compared with traditional quantum dots [Journal of Materials Chemistry, 2012, 22(46): 24230-24253]. In recent years, carbon dots have been widely used in the detection of metal ions, small organic molecules, anions, and biomolecules due to their photoluminescence, photostability, and adjustable luminescence intensity. Its principle of action can be summarized as that the measured substance reacts with the carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N27/27
CPCG01N21/6402G01N21/6486G01N27/27
Inventor 王艺峰胡倩王霞秦超然郭传航栗雪倩蔡秀如朱玉洁
Owner WUHAN UNIV OF TECH
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