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Carbon dots, preparation method thereof and application of carbon dots in detection of hypochlorite

A technology of carbon dots and fluorescent carbon dots, applied in chemical instruments and methods, nanocarbons, measuring devices, etc., to achieve the effect of stable fluorescence properties and high fluorescence quantum yield

Inactive Publication Date: 2021-10-29
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there has recently been increasing evidence that ClO - Excessive use may produce many diseases on the human body, such as osteoarthritis, cancer, kidney disease and other diseases

Method used

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  • Carbon dots, preparation method thereof and application of carbon dots in detection of hypochlorite
  • Carbon dots, preparation method thereof and application of carbon dots in detection of hypochlorite
  • Carbon dots, preparation method thereof and application of carbon dots in detection of hypochlorite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for preparing carbon dots is provided, comprising the steps of:

[0046] Step 1: Weigh 0.5g of 2,4-difluorobenzoic acid, 1.25g of glycine and 0.2g of melamine respectively for later use.

[0047] Step 2: Put the above-mentioned medicines weighed into 30mL ultrapure water (the water resistivity is 18.4MΩ·cm -1 ) and 2mL of absolute ethanol in a 50mL polytetrafluoroethylene reactor, stir and mix.

[0048] Step 3: Put the reaction kettle in an oven and heat it at a constant temperature of 180°C for 24 hours, then lower the temperature to 25°C.

[0049] Step 4: Put the obtained brown solution into a 500Da dialysis bag, and put it into a beaker filled with 2L of ultrapure water for dialysis to remove impurities to obtain a light yellow carbon dot solution.

Embodiment 2

[0051] A method for preparing carbon dots is provided, comprising the steps of:

[0052] Step 1: Weigh 0.1g of 2,4-difluorobenzoic acid, 0.5g of glycine and 0.1g of melamine respectively for later use.

[0053] Step 2: Put the above-mentioned medicines weighed into 30mL ultrapure water (the water resistivity is 18.4MΩ·cm -1 ) and 0.1mL absolute ethanol in a 50mL polytetrafluoroethylene reactor, stir and mix.

[0054] Step 3: Put the reactor in an oven and heat it at a constant temperature of 120°C for 6 hours, then lower the temperature to 25°C.

[0055] Step 4: Put the obtained brown solution into a 500Da dialysis bag, and put it into a beaker filled with 2L of ultrapure water for dialysis to remove impurities to obtain a light yellow carbon dot solution.

Embodiment 3

[0057] A method for preparing carbon dots is provided, comprising the steps of:

[0058] Step 1: Weigh 1g of 2,4-difluorobenzoic acid, 2.5g of glycine and 0.5g of melamine respectively for later use.

[0059] Step 2: Put the above-mentioned medicines weighed into 30mL ultrapure water (the water resistivity is 18.4MΩ·cm -1 ) and 5mL of absolute ethanol in a 50mL polytetrafluoroethylene reactor, stir and mix.

[0060] Step 3: Put the reactor in an oven and heat it at a constant temperature of 200°C for 48 hours, then lower the temperature to 25°C.

[0061] Step 4: Put the obtained brown solution into a 500Da dialysis bag, and put it into a beaker filled with 2L of ultrapure water for dialysis to remove impurities to obtain a light yellow carbon dot solution.

[0062] The carbon dot prepared in Example 1 is characterized, and the specific characterization results are as follows:

[0063] 1. Characterize the carbon dots prepared in the above-mentioned embodiment 1 by transmissi...

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Abstract

The invention discloses carbon dots, a preparation method thereof and application of the carbon dots in hypochlorite detection. The preparation method of the carbon dots comprises the following steps: respectively weighing 0.1-1 g of 2,4-difluorobenzoic acid, 0.5-2.5 g of glycine and 0.1-0.5 g of melamine for later use; putting the weighed chemicals into a reaction kettle filled with ultrapure water and absolute ethyl alcohol, and uniformly stirring and mixing; heating the reaction kettle at 120-200 DEG C for 6-48 hours, and then cooling the reaction kettle to room temperature; and adding the obtained brown solution into a dialysis bag, putting the dialysis bag into ultrapure water, and dialyzing to remove impurities so as to obtain a light yellow carbon dot solution. The carbon dots prepared by the hydrothermal method in one step have high fluorescence quantum yield and stable fluorescence property, and are non-toxic. Detection experiments show that the prepared carbon dots can be used as a fluorescent probe for quantitative detection of CIO<->, and are expected to become a commercial fluorescent probe for CIO<-> detection.

Description

technical field [0001] The invention belongs to the technical field of fluorescent carbon dots, and in particular relates to a carbon dot, a preparation method thereof and an application in detecting hypochlorite. Background technique [0002] Reactive oxygen species (ROS) and reactive nitrogen species (RN) compounds with high oxidative activity play important roles in physiological and biological processes. Unlike most ROS and RN compounds, ClO - It and its protonated counterpart, HClO, are widely used in everyday life as strong oxidizing agents and bleaching agents, including for disinfection of tap water and in many production processes related to our diet. [0003] However, there has recently been increasing evidence that ClO - Excessive use may produce many diseases on the human body, such as osteoarthritis, cancer, kidney disease and other diseases. Therefore, rapid and accurate visual detection of ClO - is of great significance. So far, CDs have been the subject ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65B82Y20/00B82Y40/00C01B32/15G01N21/64
CPCC09K11/65B82Y20/00B82Y40/00C01B32/15G01N21/643C01P2002/82C01P2004/04C01P2004/64C01P2002/72
Inventor 李灏郭嘉庆刘爱坤蔡浩杰曾禹天宋军屈军乐
Owner SHENZHEN UNIV
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