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Preparation method and application of pH fluorescence sensor

A technology of reaction and high-temperature reactor, which is applied in chemical instruments and methods, fluorescence/phosphorescence, instruments, etc., can solve the problems of low detection sensitivity and high detection cost, and achieve good fluorescence performance, good stability and fluorescence performance, good Effect of fluorescence stability

Inactive Publication Date: 2021-10-01
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to solve the problems of high detection cost and low detection sensitivity of the existing detection method for detecting pH in the water environment, and provides a preparation method and application of a fluorescent nanosensor

Method used

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  • Preparation method and application of pH fluorescence sensor
  • Preparation method and application of pH fluorescence sensor
  • Preparation method and application of pH fluorescence sensor

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Experimental program
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specific Embodiment approach 1

[0029] Specific embodiment one: the preparation method of fluorescent nanosensor in this embodiment is characterized in that the method comprises the following steps:

[0030] 1. Dissolve the carbon source raw material in DMF, ultrasonically dissolve at room temperature to form a uniform mixed solution, put the mixed solution into a polytetrafluoroethylene high-temperature reaction kettle, and then put the polytetrafluoroethylene high-temperature reaction kettle into an oven Carry out high-temperature carbonization reaction, the reaction temperature is 160 ℃, and the reaction is completed for 6 hours, and the solution A is obtained, which is the fluorescent carbon dot with pH response; the molar amount of the carbon source material and the volume ratio of DMF are (14) mmol: (30) mL;

[0031] 2. Mix the solution A obtained in step 1 with KOH aqueous solution and stir for 1 min, then put it into a centrifuge tube and centrifuge at a high speed to get the bottom sediment. Dissol...

specific Embodiment approach 2

[0033] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the carbon source material in Step 1 is citric acid. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0034] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the ultrasonic power in step 1 is 60-100W. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method and application of a fluorescent nano sensor, and relates to a preparation method and application of a fluorescent nano sensor. The method comprises the following steps: 1, dissolving citric acid and urea in N, N-dimethylformamide (DMF) to form a mixed solution, filling the mixed solution into a polytetrafluoroethylene high-temperature reaction kettle, and putting the polytetrafluoroethylene high-temperature reaction kettle into a drying oven to react to obtain a solution A; 2, adding potassium hydroxide into the solution A, stirring, and then centrifuging at a high speed to obtain a precipitate B; and 3, centrifugally washing the precipitate B twice at a high speed by using distilled water, and freeze-drying to obtain the fluorescent nano-material with the pH detection function. The method is low in cost, simple and convenient, and high in detection sensitivity. The method is used for detecting the pH in the environment.

Description

technical field [0001] The invention relates to a preparation method and application of a pH fluorescence sensor. Background technique [0002] In recent years, with the frequent occurrence of various pollution incidents in cars, the pollution inside cars has become the third largest pollution problem after decoration pollution and indoor PM2.5 pollution. The materials in the car will release formaldehyde that is harmful to human health. If people are in this "toxic" environment for a long time, people's health will be seriously threatened. The reason why the environment in the car is getting worse and worse is that, in addition to car perfume, inferior rubber, floor mats, "leather" seats, and even steering wheel covers, the culprit is also the substances volatilized from the adhesive, which makes the interior of the car Chemical pollutants such as formaldehyde began to increase. [0003] The lot of documents record, formaldehyde can be combined with protein, mainly shows ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64C09K11/65C09K11/02
CPCG01N21/6428C09K11/65C09K11/025G01N2021/6432G01N2021/6439
Inventor 杨旭东武淼王卯
Owner CHANGCHUN UNIV OF TECH
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