Carbon nitride paper-based fluorescence sensor for detecting polycyclic aromatic hydrocarbon, preparation method thereof and application of sensor

A technology of fluorescent sensor and carbon nitride paper, which is applied in the field of fluorescent sensing, can solve the problems of long detection period, complicated operation, and low stability of polycyclic aromatic hydrocarbons, and achieve the goal of improving optical stability, high sensitivity, and stable luminescent performance Effect

Active Publication Date: 2019-12-31
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: Aiming at the problems existing in the prior art, the present invention provides a carbon nitride paper-based fluorescence sensor for detecting polycyclic aroma

Method used

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  • Carbon nitride paper-based fluorescence sensor for detecting polycyclic aromatic hydrocarbon, preparation method thereof and application of sensor
  • Carbon nitride paper-based fluorescence sensor for detecting polycyclic aromatic hydrocarbon, preparation method thereof and application of sensor
  • Carbon nitride paper-based fluorescence sensor for detecting polycyclic aromatic hydrocarbon, preparation method thereof and application of sensor

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Example Embodiment

[0045] Example 1

[0046] The preparation process of carbon nitride nanocomposite is as follows:

[0047] Urea is raised to 550°C at a heating rate of 2°C / min in a muffle furnace and kept for 2 hours. CNNS is directly obtained after natural cooling at room temperature. 30mL CNNS aqueous solution (0.2mg / mL) is prepared and ultrasonicated for 30min (power is 100W); Weigh 30mLPMAA-Na, 0.2β-CD and the above CNNS solution and mix and stir uniformly, and then ultrasonic for 15min (power is 100W); the above mixed solution is added dropwise HCl aqueous solution (volume ratio 1:1) during the stirring process ) About 15mL, stir evenly, put the mixed solution in a water bath at 80℃ and heat for 3h, the solution will produce PMAA-CNNS precipitation; after the temperature drops to room temperature, pour out the supernatant and freeze the gelatinous precipitate at the bottom After drying, the obtained particles are collected for later use to obtain the carbon nitride nanocomposite material.

[0...

Example Embodiment

[0058] Example 2

[0059] The preparation process of carbon nitride nanocomposite is as follows:

[0060] Dicyandiamide is heated in a muffle furnace to 550°C for 4 hours at a heating rate of 4°C / min. After natural cooling at room temperature, bulk carbon nitride is obtained. The bulk carbon nitride is subjected to ultrasonic 12 hours liquid phase stripping (Power 100W), get CNNS; prepare 30mL CNNS aqueous solution (0.5mg / mL), ultrasonic for 30min (power 100W); weigh 30mL PAM, 0.3gβ-CD and the above CNNS solution, mix and stir, and then perform ultrasonic for 15min (power 100W); The mixed solution is freeze-dried, and the obtained particles are collected for use to obtain a carbon nitride nanocomposite material.

[0061] The preparation process of carbon nitride paper-based fluorescence sensor is as follows:

[0062] Take the above 1g nanocomposite and disperse it in 15mL ethanol, and cut the filter paper into 2*1cm 2 The size is soaked in the solution for 20 minutes and taken out, a...

Example Embodiment

[0066] Example 3

[0067] The preparation process of carbon nitride nanocomposite is as follows:

[0068] Melamine is heated in a muffle furnace at a heating rate of 4°C / min to 600°C for 4 hours. After natural cooling at room temperature, bulk carbon nitride is obtained. The bulk carbon nitride is subjected to ultrasonic 12 hours liquid phase stripping (power 100W ) To obtain CNNS; prepare 30mL CNNS aqueous solution (0.05mg / mL), sonicate for 30min (power 100W); add 0.6g DMA and 0.05g MBA to CNNS solution and mix, transfer the mixed solution to a vial, and blow nitrogen 3- For 5 minutes, tighten the lid and irradiate it with a 100W fluorescent lamp until the gel is produced; freeze-dry the gel, and collect the obtained particles for later use to obtain the carbon nitride nanocomposite material.

[0069] The preparation process of carbon nitride paper-based fluorescence sensor is as follows:

[0070] Take 1g of nanocomposite material and disperse it in 20mL DMF, and cut the filter pape...

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Abstract

The invention discloses a carbon nitride paper-based fluorescence sensor for detecting polycyclic aromatic hydrocarbon, a preparation method thereof and application of the carbon nitride paper-based fluorescence sensor. According to the carbon nitride paper-based fluorescence sensor, a carbon nitride nano composite material is prepared; and the carbon nitride nano composite material is loaded on filter paper, so that the carbon nitride paper-based fluorescence sensor can be obtained. On the basis of the excellent luminescence property and film forming process of the carbon nitride, the carbonnitride is compounded with a high polymer material, and an obtained compound is loaded onto the filter paper, so that the carbon nitride paper-based fluorescence sensor can be obtained. By virtue of pi-pi interaction between the CNNS (carbon nitride nanosheet) and PAHs, generated fluorescence is quenched, so that the linear detection of the PAHs is carried out. With the carbon nitride paper-basedfluorescence sensor provided by the invention adopted, the problems of long detection period, complex operation, low stability and the like of the detection of polycyclic aromatic hydrocarbon in the prior art can be solved, the PAHs can be effectively detected. The sensor has the advantages of convenient and rapid detection, easiness in carrying, and high detection sensitivity.

Description

technical field [0001] The invention belongs to the field of fluorescence sensing, and in particular relates to a carbon nitride paper-based fluorescence sensor for detecting polycyclic aromatic hydrocarbons, a preparation method and application thereof. Background technique [0002] Due to the incomplete combustion of carbon-containing compounds in nature, a large number of toxic and carcinogenic polycyclic aromatic hydrocarbons (PAHs) are widely present in the air, soil and food, and the chemical structure of PAHs is very stable, and it is easy to produce abundant in organisms. It is difficult to remove, which seriously threatens human life and health. Therefore, for PAHs, the development of an efficient, sensitive and simple detection method is a hot spot of concern all over the world. As early as 1976, the U.S. Environmental Protection Agency listed 16 kinds of polycyclic aromatic hydrocarbons including "naphthalene, anthracene, and phenanthrene" as priority pollutants;...

Claims

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Application Information

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IPC IPC(8): G01N21/64
CPCG01N21/643G01N2021/6432
Inventor 张袁健韩丹沈艳飞
Owner SOUTHEAST UNIV
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