Preparation and application of carbon dot test paper for detecting gaseous singlet oxygen

A technology of singlet oxygen and carbon dots, which is applied in the field of analysis and detection, can solve the problems of singlet oxygen limitations, etc., and achieve the effects of easy detection, reduced detection equipment cost, and easy portability

Pending Publication Date: 2022-05-03
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, singlet oxygen is still limited to the fluorescence change in aqueous solution for quantitative or qualitative detection, and cannot be directly measured by simple test paper

Method used

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  • Preparation and application of carbon dot test paper for detecting gaseous singlet oxygen
  • Preparation and application of carbon dot test paper for detecting gaseous singlet oxygen
  • Preparation and application of carbon dot test paper for detecting gaseous singlet oxygen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Mix 0.1mol / L o-phenylenediamine and 0.05mol / L catechol aqueous solution evenly, add 0.1mol / L phosphoric acid, and transfer the mixed solution to a 25mL reaction kettle after ultrasonication for 10min. Raise the temperature to 180°C in an oven and keep it warm for 6h. After the reaction kettle was cooled to room temperature, the crude product obtained by carbonization was dissolved in ultrapure water, and a purified carbon dot solution was obtained after centrifugation at 10,000 rpm for 20 min. Absorbent paper is added to the carbon dot aqueous solution, and after drying, the carbon dot test paper is obtained.

[0036] The morphology of carbon dots was observed by transmission electron microscope. Such as figure 2 As shown, the obtained carbon dot particles are uniformly dispersed, and the average particle diameter is 14.05nm.

[0037] Utilize the ultraviolet-visible spectrophotometer to carry out ultraviolet spectrum test to the prepared carbon dot, the result is as...

Embodiment 2

[0044]Mix 0.2mol / L m-phenylenediamine and 0.1mol / L resorcinol aqueous solution evenly, add 0.5mol / L phosphoric acid, and transfer the mixed solution to a 25mL reaction kettle after ultrasonication for 10min. Raise the temperature to 180°C in an oven and keep it warm for 4h. After the reactor was cooled to room temperature, the crude product obtained by carbonization was dissolved in ultrapure water and dialyzed with a 3500 Da dialysis bag for 48 hours to remove unreacted small molecules. Finally, a purified carbon dot solution is obtained. Absorbent paper is added to the carbon dot aqueous solution, and after drying, the carbon dot test paper is obtained.

[0045] Using the method of Example 1 to detect the carbon point test paper prepared in this example, when the gaseous singlet oxygen was introduced, the prepared carbon point test paper had obvious red spots, indicating that the carbon point test paper can be used to detect gaseous singlet oxygen. .

Embodiment 3

[0047] Mix 0.5mol / L p-phenylenediamine and 1.0mol / L hydroquinone aqueous solution evenly, add 0.2mol / L phosphoric acid, and transfer the mixed solution to a 25mL reaction kettle after ultrasonication for 10min. Raise the temperature to 140°C in an oven and keep it warm for 8h. After the reactor was cooled to room temperature, the crude product obtained by carbonization was dissolved in ultrapure water, and a purified carbon dot solution was obtained after centrifugation at 12000 rpm for 10 min. Absorbent paper is added to the carbon dot aqueous solution, and after drying, the carbon dot test paper is obtained.

[0048] Using the method of Example 1 to detect the carbon point test paper prepared in this example, when the gaseous singlet oxygen was introduced, the prepared carbon point test paper had obvious red spots, indicating that the carbon point test paper can be used to detect gaseous singlet oxygen. .

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Abstract

The invention discloses preparation and application of carbon dot test paper for detecting gaseous singlet oxygen, and belongs to the field of analysis and detection. The preparation method comprises the following steps: performing hydrothermal reaction on carbon sources A and B and phosphoric acid to obtain a crude product; the carbon source A is an aromatic hydrocarbon compound containing an amino group, the carbon source B is an aromatic hydrocarbon compound containing a hydroxyl group, preparing the obtained carbon dots into a carbon dot solution, adding absorbent paper, and drying to obtain the carbon dot test paper. The prepared carbon dot test paper can qualitatively detect whether gaseous singlet oxygen exists or not through a test paper color change method, effectively solves the problem of detection of the gaseous singlet oxygen, is convenient to carry and can be used for real-time detection of the gaseous singlet oxygen.

Description

technical field [0001] The invention belongs to the field of analysis and detection, and in particular relates to the preparation and application of a carbon point test paper for detection of gaseous singlet oxygen. Background technique [0002] Singlet oxygen is molecular oxygen in an excited state, which is a kind of active oxygen. It is chemically active and less stable than oxygen molecules in the ground state. Singlet oxygen widely exists in the physiological metabolism of animals and plants, the transformation of air pollutants and the degradation of organic matter. Due to the short lifetime and high reactivity of singlet oxygen, the detection of singlet oxygen has become an important challenge. At present, the detection methods that have been developed mainly include: electron paramagnetic resonance, spectrophotometry, chemiluminescence, chromatography and fluorescence photometry. Although the existing detection methods have high sensitivity, the instruments used a...

Claims

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Application Information

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IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 宋启军徐雅兰王婵冉国侠
Owner JIANGNAN UNIV
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