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Preparation method and application of double-heteroatom doped porous graphene nano carbon sheet

A technology of carbon nanosheets and heteroatoms, which is applied in the interdisciplinary field of materials and analytical chemistry, to achieve good UV absorption performance, good UV absorption capacity, and simple preparation methods

Active Publication Date: 2020-05-26
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although N-doped porous carbon materials have been successfully applied to the analysis of small molecular compounds by MALDI-TOF MS, so far, there has been no report on the use of double-heteroatom-doped porous carbon materials for MALDI-TOF MS detection of PM. 2.5 Small molecular compounds of medium environmental pollutants

Method used

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  • Preparation method and application of double-heteroatom doped porous graphene nano carbon sheet
  • Preparation method and application of double-heteroatom doped porous graphene nano carbon sheet
  • Preparation method and application of double-heteroatom doped porous graphene nano carbon sheet

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Embodiment 1

[0050] 1. Under stirring conditions at room temperature, take 0.65g thiourea, 1.401g citric acid and 17.55g sodium chloride and dissolve them in secondary water until completely dissolved, then freeze the mixed solution in liquid nitrogen, and Dried to a powder in a lyophilizer for later use.

[0051] 2. Heat the above sample under an argon atmosphere at a heating rate of 5°C / min to 750°C for 2 hours. After cooling down to room temperature, the obtained product is washed twice with water to remove excess sodium chloride and dried. Afterwards, nitrogen- and sulfur-doped porous graphene-like carbon nanosheets (N,S-C) were obtained. Through analysis and detection, the carbon content is 80.68%, the oxygen content is 6.62%, the nitrogen content is 10.86%, and the sulfur content is 1.84%.

[0052] The SEM and TEM characterizations of the prepared N,S-C nanosheets are shown in figure 1 ,From figure 1 As can be seen in a, the material exhibits interconnected graphene-like nanosheet...

Embodiment 2

[0054] 1. Under stirring conditions at room temperature, take 1.3g thiourea, 1.401g citric acid and 17.55g sodium chloride and dissolve them in secondary water until completely dissolved, then place the mixed solution in liquid nitrogen to freeze, and Dried to a powder in a lyophilizer for later use.

[0055] 2. Heat the above sample under an argon atmosphere at a heating rate of 5°C / min to 750°C for 2 hours. After cooling down to room temperature, the obtained product is washed twice with water to remove excess sodium chloride and dried. Afterwards, nitrogen- and sulfur-doped porous graphene-like carbon nanosheets (N,S-C) were obtained. Through analysis and detection, the carbon content is 77.79%, the oxygen content is 6.62%, the nitrogen content is 12.66%, and the sulfur content is 2.93%.

Embodiment 3

[0057] 1. Under stirring conditions at room temperature, take 0.65g thiourea, 2.802g citric acid and 17.55g sodium chloride and dissolve them in secondary water until completely dissolved, then place the mixed solution in liquid nitrogen to freeze, and Dried to a powder in a lyophilizer for later use.

[0058] 2. Heat the above sample under an argon atmosphere at a heating rate of 5°C / min to 750°C for 2 hours. After cooling down to room temperature, the obtained product is washed twice with water to remove excess sodium chloride and dried. Afterwards, nitrogen- and sulfur-doped porous graphene-like carbon nanosheets (N,S-C) were obtained. Through analysis and detection, the carbon content is 83.49%, the oxygen content is 3.81%, the nitrogen content is 10.86%, and the sulfur content is 1.84%.

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Abstract

The invention discloses a preparation method and application of a double-heteroatom doped porous graphene nano carbon sheet. First, through a sodium chloride template method, a heteroelement carbon source is regulated, and through heat treatment, a nitrogen and sulfur double-doped porous carbon nanometer sheet is prepared; then, the material is used as a novel carbon matrix for matrix-assisted laser desorption ionization time-of-flight mass spectrometry, organic environmental pollutant small molecules (m / z is less than 700) are analyzed by mass spectrometry, and the novel matrix can also be used for analyzing the composition and content of the environmental pollutant small molecules in atmospheric haze (PM2.5). The method can also be used for analysis and quantitative detection of different kinds of amino acid biomolecules. When the double-heteroatom doped porous carbon material is used as a new matrix for detecting environmental pollutant molecules, the advantages of low background interference peak, high ion strength and the like are achieved.

Description

technical field [0001] The invention relates to a preparation method of a double heteroatom-doped porous graphene-like nano-carbon sheet, and the application of the material as a new matrix in the detection of atmospheric smog and small molecular environmental pollutants in the environment by matrix-assisted laser desorption ionization time-of-flight mass spectrometry , belonging to the interdisciplinary field of materials and analytical chemistry. Background technique [0002] In recent years, most of the northern cities have severe smog in the cold winter. while PM 2.5 (atmospheric particulate matter with an aerodynamic equivalent diameter of less than 2.5 μm) is the main factor causing smog, which may cause various human diseases such as lung injury and cardiac diastolic insufficiency. It has been reported in the literature (Inhalation Toxicol., 2007, 19, 811–832) that the generation of these adverse factors is related to PM 2.5 The content of heavy metals and organic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/182C01B32/184G01N27/64
CPCC01B32/182C01B32/184G01N27/64C01B2204/32C01B2204/20
Inventor 王俊中赵慧芳郑方才许翔翔
Owner ANHUI UNIVERSITY
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