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Sulfur phosphorus nitrogen co-doped carbon point with adjustable fluorescence property and preparation method of sulfur phosphorus nitrogen co-doped carbon point

A fluorescent performance, sulfur, phosphorus and nitrogen technology, applied in the field of sulfur, phosphorus and nitrogen co-doped carbon dots and its preparation, can solve the problems of few literature reports, and achieve fast and reproducible results

Inactive Publication Date: 2014-07-09
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few literature reports on the preparation, properties and application of other heteroatom-doped carbon dots, especially in the preparation, properties and application of heteroatom co-doped carbon dots, which are basically blank.
So far, there has been no report on the one-step preparation of sulfur-phosphorus-nitrogen co-doped carbon dots with tunable fluorescence properties using cucumber juice as a precursor.

Method used

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  • Sulfur phosphorus nitrogen co-doped carbon point with adjustable fluorescence property and preparation method of sulfur phosphorus nitrogen co-doped carbon point
  • Sulfur phosphorus nitrogen co-doped carbon point with adjustable fluorescence property and preparation method of sulfur phosphorus nitrogen co-doped carbon point
  • Sulfur phosphorus nitrogen co-doped carbon point with adjustable fluorescence property and preparation method of sulfur phosphorus nitrogen co-doped carbon point

Examples

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Embodiment 1

[0011] First, use a juice extractor to extract cucumber juice from fresh cucumbers, and then filter through filter membranes with a pore size of 0.45 μm and 0.22 μm in turn to remove large particles to obtain uniform and stable cucumber juice for later use; take 40 mL of the prepared cucumber juice and transfer it to the hydrothermal reaction React in a sealed kettle at 100°C for 6 hours, then cool naturally to room temperature, take out the sample and filter it with a filter membrane with a pore size of 0.22 μm to remove large particles to obtain an aqueous solution of sulfur, phosphorus, and nitrogen co-doped carbon dots; the obtained sulfur, phosphorus, and nitrogen The co-doped carbon dot aqueous solution is concentrated by rotary evaporation, and then freeze-dried by a lyophilizer to prepare sulfur, phosphorus and nitrogen co-doped carbon dots with adjustable fluorescence properties.

Embodiment 2

[0013] First, use a juice extractor to extract cucumber juice from fresh cucumbers, and then filter through filter membranes with a pore size of 0.45 μm and 0.22 μm in turn to remove large particles to obtain uniform and stable cucumber juice for later use; take 40 mL of the prepared cucumber juice and transfer it to the hydrothermal reaction React in a sealed kettle at 120°C for 6 hours, then cool naturally to room temperature, take out the sample and filter it with a filter membrane with a pore size of 0.22 μm to remove large particles to obtain an aqueous solution of sulfur, phosphorus, and nitrogen co-doped carbon dots; the obtained sulfur, phosphorus, and nitrogen The co-doped carbon dot aqueous solution is concentrated by rotary evaporation, and then freeze-dried by a lyophilizer to prepare sulfur, phosphorus and nitrogen co-doped carbon dots with adjustable fluorescence properties.

Embodiment 3

[0015] First, use a juice extractor to extract cucumber juice from fresh cucumbers, and then filter through filter membranes with a pore size of 0.45 μm and 0.22 μm in turn to remove large particles to obtain uniform and stable cucumber juice for later use; take 40 mL of the prepared cucumber juice and transfer it to the hydrothermal reaction React in a sealed kettle at 150°C for 6 hours, then cool naturally to room temperature, take out the sample and filter it with a filter membrane with a pore size of 0.22 μm to remove large particles to obtain an aqueous solution of sulfur, phosphorus, and nitrogen co-doped carbon dots; the prepared sulfur, phosphorus, and nitrogen The co-doped carbon dot aqueous solution is concentrated by rotary evaporation, and then freeze-dried by a lyophilizer to prepare sulfur, phosphorus and nitrogen co-doped carbon dots with adjustable fluorescence properties.

[0016] Depend on figure 1 The element content (atomic number percentage) of the sulfur,...

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Abstract

The invention discloses a sulfur phosphorus nitrogen co-doped carbon point with adjustable fluorescence property and a preparation method of the of sulfur phosphorus nitrogen co-doped carbon point. According to the technical scheme, the carbon point is prepared by processing cucumber juice as a precursor by virtue of a hydrothermal method in one step, has the particle size of 2-8nm, and is an amorphous fluorescent carbon point with the average particle sizes of 5.6nm, 3.5nm and 2.7nm respectively; the wavelengths of corresponding fluorescent spectrums are 450nm, 505nm and 571nm respectively. According to the preparation method, no chemical reagent is added, only the cucumber juice is taken as a unique raw material, a reaction is carried out in a hydrothermal reaction kettle, so that the preparation method is environmental friendly and is convenient, quick and good in repeatability.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterials, and in particular relates to a sulfur, phosphorus and nitrogen co-doped carbon dot with adjustable fluorescence performance and a preparation method thereof. Background technique [0002] Carbon dots are a new type of nanomaterial mainly composed of carbon elements, usually their size is less than 10 nanometers. Since carbon dots were first purified and separated from single-walled carbon nanotubes by electrophoresis in 2004, it has gradually become a rising star in the family of carbon nanomaterials [see: (a) Xu XY, Ray R, Gu Y, Ploehn HJ, Gearheart L , Raker K, et al. J. Am. Chem. Soc 2004; 126(40):12736-7. (b) Baker SN, Baker GA, Angew. Chem. Int. Ed 2010; 49(38):6726- 44]. Compared with traditional semiconductor quantum dots and fluorescent dyes, fluorescent carbon dots have the advantages of good water solubility, good chemical inertness, easy functionalization, high anti-blea...

Claims

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Application Information

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IPC IPC(8): C09K11/70C01B31/02B82Y30/00B82Y40/00C01B32/15
Inventor 卓克垒王春风孙东陈玉娟刘丽红徐攀
Owner HENAN NORMAL UNIV
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