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Preparation method of fluorescent carbon nanoparticles by direct hydrothermal carbonization of kelp

A technology of carbon nano-particles and hydrothermal carbonization, applied in chemical instruments and methods, nanotechnology, nano-optics, etc., to achieve excellent fluorescence performance, strong practicability, and easy promotion

Active Publication Date: 2016-11-16
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Up to now, there are no domestic and foreign related literature and patent reports on using natural kelp as a carbon source to directly hydrothermally carbonize kelp to prepare fluorescent carbon nanoparticles

Method used

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  • Preparation method of fluorescent carbon nanoparticles by direct hydrothermal carbonization of kelp
  • Preparation method of fluorescent carbon nanoparticles by direct hydrothermal carbonization of kelp
  • Preparation method of fluorescent carbon nanoparticles by direct hydrothermal carbonization of kelp

Examples

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Effect test

Embodiment 1

[0045] Direct hydrothermal carbonization of kelp to prepare fluorescent carbon nanoparticles, the detailed preparation steps are as follows: (1) Wash 250 g of freshly purchased kelp with water, cut into small pieces and place them on a tray, then transfer them to an oven at 60 ° C. Drying treatment, crush it into powder with a pulverizer, sieve the powder through an 80-mesh sieve to obtain fine and uniform dry seaweed powder; (2) Weigh 1g dry seaweed powder and place it in a clean beaker, pour it into Add 2 mL of ethanol, stir well to obtain a paste, transfer the paste to an autoclave, and react continuously for 10 h at 120°C to prepare fluorescent carbon nanoparticles; (3) add the product to deionized water, disperse After uniformity, vacuum filtration is carried out, and the obtained filtrate is removed by rotary evaporation at 60°C to remove a large amount of solvent, and then centrifuged at 8000rpm for 25min, and the obtained precipitate is dried in an oven to obtain carbon...

Embodiment 2

[0048] The detailed preparation steps are as follows: (1) Wash 500g of freshly purchased kelp with water, cut it into small pieces, place it on a tray, then transfer it to an oven, dry it at 70°C, and crush it with a pulverizer into a powder, and the powder is sieved through a 100-mesh sieve to obtain fine and uniform dry seaweed powder; (2) Weigh 2g of dry seaweed powder and place it in a clean beaker, add 5mL propanol to it, and stir well to obtain a paste transfer the paste to a high-pressure reactor, and react continuously at 140°C for 8 hours to prepare fluorescent carbon nanoparticles; (3) add the product to deionized water, disperse it evenly, and carry out vacuum filtration, and the obtained filtrate is in Remove a large amount of solvent by rotary evaporation at 70°C, then centrifuge at 10,000rpm for 20min, dry the resulting precipitate in an oven to obtain carbon nanoparticle powder, take a certain amount of the powder and disperse it in deionized water to obtain a di...

Embodiment 3

[0050] The detailed preparation steps are as follows: (1) Wash 750g of freshly purchased kelp with water, cut it into small pieces and place it on a tray, then transfer it to an oven, dry it at 80°C, and crush it with a pulverizer into a powder, and the powder is sieved through a 120-mesh sieve to obtain fine and uniform dry seaweed powder; (2) Weigh 3g dry seaweed powder and place it in a clean beaker, add 10mL n-butanol to it, stir well to obtain a paste transfer the paste to a high-pressure reactor, and react continuously at 160°C for 6 hours to prepare fluorescent carbon nanoparticles; (3) add the product to deionized water, disperse it evenly, and carry out vacuum filtration, and the obtained filtrate Remove a large amount of solvent by rotary evaporation at 80°C, then centrifuge at 12000rpm for 15min, dry the resulting precipitate in an oven to obtain carbon nanoparticle powder, take a certain amount of the powder and disperse it in deionized water to obtain carbon nanopa...

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Abstract

The present invention provides a preparation method of fluorescent carbon nanoparticles by direct hydrothermal carbonization of kelp. The method includes the steps of: (1) washing fresh kelp with water, segmenting, drying, grinding into powder by a pulverizer, screening the powder to obtain a kelp powder; (2) weighing a certain amount of kelp powder, dispersing in alcohol liquid, fully stirring to obtain a paste, transferring the paste into a high-pressure reactor, and conducting high temperature reaction for some time to obtain a dark brown product; (3) dissolving the product with deionized water, conducting vacuum filtration, conducting rotary evaporation on a filtrate, centrifuging the concentrated solution, removing a supernatant, placing the precipitate in an oven for drying to obtain carbon nano particle powder; and dispersing a certain amount of powder in deionized water to obtain the fluorescent carbon nanoparticles dispersion. The method of the invention has simple operation; the prepared product has good biocompatibility, excellent fluorescent performance, and shows application prospects in the fields of sensors, light emitting devices, cell marking and biological imaging.

Description

technical field [0001] The invention belongs to the technical field of preparation of fluorescent quantum dots and nanometer materials, in particular to a method for directly hydrothermally carbonizing kelp to prepare fluorescent carbon nanoparticles. Background technique [0002] Fluorescent carbon nanoparticles (or fluorescent carbon dots, fluorescent carbon quantum dots or fluorescent carbon nanoparticles, etc.) are a new type of fluorescent nanomaterials newly developed in recent years. , with good monodispersity and excellent biocompatibility. Compared with traditional fluorescent semiconductor quantum dots and organic fluorescent dyes, fluorescent carbon nanoparticles not only have the advantages of low toxicity or non-toxicity and biocompatibility of carbon-based nanomaterials, but also have excellent water dispersibility. Tune, good colloidal and photochemical stability, no light flicker, easy functionalization, easy to obtain raw materials, simple preparation, low ...

Claims

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Application Information

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IPC IPC(8): C09K11/65C01B31/02B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C01P2004/64C01P2006/60C09K11/65
Inventor 桂日军何伟杰金辉王宗花李金花
Owner QINGDAO UNIV
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