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Method for preparing carbon dots with hydrothermal process on basis of plant leaves

A technology of plant leaves and hydrothermal method, which is applied in the field of preparation of carbon dots by hydrothermal method, can solve the problems of inapplicability to wide application, high cost, complicated treatment, etc., and achieve the effect of easy promotion and use, low cost and good repeatability

Inactive Publication Date: 2015-01-07
中国人民解放军防化学院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Huang et al. synthesized carbon dots based on strawberry juice as a carbon source and established Hg 2+ The detection method; Adhimoorthy et al. After drying and decolorizing the orange peel, the hydrothermal method obtained fluorescent carbon dots. Although a green carbon source was used, the cost was high, or the treatment was complicated, and it was not suitable for wide application.

Method used

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  • Method for preparing carbon dots with hydrothermal process on basis of plant leaves
  • Method for preparing carbon dots with hydrothermal process on basis of plant leaves
  • Method for preparing carbon dots with hydrothermal process on basis of plant leaves

Examples

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Effect test

Embodiment 1

[0027] Weigh 2.58g of washed and dried fresh epiphyllum branches, cut them into pieces, transfer them to a 25mL reaction kettle, add 10mL of water to mix, and conduct a hydrothermal reaction at 180°C for 8.5 hours. After cooling to room temperature, filter to obtain a brownish-yellow liquid, centrifuge at 10krpm for 25min, and take the supernatant.

Embodiment 2

[0029] Weigh 0.38g of washed and dried mint leaves, grind them, transfer them to a 25mL reaction kettle, add 15mL of water and mix well, react in hydrothermal reaction at 180°C for 9 hours, cool to room temperature, filter and centrifuge at 4000rpm for 15min Finally, a brownish yellow liquid was obtained, and the supernatant was dialyzed for 24 hours with a dialysis bag with a molecular weight cut off of 3500, and the dialysate was collected.

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Abstract

The invention discloses a method for preparing carbon dots with a hydrothermal process on the basis of plant leaves. The plant leaves are transferred into a reaction kettle, ultrapure water is added, and the mixture is uniformly mixed and subjected to hydrothermal treatment at the temperature of 130 DEG C-250 DEG C for 2-15 hours; the mixture is cooled and filtered to obtain a brown yellow liquid, the brown yellow liquid is subjected to dialysis for 15-48 hours by a dialysis bag with interception of 3,500, and dialysate is collected; or high-speed centrifugation is performed, and fluorescent carbon dots are obtained. The method is simple and safe to operate, environment-friendly raw materials are used, chemical reagents and surface passivation are not required for assisting synthesis, and the method can be applied to the fields of fluorescence labeling, analysis, sensing, catalyzing and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and relates to a method for preparing carbon dots based on a plant leaf hydrothermal method, in particular to a one-step hydrothermal method for preparing carbon dots using plant leaves as a carbon source. Background technique [0002] Carbon dots (also known as carbon quantum dots) are carbon particles with a particle size of less than 10nm. Good, photobleaching resistance, good biocompatibility and low toxicity, it is an excellent electron acceptor and electron donor, and has broad application prospects in biological imaging, analysis and detection, sensing, optoelectronics and other fields. [0003] There are many methods reported for the preparation of carbon dots. It can be roughly divided into two categories: top-down methods and bottom-up methods. The top-down method is usually to etch carbon dots from larger carbon structure materials, including arc discharge method, laser ablatio...

Claims

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Application Information

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IPC IPC(8): C01B31/02C09K11/65
Inventor 吴泓毅沈永玲黄志平刘国宏汪吉章
Owner 中国人民解放军防化学院
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