Method for preparing water-soluble carbon quantum dots from banana peel as raw material

A carbon quantum dot and banana peel technology, which is applied in the field of preparation of water-soluble carbon quantum dots, can solve problems such as research on the development and utilization value of banana peels, and achieves abundant carbon sources, simple synthesis process and good biocompatibility. Effect

Inactive Publication Date: 2017-05-31
GUANGXI TEACHERS EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Moreover, the development and utilization value of

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  • Method for preparing water-soluble carbon quantum dots from banana peel as raw material
  • Method for preparing water-soluble carbon quantum dots from banana peel as raw material

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Effect test

Embodiment 1

[0030] 1) Pre-treatment of banana peels;

[0031] 2) Prepare a polyethylene glycol aqueous solution with a concentration of 0.05 to 0.2 g / ml;

[0032] 3) adding the banana peel obtained from the pretreatment into the polyethylene glycol solution, stirring; and placing it at 180° C. for 12 hours to obtain a brown solution;

[0033] 4) filter the brown solution to obtain the filtrate;

[0034] 5) dialyzing the filtrate;

[0035] 6) Evaporating the dialysate under constant temperature conditions to obtain water-soluble carbon quantum dots.

[0036] In the method for preparing water-soluble carbon quantum dots using banana peel as raw material, in the step 3), place at 180° C. and react for 12 hours, specifically: place in the polytetrafluoroethylene liner of the reaction kettle.

[0037] In the preparation method of the water-soluble carbon quantum dots using banana peel as raw material, in the step 6), evaporation, specifically rotary evaporation; constant temperature is 60°C...

Embodiment 2

[0041] 1) Pre-treatment of banana peels;

[0042] 2) preparation concentration is the polyethylene glycol aqueous solution of 0.1g / ml;

[0043] 3) adding the banana peel obtained from the pretreatment into the polyethylene glycol solution, stirring; and placing it at 180° C. for 12 hours to obtain a brown solution;

[0044] 4) filter the brown solution to obtain the filtrate;

[0045] 5) dialyzing the filtrate;

[0046] 6) Evaporating the dialysate under constant temperature conditions to obtain water-soluble carbon quantum dots.

[0047] In the method for preparing water-soluble carbon quantum dots using banana peel as raw material, in the step 3), place at 180° C. and react for 12 hours, specifically: place in the polytetrafluoroethylene liner of the reaction kettle.

[0048] In the preparation method of the water-soluble carbon quantum dots using banana peel as raw material, in the step 6), evaporation, specifically rotary evaporation; constant temperature is 60°C.

[0...

Embodiment 3

[0052] 1) Pre-treatment of banana peels;

[0053] 2) preparation concentration is the polyethylene glycol aqueous solution of 0.2g / ml;

[0054] 3) adding the banana peel obtained from the pretreatment into the polyethylene glycol solution, stirring; and placing it at 180° C. for 12 hours to obtain a brown solution;

[0055] 4) filter the brown solution to obtain the filtrate;

[0056] 5) dialyzing the filtrate;

[0057] 6) Evaporating the dialysate under constant temperature conditions to obtain water-soluble carbon quantum dots.

[0058] In the method for preparing water-soluble carbon quantum dots using banana peel as raw material, in the step 3), place at 180° C. and react for 12 hours, specifically: place in the polytetrafluoroethylene liner of the reaction kettle.

[0059] In the preparation method of the water-soluble carbon quantum dots using banana peel as raw material, in the step 6), evaporation, specifically rotary evaporation; constant temperature is 60°C.

[0...

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Abstract

The invention discloses a method for preparing water-soluble carbon quantum dots from banana peel as a raw material. The method comprises the following steps: 1) pretreating the banana peel; 2) preparing a polyethylene glycol aqueous solution with concentration being 0.05-0.2 g/ml; 3) adding the pre-treated banana peel to the polyethylene glycol solution, stirring the mixture, and placing the mixture at 180 DEG C to react for 12 h to obtain a brown solution; 4) filtering the brown solution to obtain a filtrate; 5) dialyzing the filtrate; 6) evaporating a dialysate at constant temperature to obtain the water-soluble carbon quantum dots. The water-soluble carbon quantum dots are synthesized from waste banana peel in life as a carbon source with a hydrothermal method in one step, the carbon source is rich, the problem of recovery of domestic waste can be solved, the synthesis process is simple, the whole process is green and environment-friendly, and large-scale preparation can be realized.

Description

technical field [0001] The invention belongs to the technical field of fluorescent material preparation, and in particular relates to a preparation method of water-soluble carbon quantum dots using banana peels as raw materials. Background technique [0002] Semiconductor quantum dots (Quantum dots, QDs) have broad application prospects in the research fields of biomarkers, biomedicine and optoelectronic devices due to their good optical, electrical and optoelectronic properties. However, heavy metal elements will inevitably be introduced in the preparation process of conventional semiconductor quantum dots, which is potentially harmful to the environment and human health. Therefore, the development of new fluorescent nanomaterials that are non-toxic, environmentally friendly, and similar to semiconductor quantum dots has become everyone. focus of attention. In recent years, new carbon quantum dots (Carbon quantum dots, CQDs) have been gradually developed and applied. Comp...

Claims

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Application Information

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IPC IPC(8): C01B32/15C09K11/65
CPCC09K11/65C01P2006/60
Inventor 黄珊肖琦杨二利
Owner GUANGXI TEACHERS EDUCATION UNIV
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